31746_Hayward Filtration

31746_Hayward Filtration
HAYWARD FILTRATION
®
AUTOMATIC
SELF-CLEANING
&
FABRICATED
PIPELINE
STRAINERS
TABLE OF
CONTENTS
2
Introduction to
HAYWARD Filtration
4
Hayward Manufacturing Capabilities
Specially trained workers using the latest equipment in a modern facility have
the capability to fabricate just about any type of pipeline strainer…nothing is too
big, too small or too special.
Introduction to
Custom Fabricated Strainers
7
6
Model 90 Simplex Strainers
Simplex Strainers are installed into systems that can be shut down for basket cleaning or
change out. The Model 90 has a simple, cost effective design that can be customized to fit
unique operating or dimensional requirements.
Model 900 & 950 Duplex
Pipeline Strainer
12
Duplex Strainers never require the system to be shut down for basket cleaning: the system can
run continuously. Two separate, independent straining chambers are connected with a piping/valve arrangement to permit the flow to be switched from one chamber to the other.
16
Model 91 Tee Strainers
Very compact, low-profile design strainers that work in either a vertical or horizontal installation. Available with two types of standard covers and can be adapted to almost any system.
Recommended for pump protection.
Automatic Self-Cleaning
Strainers Overview
Describes the design of these special strainers and the applications that they are used in.
19
Automatic Self-Cleaning Strainers Operation
20
How Hayward Automatic Self-Cleaning Strainers work.
22
Automatic Self-Cleaning Strainers
Engineering Drawings
Strainers for Low Differential
Pressure Applications
24
Hayward’s unique design for systems with line pressures below 20psi.
26
Strainer Screen Elements
Perhaps the most important part of the strainer…how to choose the right one.
Self-Cleaning Strainer
Components
28 Application
27
Considerations
Automatic Strainer Control Systems
29
Control panels that monitor and operate the strainer.
30
Technical Information
Automatic Strainer Sizing Information, Automatic Strainer Sample Specifications, Automatic
Strainer Application Worksheet, Fabricated Strainer Application Worksheet, Technical Data,
Standard Cast & Plastic Pipeline Strainers and Bag Filtration Systems
HAYWARD FILTRATION
Thousand of different types of
HAYWARD® Filter Bags are
available.
HAYFLOWTM Filter
Element…the next generation
of filtration.
MAXILINETM Multi-Bag Filter
Housing with QIC LOCK cover for
fast filter media change out.
In 1923 Hayward began manufacturing specialty metal
valves and industrial flow control products in a small
shop in Brooklyn, NY. Since then Hayward Filtration has
evolved through strategic acquisitions and technological
advances into a global organization supplying solutions
to customers’ filtration, straining and separation problems around the world. Hayward Filtration has seven
manufacturing facilities on four continents, 26 wholly
owned subsidiaries and an independent distribution network that today serves customers in over 45 countries.
HAYWARD® Pipeline Strainers are manufactured in an
ISO 9001:2000 certified facility in Elizabeth, New Jersey.
They are used by industrial and commercial customers
to protect their process piping equipment by removing
debris from the liquid that flows through pipelines.
Products include automatic self-cleaning strainers as
well as manual, duplex, simplex and Y strainers. Both
cast and fabricated type strainers are made in standard
configurations to meet the needs of most applications.
2
WRIGHT-AUSTINTMSeparators
remove 99% of moisture
and particulate matter from
air, gas and steam lines.
For unique, complex, or specialized applications
Hayward’s Engineering Group can work with customers
to design a strainer to meet the exact requirements of
the application with no compromises. Strainers are
manufactured in sizes from a tiny 1/2” up to a huge 48”
pipeline size.
Beginning in the 1980’s Hayward began to expand its
cast basket strainer product offering with the addition of
Y strainers through the acquisition of the Y Strainer
Division of the Leslie Corporation in 1981. Gordon
Engineering, a manufacturer and designer of fabricated
strainers, was acquired in 1985. Automatic-self cleaning strainers were added to Hayward’s product line
with the acquisition of the Fluid Handling Division of Zurn
Industries in 1986.
In 1994 Hayward entered the filtration market with a
specialized line of industrial and commercial filtration
products. In 1996 the Filtration Division of American Felt
INTRODUCTION
Cast iron simplex
strainer
This duplex strainer for a 36"
pipeline illustrates Hayward's
custom fabrication capabilities
Stainless steel bag filters in both
single and double length sizes
and Filter was acquired adding bag filters and filter
media to the product offering. Loeffler Filter-Technique,
headquartered in Nettersheim, Germany was acquired
in 1998. This greatly increased Hayward’s product offering and expanded global sales. In 1999 GAF® Filter
Systems was acquired further enlarging the product
offering and increasing worldwide sales. Hayward
Filtration is now one of the largest manufactures of bag
filtrations systems in the world. In 2000 the Loeffer and
GAF Filter System product lines were combined under
the Hayward name.
Hayward Filtration also manufactures the WRIGHT-AUSTINTM
brand of gas/liquid separators. These separators
remove moisture and particulate matter from air, gas
and steam lines thus protecting expensive equipment
such as turbines. The Wright-Austin Company, established in 1894, was acquired by Hayward in 1996.
Hayward Filtration’s gas/liquid separator customers can
3
Gas/liquid separators remove
moisture and particulate matter from compressed air, gas
or steam lines
take advantage of the company’s over 100 years experience in separation applications.
Hayward Filtration’s greatest achievement over the
years has been the development and implementation of
a single global product line manufactured worldwide in
multiple locations to a common design standard yet in
compliance with local code requirements. This manufacturing flexibility lets customers worldwide choose the
pipeline strainer, bag filter or gas/liquid separator that
meets their exact requirements without compromise.
Local Hayward Filtration Sales and Technical Support
Specialists are always available to review the needs of
an application with the customer and recommend specific solutions. This local support extends from initial purchase, to installation, through start up and beyond.
HAYWARD FILTRATION
ASME Sec. IX certified
welders insure the
integrity of all HAYWARD®
fabricated strainers.
High-speed CNC machining equipment is used to
insure conformance to
specifications and to
maintain the tight tolerances required by
Hayward and our customers.
A custom horizontal
Model 90 Simplex
Strainer ready for
shipment to a customer.
The strainer has a davit
assembly to make cover
removal for access to the
strainer basket a one
person operation.
4
Component parts are
machined to tight
tolerance with advanced
machining equipment.
MANUFACTURING CAPABILITIES
Skilled workers using the
latest technology
increase productivity to
make HAYWARD fabricated strainers a cost effective choice.
A Model 90 Simplex
Strainer during
manufacture in
Hayward’s advanced
welding shop.
Automatic Self-Cleaning
Strainer during the initial
assembly phase of
construction. All strainers,
no matter how large or
complex, are tested three
ways... for proper operation, conformance to all
specifications, and then
they undergo a complete
pressure test.
5
Automatic Self-Cleaning
Strainer during a final
machining operation.
Hayward has the latest
equipment so that fabrication operations can be
done in house. This
insures the integrity of
the process, reduces the
final cost, and improves
lead times.
This large, advanced
design plasma cutting
machine is just one
example of the
investment Hayward
has made in equipment
needed to fabricate
almost any type of
strainer.
INTRODUCTION TO CUSTOM FABRICATED STRAINERS
Nothing Too Big, Too
Small or Too Special
When unwanted solid material has to
be removed from flowing fluids in
order to protect equipment, a
HAYWARD® Strainer is the answer.
Not only does the strainer protect
equipment, it improves productivity
by reducing maintenance and downtime.
While Hayward offers the world’s
most complete line of cast strainers,
sometimes, because of space limitations, the need for a special alloy,
unique piping connection, cover
opening system or size, a custom
strainer is required. In these cases, a
cast strainer will just not work
because often it is not easy or possible to modify the cast metal unit.
Hayward solves these application
problems by fabricating pipeline
strainers to meet the requirements of
any straining application.
Fabricated strainers, because they
are manufactured one at a time, can
be made to fit the exact requirements of the application. There are
no trade offs. You get the perfect
strainer for your application…you
never have to pay for more strainer
than you need…or settle for a strainer that won’t quite do the job you
want it to.
Often it is not necessary to go to the
time and trouble to design a strainer
from scratch. Hayward has several
simplex, duplex, and tee type
designs of fabricated strainers. Very
often one of these basic designs can
be used “as is” or slightly modified
with a different cover or piping connection to fit the application.
24” Model 2596
self-cleaning
strainer.
6
When a standard design fabricated
strainer, even with modifications, will
not meet the applications requirements, Hayward’s Custom
Fabricated Strainer Design Team will
work with your engineers to create a
unique strainer that will. We have
over 75 years experience designing
and building fabricated pipeline
strainers. Your application might not
be as unique as you think. Over the
years we’ve seen thousands of different applications and can often
offer a solution to your straining
application problem right from our
database of special strainer designs.
If you have already created the
design parameters of the strainer you
need, Hayward is the company to
manufacture it for you. We can
review the design and suggest
changes to improve performance or
reduce costs. Our large manufacturing facility with the most up to date
equipment and skilled personnel
allows Hayward to deliver what others can only promise. With our manufacturing capabilities and investment
in equipment, all but the most specialized fabrication work can be done
in-house – reducing costs and expediting delivery of your finished strainer.
Getting involved with small shops or
manufacturers that contract most of
the work out to others will end up
costing you time and money and
even then the finished product may
not be exactly to specification. What
happens then? At Hayward our ISO
9001:2000 Quality Assurance
Certification insures that the finished
product will be exactly as you
designed it and that it will perform to
specification.
SIMPLEX STRAINER
The HAYWARD® Model 90 Fabricated
Simplex Strainer has been designed for
manufacturing flexibility. It can be
made for pipeline sizes from 1” to 48”
in carbon steel or stainless steel
although other materials can be specified. Three different ratings of flange
connections are commonly available:
ANSI Class 150, 300, and 600. Higher
pressures are also available. The
strainer features an in-line design that
adapts to most applications.
Two different types of covers are available. The simplest type is the bolted
cover which is simple and cost effective and works well in applications
where basket changing is infrequent. A
davit assembly can also be specified
for larger strainers with heavy covers.
This makes it possible for a single person to remove the cover of the strainer.
If the strainer will be opened frequently for basket cleaning, a bolted cover
can be less effective because of the
time needed to remove and then tighten the bolts. For these applications
Hayward offers a special, hinged,
quick opening cover that is secured by
swing bolts. This type of quick opening
cover can even be adapted for higher
MODEL 90
pressure applications. For medium
size strainers, 8” to 16”, a bolted slide
hinge cover is available. This permits a
single operator to open the cover.
Hayward can also design and manufacture special covers to meet any
applications requirements.
Hayward has designed a special,
unique strainer basket for the Model
90 Fabricated Strainer. The basket has
a slant top design which improves the
flow through the strainer and results in
significantly lower pressure drops than
would otherwise be the case. The slant
top design results in a more compact
basket which weighs less than an ordinary basket and makes it possible for a
single person to remove it from the
strainer housing. A real labor saving
feature when it becomes time to clean
or change out the basket. Strainer
baskets for the Model 90 are made of
stainless steel, although almost any
type of material can be specified.
Basket perforations from 1/32” up to 1”
are available and mesh linings in sizes
from 20 to 400 mesh for fine straining
applications can be specified.
The Model 90 Fabricated Simplex
Strainer will meet the requirements of
most simplex strainer applications. It is
8” Model 90 carbon steel with
bolted cover.
Basket & Screen Effective Area
Strainer
Model
Pipe Size
in.
Perforation
Size - in.
Nominal Area
of Pipe (sq in)
Gross Screen
Area (sq in)
Free Area (sq in)
Ratio Free Area
to Pipe Area
90
2
5/32
3.35
78
49
14.60
90
3
5/32
7.39
94
59
8.00
90
4
5/32
12.73
151
95
7.46
90
5
5/32
20.00
204
128
6.40
90
6
5/32
28.90
283
178
6.16
90
8
5/32
50.02
478
301
6.02
90
10
5/32
78.85
691
435
5.52
90
12
5/32
111.93
942
593
5.30
90
14
5/32
135.28
1320
832
6.15
90
16
5/32
176.71
1659
1045
5.91
90
18
5/32
223.68
1979
1247
5.57
90
20
5/32
277.95
2513
1583
5.70
90
24*
5/32
402.00
4071
2565
6.38
*Contact Hayward for larger sizes. Dimensions are for reference only.
7
also easy to customize the strainer to
meet special application requirements.
Some common, easy-to-fabricate
modifications are rotated nozzles, offset nozzles, and horizontal-vertical
flow. Rotated inlet and outlet nozzles
such as a right angle design can eliminate the requirement for an elbow in
the downstream piping. Offset nozzles, lowering or raising either the inlet
or outlet nozzle, can often eliminate
serious alignment and support problems. The horizontal-vertical design
with the flow exiting the strainer at a
90 degree angle can simplify the
installation of a strainer in an already
existing piping system.
Special Model 90 strainer with offset
nozzles, quick open cover, and
flanged drain.
Fabricated simplex strainers can also
be designed with a backflush/ backwash option. In these designs a piping
connection with an on/off backflush
valve is fabricated at the strainer bottom and has a connection to the bottom of the strainer basket. When
solids accumulate in the bottom of the
basket, the backflush valve is opened
and the differential pressure between
the operating pressure and the backflush system removes the solids without shutting the system down.
Backflushing is often supplemented
by a back washing operation.
24” Model 90 low profile carbon steel fabricated strainer
8
Backwashing is done by having fluid
flow, under pressure, in the reverse
direction into an empty strainer. This
flow reversal backwashes the basket
and removes the residual dirt.
Backwashing is often regarded as a
second step, used to remove dirt not
removed by backflushing.
Steam jacketing is another option
available for fabricated strainers.
Steam jacketing is used to maintain
critical fluid temperatures through the
strainer. High temperatures are often
required to process and transport
highly viscous fluids. This modification
is designed so that there is no impact
on the function or normal maintenance of the strainer. Steam jacketing
is available in carbon steel and type
316 stainless steel for service up to
450F.
Hayward can design and fabricate
Model 90 strainers to ASME section
VIII and ANSI B31.1, .3, .4, .7, and .8
codes. Hayward welders are qualified
to ASME Sec. IX.
Contact us today to discuss
your special fabricated simplex strainer requirements.
MODEL 90
SIMPLEX STRAINER
•Sizes from 4” to 24” - As Standard
• Two cover types available: quick opening
•Available in Carbon Steel - Stainless Steel
hinged & bolted blind.
•Flanged ANSI Class 150 and 300 - As Standard
• Davit assembly optional
•Flanged Class 600 and higher - Available on
• Basket material: stainless steel, 1/32” to 1/2”
request
perforation diameter. 20 to 400 mesh linings also
available.
Bolted Cover
Dimensions
B
A
Nom
Size
Class Class
150 300
C
Quick-Opening Hinged Cover
Net Weight (lb)
D
E
F
Class Class
150 300
Class 150
Dimensions
Class 300
B
A
Nom
Size
Cover Unit Cover Unit
Class Class
150 300
C
Net Weight (lb)
D
E
F
Class 150
Class
150/
300
Class 300
Cover Unit Cover Unit
**
**
4
16
16
14
81/4
91/2
85/8
1
21
45
147
81
219
4
16
16
14
91/2
85/8
1
21
9
122
9
158
5
16
171/2
15
91/2
11
103/4
1
22
45
153
81
237
5
16
171/2
15
111/4
103/4
1
22
9
128
9
176
6
20
21
17
91/2
11
103/4
1
24
70
203
127
328
6
20
21
17
111/4
103/4
1
24
12
168
12
236
8
22
23
21
11
121/2
123/4
11/2
28
110
281
184
407
8
22
23
21
13
123/4
11/2
28
15
226
15
278
10
32
33
25
13
141/2
16
11/2
33
170
450
307
710
10
32
33
25
153/4
16
11/2
33
30
360
30
483
12
35
36
28
141/2
16
18
11/2
39
209
644
390
1024
12
35
36
28
173/4
18
11/2
39
37
535
37
734
14
37
38
33
153/4
171/2
20
2
45
272
951
492
1397
14
37
38
33
193/4
20
2
45
46
804
46
1030
16
42
43
36
181/4
20
24
2
49
411
1409
754
2011
16
42
43
36
231/4
24
2
49
68
1188
68
1437
18
42
43
39
181/4
20
24
2
53
411
1486
754
2127
18
42
43
39
231/4
24
2
53
68
1255
68
1553
20
43
441/2
44
213/4
24
30
2
59
411
1553
754
2231
20
43
441/2
44
273/4
30
2
59
71
1322
71
1656
24
48
493/4
60
213/4
24
30
2
78
681
2291 1403 3497
24
48
493/4
60
273/4
30
2
78
88
1860
88
2344
Dimensions are in inches
Dimensions are in inches
These dimensions are for reference only. For installation purposes, request certified drawings.
** Force required to lift cover in lb.
These dimensions are for reference only. For installation purposes, request certified drawings.
Contact Hayward for larger sizes.
9
SIMPLEX STRAINER
MODEL 90
COVER OPENING OPTIONS:
Maintenance problems can result if proper consideration is not given to the process involved in
removing and replacing strainer access covers. This is particularly true in sizes larger than 8" where
the cover weight can easily exceed 150 pounds, in which case additional personnel and equipment
may be required. The Hayward designs listed below were developed to eliminate the problems associated with this process.
Standard Hinged
The quick opening hinged cover is
available on most fabricated strainers.
It has the added advantage of swing
bolts, and is particularly helpful if the
access is on the vertical or bottom.
Integral Davit
The cover lift davit can reduce any
cover lift process to a one man operation.
Bolted Slide Hinge
The slide hinge in medium size ranges
(8"-16") permits a single operator to
engage the hinge and open the cover.
NOZZLE PLACEMENT OPTIONS:
Fabricated strainers are available with a multitude of nozzle design options to adapt them to existing or contemplated piping schemes.
Rotated Nozzles
Right angle design can eliminate the
requirement for an elbow in the
downstream piping.
Offset Nozzle
Horizontal-Vertical
By lowering or raising either nozzle,
serious alignment and support problems can be avoided.
The above right angle design is especially appropriate for existing piping,
and is typical of the many modifications that are possible.
10
OPTIONS
BACKFLUSH/BACKWASH OPTION:
Custom Fabricated simplex and duplex strainers are available with this important option.
(A) Valve closed - dirt accumulated
(B) Valve open - dirt removed thru
backwash piping.
In many systems, particularly where solids are heavy and well defined, dirt accumulates as shown
above (A). When the backflush valve is open, (B), the differential pressure between the operating
pressure and the backflush system removes the dirt, all without shutting the system down. This
simple process is referred to as backflushing.
Backwashing occurs when backflushing is supplemented by fluid flowing, under pressure, in the
reverse direction into an empty strainer. This flow reversal backwashes the element and removes
the residual dirt. Backwashing is often regarded as a second step, used to remove dirt not
removed by backflushing.
STEAM JACKET OPTION:
Custom Fabricated simplex basket and tee strainers in all sizes are also available with this option.
This modification is designed to have no impact on the function or normal maintenance.
o
Steam jacketing is available in carbon steel and 316SS for service up to 450 F. Steam jacketing is
used to maintain critical fluid temperatures through the strainer. High temperatures are often
required to process and transport high viscous fluids.
11
DUPLEX STRAINERS
Two different types of covers are
available for both the Model 900 and
950. The simplest type is the bolted
cover which is cost effective and
works well in applications where basket changing is infrequent. A davit
assembly can also be specified for
larger strainers with heavy covers.
This makes it possible for a single person to remove the cover of the strainer.
20” Carbon Steel Model 950
with Bolted Covers
Duplex strainers are used when the
system flow cannot be shut down for
basket cleaning or change out. A
duplex type basket strainer can operate continuously and the pipeline
never has to be shut down.
Both the Model 900 and 950
Fabricated Duplex Strainers feature
two strainer basket housings with a
valve flow diverter assembly connecting them. When the basket in one
housing becomes full, flow is switched
to the other using the butterfly valve
assembly. The first basket is then
removed, cleaned or replaced, and is
ready for use again.
The Model 900 is available in carbon
or stainless steel in sizes from 1” to
48” and comes with either 150# or
300# flanged connections. The inlet
and outlet of the strainer are in the
same plane.
Model 950 Fabricated Duplex
Strainer designed for unique application requirements.
The Model 950 is available in carbon
or stainless steel in sizes from 1” to
48” with either 150# or 300# flanged
connections. The Model 950 has an
offset inlet and outlet, with the inlet
located above the outlet
12
If the strainer will be opened frequently for basket cleaning, a bolted cover
can be less effective because of the
time needed to remove and then
tighten the bolts. For these applications Hayward offers a special, hinged
quick opening cover that is secured
by swing bolts. This type of quick
opening cover can even be adapted
for higher pressure applications. For
medium size strainers, 8” to 16”, a
bolted slide hinge cover is available.
This permits a single operator to
engage the hinge and open the cover.
Hayward has designed a special,
unique strainer basket for the Model
900 Fabricated Strainer. The basket
has a slant top design which improves
the flow through the strainer and
results in significantly lower pressure
drops than would otherwise be the
case. The slant top design results in a
more compact basket which weighs
less than an ordinary basket and
makes it possible for a single person
to remove it from the strainer housing.
This is a real labor saving feature
when it becomes time to clean or
change out the basket. The basket for
the Model 950 has a traditional, flat
top design.
Strainer baskets for the Model 900
and 950 are made of stainless steel,
although almost any type of material
can be specified. Basket perforations
from 1/32” up to 1/2” are available and
mesh linings in sizes from 20 to 400
mesh for fine straining applications
can be specified.
MODELS 900 & 950
Typical Basket & Screen Effective Area
Strainer
Model
Pipe Size
in.
Perforation
Size - in.
Nominal Area
of Pipe (sq in)
Gross Screen
Area (sq in)
Free Area (sq in)
Ratio Free Area
to Pipe Area
900 / 950
2
5/32
3.35
78
49
1460
900 / 950
3
5/32
7.39
94
59
8.00
900 / 950
4
5/32
12.73
151
95
7.46
900 / 950
5
5/32
20.00
204
128
6.40
900 / 950
6
5/32
28.90
283
178
6.16
900 / 950
8
5/32
50.02
478
301
6.02
900 / 950
10
5/32
78.85
691
435
5.52
900 / 950
12
5/32
111.93
942
593
5.30
900 / 950
14
5/32
135.28
1320
832
6.15
900 / 950
16
5/32
176.71
1659
1045
5.91
900 / 950
18
5/32
223.68
1979
1247
5.57
900 / 950
20
5/32
277.95
2513
1583
5.70
900 / 950
24*
5/32
402.00
4071
2565
6.38
*Contact Hayward for larger sizes
Model 900 and 950 Fabricated Duplex Strainers will
meet the requirements of most duplex strainer applications. It is also easy to customize the strainers to
meet special application requirements. Often it is
thought that a custom designed duplex strainer is
required for an application. Then on examination of
the Model 900 or 950 it is found that a few simple
modifications of the basic design results in a strainer
that fits the application perfectly and at significant
cost savings over a custom design.
critical fluid temperatures through the strainer. High
temperatures are often required to process and
transport highly viscous fluids. This modification is
designed and effected without any impact on the
function or normal maintenance of the strainer.
Steam jacketing is available in carbon steel and type
316 stainless steel for service up to 450F.
Fabricated duplex strainers can also be designed
with a backflush/ backwash option. In these designs
a piping connection, with an on/off backflush valve is
fabricated at the strainer bottom and has a connection to the bottom of the strainer basket. When solids
accumulate in the bottom of the basket the backflush valve is opened and the differential pressure
between the operating pressure and the backflush
system removes the solids without shutting the system down. Backflushing is often supplemented by a
backwashing operation.
Contact us today to discuss your special
fabricated duplex strainer requirements
Hayward can design and fabricate Model 900/950
strainers to ASME section VIII and ANSI B31.1 codes.
Backwashing is done by having fluid flow, under
pressure, in the reverse direction into an empty
strainer. This flow reversal back washes the basket
and removes the residual dirt. Backwashing is often
regarded as a second step, used to remove dirt not
removed by backflushing.
Steam jacketing is another option available for fabricated strainers. Steam jacketing is used to maintain
36” Fabricated Carbon
Steel Model 950
13
DUPLEX STRAINERS
MODEL 950 DUPLEX STRAINERS
MODEL 950 150# with Bolted Cover
Size
A
B
C
D
E
F
G
H
J
K
L
M
11/2 ”
36
38
21
11
5/8
65/8
60
15
61/4
39
22
11
5/8
5/8
6
61
18
61/4
431/2
261/2
11
5/8
65/8
67
31
61/4
47
24
12
5/8
8
75
12
71/2
81/4
11
13
2”
11/16
8
11
13
3”
101/4
11
4”
13
6”
16
8”
21
1/4
13
1/2
16
21
1/4
14
17
1/2
22
25
5/8
36
3/8
38
48
1/2
60
72
1/4
1/8
1/2
5/8
571/4
32
13
5/8
103/4
92
12
8
73
44
15
5/8
14
128
15
81/2
1/2
MODEL 950 300# with Bolted Cover
Size
A
B
C
D
E
F
G
H
J
K
L
M
11/2 ”
38
381/2
21
11
5/8
65/8
60
15
61/4
39
22
11
5/8
5/8
6
61
18
61/4
85/8
121/2
131/4
2”
9
12
13
3”
117/16
4”
13
6”
181/8
171/2
8”
22
23
7/16
13/16
1/4
1/2
121/2
15
5/8
38
5/8
1/2
145/8
403/4
44
261/2
11
5/8
65/8
67
31
61/4
17
50
3/4
48
24
12
5/8
8
76
12
71/2
225/8
623/4
58
32
13
5/8
103/4
93
12
8
26
75
44
15
5/8
14
129
15
81/2
7/8
1/4
1/2
74
3/4
1/2
5/8
MODEL 950 150# with Quick Open Cover
Size
A
B
C
D
E
F
G
H
J
K
L
M
11/2 ”
39
21
11
5/8
65/8
61
15
61/4
81/4
91/2
13
36
2”
811/16
91/2
131/4
363/8
40
22
11
5/8
65/8
62
18
61/4
3”
101/4
91/2
14
38
441/2
261/2
11
5/8
65/8
68
31
61/4
4”
13
101/2
171/2
48
49
241/2
12
5/8
85/8
76
12
71/2
6”
16
13
22
57
60
32
13
5/8
103/4
95
12
8
8”
211/4
131/2
255/8
70
77
44
15
5/8
14
132
15
81/2
Consult Hayward for larger sizes. Dimensions are for reference only.
14
MODELS 900 & 950
MODEL 900
WITH
BOLTED COVER
MODEL 900 with Bolted Cover
Model 900 with Quick
Open Covers
Size
A
B
C
D
6”
635/8
223/4
351/2
23
8”
753/4
223/4
351/2
27
10”
91
24
40
31
12”
1071/2
27
45
39
14”
1181/8
29
49
39
16”
1311/8
29
53
42
18”
1391/4
30
54
42
20”
1541/4
35
65
48
24”
1691/4
35
65
53
Consult Hayward for larger sizes. Dimensions are for reference only.
Swing bolts permit covers to be
quickly opened and closed
12” Model 950 with Quick
Open Covers
15
TEE-TYPE STRAINERS
The Model 91 Fabricated
Tee Strainer is available in
carbon steel or stainless
steel with ANSI Class 150,
300, or 600 flanges or butt
weld piping connections.
Sizes are available for
pipelines from 2" up to 48".
This type of tee strainer is
typically used for pump protection or other low solids
applications.
Hayward’s Model 91 Tee
Strainer
offers
several
advantages
over
other
strainer designs. The strainer is very
compact, important in applications
where space is restricted. Unlike most
other strainers the Model 91 can be
used in both vertical or horizontal
installations. A real time saving feature
of the Model 91 Tee Strainer is that the
strainer screen can be cleaned without draining the strainer vessel.
Model 91 with quick open
cover.
In many applications the most important feature of the Model 91 is its very
low pressure drop as compared to
other types of strainers. The combination of a convoluted strainer screen
Model 91 with bolted cover.
and unrestricted flow path results in
very low pressure losses. This low
pressure drop makes it ideal for applications such as condensate and boiler feed pump suction where water
quality is good and pressure drop is
critical.
Two different types of covers are
available for the Model 91. The simplest type is the bolted cover which is
cost effective and works well in applications where basket changing is
infrequent. A davit assembly can also
be specified for larger strainers with
heavy covers. This makes it possible
for a single person to remove the
cover of the strainer.
If the strainer will be opened frequently for basket cleaning, a bolted cover
is less effective because of the time
needed to remove and then tighten
the bolts. For these applications,
Hayward offers a special, hinged,
quick-opening cover that is secured
by swing bolts. This type of quickopening cover can even be adapted
for higher pressure applications
Basket & Screen Effective Area
Strainer
Model
Pipe Size
in.
Perforation
Size - in.
Nominal Area
of Pipe (sq in)
Gross Screen
Area (sq in)
Free Area (sq in)
Ratio Free Area
to Pipe Area
3.35
23
14.26
4.26
91
2
5/32
91
3
5/32
7.39
41
25.42
3.44
91
4
5/32
12.73
58
35.96
2.82
91
5
5/32
20.00
82
50.84
2.54
91
6
5/32
28.90
105
65.10
2.25
91
8
5/32
50.02
167
103.54
2.07
91
10
5/32
78.85
234
145.08
1.84
91
12
5/32
111.93
322
199.64
1.78
91
14
5/32
135.28
419
259.78
1.92
91
16
5/32
176.71
511
316.82
1.72
91
18
5/32
223.68
639
398.18
1.77
91
20
5/32
277.95
781
484.22
1.74
91
24
5/32
402.00
1057
655.34
1.63
*Contact Hayward for larger sizes
16
MODEL 91
Strainer screens for the Model 91 are
made of stainless steel – although
almost any type of material can be
specified. Screen perforations from
1/16" up to 1/2" are available and mesh
linings in sizes from 20 to 60 mesh for
fine straining applications can be
specified. The unique convoluted
design of the strainer screen doubles
the screen area and completely
changes the dirt accumulation pattern
on the screen. This makes more
effective use of the screen’s straining
area and increases the time between
screen cleanings.
In larger sizes, because of greater
screen area, the Model 91 can be an
economical and functionally better
choice than the traditional Y strainer.
The Model 91 Fabricated Tee Strainer
will meet the requirements of most tee
strainer applications. For those that it
doesn’t it is also easy to customize
the strainer to meet special application requirements. The strainer can be
designed to meet very tight dimensional restrictions. The Model 91 can
also be adapted for straight through
or right angle flow, making it ideal for
retrofit situations in which strainers
were initially omitted.
Steam jacketing is another option
available for fabricated tee strainers.
Steam jacketing is used to maintain
critical fluid temperatures through the
strainer. High temperatures are often
required to process and transport
highly viscous fluids. This modification
is designed and effected without any
impact on the function or normal
maintenance of the strainer. Steam
jacketing is available in either carbon
steel or Type 316 stainless steel for
services of up to 450F.
Quick opening spin off cover
with davit.
Hayward can design and fabricate
Model 91 strainers to ASME section
VIII and ANSI B31.1 codes.
Model 91 with hinged cover.
17
•
•
•
•
•
Sizes from 2” to 24” - As Standard
Larger Sizes up to 48” - Available on request
Available in Carbon Steel - Stainless Steel
Flanged ANSI Class 150 and 300 - As Standard
Flanged Class 600 - Available on request
Bolted Cover
Dimensions
Butt Weld Connections
Advantages include:
• Compact design
• Vertical or horizontal installation
• Basket can be cleaned without draining
• Convoluted element design doubles the screen
area and completely changes dirt accumulation
pattern.
Quick-Opening Hinged Cover
Net Weight (lb.)
Flanged Connections
Class 150
Dimensions
Class 300
Class 150
Class 300
Class 150
Class 300
Nom
Size
A1
C
A1
C
A2
C
A2
C
E
2
5
51/4
5
61/8
10
53/4
101/2
61/8
13
4
25
8
3
6 3/4
71/8
6 3/4
75/8
121/4
71/8
13
75/8
14
9
50
4
81/4
81/8
81/4
83/4
141/4
81/8
15
83/4
16
17
5
93/4
93/8
93/4
101/8
163/4
93/8
171/2
101/8
19
6
111/4
101/8
111/4
11
181/4
101/8
19
11
8
14
121/8
14
13
22
121/8
223/4
10
17
133/4
17
15
25
133/4
12
20
153/4
20
171/8
29
14
22
173/8
22
183/4
16
24
181/2
24
18
27
205/8
20
30
24
34
Butt Weld Connections
Net Weight (lb.)
Flanged Connections
Class 150
Class 300
Class 150
Class 300
Class 150
Class 300
Nom
Size
A1
C
A1
C
A2
C
A2
C
E
38
2*
-
-
-
-
-
-
-
-
-
-
-
-
-
16
69
3*
-
-
-
-
-
-
-
-
-
-
-
-
-
75
27
115
4*
-
-
-
-
-
-
-
-
-
-
-
-
-
20
80
35
151
5*
-
-
-
-
-
-
-
-
-
-
-
-
-
22
26
110
50
206
6
111/4
91/4
111/4
91/4
181/4
91/4
19
91/4
22
5
108
5
142
13
25
45
185
81
336
8
14
111/8
14
111/8
22
111/8
223/4
111/8
25
9
156
9
208
261/4
15
29
70
324
127
491
10
17
131/2
17
131/2
25
131/2
261/4
131/2
29
12
231
12
330
153/4
301/4
171/8
31
110
410
184
730
12
20
155/8
20
155/8
29
155/8
301/4
155/8
31
15
342
15
458
32
173/8
331/4
183/4
38
131
615
236
966
14
22
171/8
22
171/8
32
171/8
331/4
171/8
38
20
435
20
610
20
34
181/2
351/2
20
41
170
776
307
1264
16
24
185/8
24
185/8
34
185/8
351/2
185/8
41
26
540
26
781
27
221/8
38
205/8
391/2
221/8
46
209
920
390
1587
18
27
211/8
27
211/8
38
211/8
391/2
211/8
46
32
660
32
990
223/8
30
237/8
413/8
223/8
423/4
237/8
51
272
1180
492
1980
20
30
235/8
30
235/8
413/8
235/8
423/4
235/8
51
40
806
40
1222
247/8
34
263/8
46
247/8
471/4
263/8
56
411
2190
594
2722
24
34
271/8
34
271/8
46
271/8
471/4
271/8
56
58
1085
58
1755
Cover Unit Cover Unit
Dimensions are in inches
These dimensions are for reference only.For installation purposes, request certified drawings.
Cover Unit Cover Unit
**
**
** Force required to lift cover in lb.
Dimensions are in inches
These dimensions are for reference only.For installation purposes, request certified drawings.
Contact Hayward for larger sizes
18
AUTOMATIC SELF-CLEANING
The Hayward automatic self-cleaning
strainer is a motorized strainer
designed for the continuous removal
of entrained solids from liquids in
pipeline systems.
It has successfully performed in
industrial, process, water, wastewater, power, paper and municipal
applications for over 30 years.
With an automated control system
monitoring the strainer operation,
cleaning is accomplished by an integral backwash system. A small portion of the screen element is isolated
and cleaned by reverse flow. The
remaining screen area continues to
strain – providing uninterrupted flow.
With this efficient design, only a small
amount of the liquid being strained is
used to carry away the debris from
the strainer.
All HAYWARD® Automatic SelfCleaning Strainers feature the idLTM
shaft seal that positively prevents
leakage from the backwash shaft at
the top of the strainer. This unique
quad seal replaces older, leak prone
packing material. With the idL seal
the exterior of the strainer stays dry
and clean in service, there's never
any bothersome external leakage or
weeping of the process media down
the sides of the strainer.
STRAINERS
APPLICATIONS
Hayward’s automatic self-cleaning
strainers are commonly used on
water service where the disposal of
debris and backwash water is not a
problem. Continuous flow is assured
and protection is provided for nozzles, pumps, valves, heat exchangers and other process equipment.
These high quality strainers can also
successfully handle other fluids such
as white water, black liquor, starch,
fuel and lubricating oil, caustic solutions and cooking oils. A determining
factor in these cases is the recycling
of the backwash fluid. HAYWARD
automatic self-cleaning strainers will
significantly reduce maintenance
costs and provide uninterrupted flow.
They are a particularly worthwhile
investment where solids loading is
high or upset conditions occur.
Frequent cleaning and servicing of
manual strainers is costly and, if not
properly done, serious disruptions to
the entire piping system can occur.
Also, they are an ideal solution for
maintenance problems where the
strainer is in an inaccessible or
remote location. Automatic strainers
can easily replace duplex basket
strainers.
Hayward offers two different Models
of Automatic Self-Cleaning Strainers,
the Model 596 and the Model 2596.
They are available in sizes of 2"
through 20” in cast construction and
6" through 60" in fabricated construction. Design and construction of
these units are in accordance with
ANSI and ASME Section VIII, Division
1. A wide range of screen designs
are offered from 1/8” perf to 400
mesh, depending on line size and
application.
10” Model 2596 strainer
19
36” Model 596 strainer
AUTOMATIC SELF-CLEANING
8” Model 596 strainer
OPERATION
The debris laden dirty fluid enters the
strainer’s large bottom chamber
where the line velocity is reduced.
Flow continues upward, passing radially through the “sealed” screen element. Unwanted material is trapped
on the inside of the screen. The flow
is uninterrupted and the strained
clean fluid continues its path into the
correctly proportioned outer annulus
of the strainer body and exits through
the outlet nozzle.
Backwash cleaning is accomplished
by utilizing the pressure differential
between line pressure and atmosphere. A hollow, full flow backwash
arm extending the full length of the
screen element rotates slowly inside
of the screen and is piped to atmosphere. The port shoe is in close proximity to the screen, and its opening is
equivalent to the “debris collector”
sections created by the convolutions
and/or the vertical collector bars in
the element.
20
STRAINERS
When cleaning is required the automatic backwash valve opens the system to atmosphere, causing a high
velocity reverse flow across the isolated section of the screen. Dirt and
debris are flushed from this segment
of the screen into the backwash arm
and out of the strainer via the backwash piping. During the backwashing
cycle the main flow is uninterrupted
and continues to be strained in the
normal manner. A manual throttling
valve is recommended after the control valve. Thus, backwash flow can
be regulated and balanced for optimum performance and reduction of
water loss.
An automatic control system consisting of an electrical panel, actuated
valves and a differential pressure
switch operates the strainer. The
cleaning cycle is set to activate on a
timed cycle with a differential pressure override to protect against system upset conditions. The control
system will automatically close the
backwash valve after the screen element is properly cleaned. The unit
can also be operated manually or in
the continuous backwash mode. See
modes of operation on page 29 for
additional information.
Cutaway of Model 596 shows backwash arm and strainer element.
TYPICAL APPLICATIONS
Automatic self-cleaning strainers are used in nearly
every industry to strain fresh, brackish or salt intake
water for plant services such as cooling, process,
fire protection, etc. They allow water to be recycled
within the plant, reducing costs.
Upper Seal
Ring
DuraWedge®
Screen Element
Process Industry: Protect heat exchangers, pumps,
valves, and water spray nozzles.
Power Industry: Protect heat exchangers, pump seal
water, and traveling screen wash water.
Clean
Strained
Fluid Outlet
Rotating Hollow
Backwash Arm
Pulp and Paper: Removing fibers from white water filtrate to prevent clogging of nozzles. Separate bark
and chips for recycling.
Debris-Laden
Fluid Inlet
Sewage/Waste and Water: Straining secondary effluent prior to discharge, and also providing clean plant
service water.
Lower Seal
Ring
Backwash Outlet
Primary Metal Industry: Provide clean water for
quenching, descaling, and blast furnace cooling.
Straining Cycle
Backwashing Cycle
;;
;;
;;
;;
;;
Vee-Shaped
Profile Wire
Strained Clean
Continuous
Flow
DuraWedge®
Screen Element
Reinforcing
Bands
Collector Bars
Top
View
Strained
Continuous
Flow
Strained Clean
Continuous
Flow
DuraWedge®
Screen Element
Reinforcing
Bands
Dirty Fluid From
Inlet Nozzle
Dirty Fluid From
Inlet Nozzle
Collector Bars
Top
View
Debris-Laden
Flow From Inlet
Rotating
Full Flow
Backwash
Arm
Reverse
Flow
Strained
Continuous
Flow
Rotating Full Flow Hollow
Backwash Arm Piped To
Atmosphere
21
;;
;;
;;
;;
;;
;;
;;
;;
Reverse Flow
DebrisLaden Flow
From Inlet
Backwash
Arm
Opened To
Atmosphere
Dirty Fluid
Discharged
Through
Backwash
Piping
Debris-Laden Fluid Carried
Away Through Backwash
Piping
AUTOMATIC STRAINERS
Model 596 Cast Strainers
Sizes 2” Thru 8”
Application Limits
Cast Iron Class 125 Flange (-20o to 150oF) 150 psi
Cast Steel Class 150 Flange (-20o to 100oF) 150 psi
Cast Steel Class 300 Flange (-20o to 150oF) 300 psi
Based on ratings of ANSI and ASME, Section VIII, Div. 1.
Lower pressure ratings at higher temperatures.
Optional Features
•Stainless steel, copper nickel,
monel, aluminum bronze and
other materials of construction.
•ASME Section VIII, Div. 1. code
stamp available.
•Flanged, screwed or socket
weld backwash connections
(steel unit only).
Pressure drop data indicates results to be
expected with clean water, under normal
flows, with standard straining media and in
clean strainer.
Approximate Dimensions (in)
Approximate Weight (lb)
150#
300#
A
B
B
C
D
E
F
G
H
J
K
L
2”
171/2
181/8
37/8
151/8
28
37 13/8
1
1
3/4
43/16
285
320
125
3”
171/2
181/8
37/8
151/8
28
37
13/8
1
1
3/4
43/16
285
320
125
4”
171/2
181/8
37/8
147/8
28
37 13/8
1
1
3/4
43/16
290
325
125
6”
28
287/8
61/8
225/8
39
50
17/8
11/4
11/2
11/8
71/2
1,200 1,375
430
8”
26
27
61/8
225/8
39
50 17/8
11/4
11/2
11/8
71/2
1,200 1,375
430
Dry Wet Cover
Dimensions are for reference only. For installation purposes, request certified drawings
Sizes 10” Thru 20”
Application Limits
Ductile Iron Class 125 Flange (-20o to 150oF) 150 psi
Cast Steel Class 300 Flange (-20o to 150oF) 300 psi
Application Limit 20” Size
Ductile Iron Class 125 Flange (-20o to 150oF) 150 psi
Based on ratings of ANSI and ASME Section VIII, Div. 1.
Lower pressure ratings at higher temperatures
Optional Features
•Stainless steel, copper nickel,
monel, aluminum bronze and
other materials of construction.
•ASME Section VIII, Div. 1. code
stamp available.
•Flanged, screwed or socket
weld backwash connections
(steel unit only).
Pressure drop data indicates results to be
expected with clean water, under normal
flows, with standard straining media and in
clean strainer.
Approximate Dimensions (in)
A
B
C
D
E
J
K
10” 381/4
193/4
353/4 643/4
90 89/16
2
7/8
1011/16 121/2
241/2
1,840 2,615
705
12” 361/4
193/4
353/4 643/4
90 89/16
2
7/8
1011/16 121/2
241/2
1,880 2,675
705
14”
44
221/16
425/16
89/16
2
7/8
107/8
131/2
295/8
2,810 4,360 1,050
16”
44
221/2
425/16 761/2 112 89/16
2
7/8
107/8 131/2
295/8
2,850 4,400 1,050
123/4
155/8
351/2
4,325 7,100 1,660
123/4 155/8
351/2
4,275 7,050 1,660
761/2
F
Approximate Weight (lb)
112
G
18”
53
26
527/16
3
11/8
20”
50
26
527/16 923/4 135 101/4 3
11/8
923/4
135
101/4
M
P
L
Dry
Wet Cover
Dimensions are for reference only. For installation purposes, request certified drawings
Specific descriptions and construction details illustrated may vary slightly from equipment furnished. We reserve the right to revise or discontinue equipment or design features without notice. We recommend that
you review performance and application data with us prior to final design.
22
TECHNICAL INFORMATION
Model 2596 Fabricated
Carbon Steel and Stainless Steel
Sizes 10” Thru 30”
Approximate Dimensions (in)
APPLICATION LIMITS
OPTIONAL FEATURES
Fabricated strainers are
designed within the limits of the
customer’s specifications and
design criteria along with any
applicable code requirement. i.e.
ASME Section Vii Div. 1.
•Stainless steel, copper nickel,
monel, aluminum bronze and
other materials of construction.
•ASME Section VIII, Div. 1. code
stamp available.
•Flanged, screwed or socket
weld backwash connections
(steel unit only).
Approximate Weight (lb)
A
B
C
D
E
F
G
H
K
L
Dry
Wet
Cover
10”
38
30
88
90
40
2
16
3/4
22.13
1,200
2,400
650
12”
42
30
88
90
40
2
18
3/4
26.13
1,300
2,700
700
14”
44
32
101
103
46
2
22
7/8
32.13
2,000
4,400
850
16”
44
33
101
103
46
2
22
7/8
32.13
2,050
4,450
850
18”
50
36
117
120
48
3
23
7/8
34.13
3,500
8,300
1,280
20”
54
37
120
123
50
3
25
7/8
38.13
3,700
10,000
1,480
24”
54
39
124
127
54
3
25
7/8
38.13
3,830
10,160
1,480
30”
64
51
147
151
76
3
30
7/8
48.13
5,000
13,400
2,000
Pressure drop data indicates results to be
expected with clean water, under normal
flows, with standard straining media and in
clean strainer.
Note: K= Diameter Bolt Hole (4) Required 90o Apart, L= Diameter Bolt Circle
Dimensions are for reference only. For installation purposes, request certified drawings
Sizes 36” Thru 48”
Approximate Dimensions (in)
A
B
C
36”
90
60
D
E
F
1033/4 1485/8 182
48” 1091/4 623/4 122
177
227
APPLICATION LIMITS
OPTIONAL FEATURES
Fabricated strainers are
designed within the limits of the
customer’s specifications and
design criteria along with any
applicable code requirement. i.e.
ASME Section Vii Div. 1.
•Stainless steel, copper nickel,
monel, aluminum bronze and
other materials of construction.
•ASME Section VIII, Div. 1. code
stamp available.
•Flanged, screwed or socket
weld backwash connections
(steel unit only).
Approximate Weight (lb)
G
H
J
K
L
M
P
723/4
40
6
13/8
66
8
14 14,000 29,530 4,500
80
483/4
8
11/2
90
8
13 24,000 53,000 8,000
Dry
Wet
Cover
Note: J=Backwash Outlet Flange Size, K= Diameter Bolt Hole (4) Required 90o Apart, L= Diameter Bolt Circle
Dimensions are for reference only. For installation purposes, request certified drawings
Pressure drop data indicates results to be
expected with clean water, under normal
flows, with standard straining media and in
clean strainer.
Specific descriptions and construction details illustrated may vary slightly from equipment furnished. We reserve the right to revise or discontinue equipment or design features without notice. We recommend
that you review performance and application data with us prior to final design.
23
LOW-DIFFERENTIAL PRESSURE
The Hayward Model 596LDP, in 6"
through 30" sizes has been specifically designed for systems with line pressures less than 20 psi.
DESIGN AND OPERATION
The Model 596LDP configuration is
similar to the standard self-cleaning
strainer. However, it incorporates an
external flushing arm which is
attached to the same shaft and motor
that drives the regular backwash arm.
The two components rotate synchronously.
The external backwash flushing arm
directs a high velocity flow of liquid
directly onto the back side of the
straining element, dislodging the
debris, which then flows out the backwash outlet. The action is a “pushpull” effect since the backwash arm is
open to atmosphere.
The external backwash fluid should be
at a minimum 20 psi greater than the
system operating pressure.
This
backwash fluid can be city water,
plant service water or a side stream
taken from the pressure side of the
strainer line. In remote locations, a
small booster pump will do the job.
The automatic control system monitors the operation of the strainer. The
cleaning cycle is set to activate on a
timed cycle with a differential pressure
override to protect against system
upset conditions. See modes of operation on page 29 for additional information.
The external backwash inlet valve is
opened at the same time as the backwash outlet valve, initiating the backwash cycle. Only a small amount of
external backwash fluid is required.
This is an extremely effective method
of dislodging dirt from the screen element. Continuous flow is maintained
at all times.
A Model LDP installed in a piping system
APPLICATIONS
Irrigation water where low head pressure is commonly
encountered.
Fire protections/general service water from ponds and lakes.
Cooling water for commercial buildings on suction side of pumps.
Secondary effluent in treatment plants for spray nozzles and
service water.
Intake cooling water for power plants and industrial plants from
rivers, bays, etc. where head variations occur.
24
AUTOMATIC STRAINER
FEATURES
QUALITY OF CONSTRUCTION
Designed and constructed in general accordance with ANSI and ASME Section VIII, Division
1. Code Stamp is available.
Rotating External
Backwash Arm
MATERIALS OF CONSTRUCTION
Cast iron in 6" and 8”, 10" and larger in fabricated carbon or stainless steel. Flanged connections, ANSI 125# or 150#. Other materials available.
External
Backwash
Inlet
DuraWedge
Screen
Element
®
COMPACT DESIGN
Incorporates unitized modular design feature.
Motor, gear reducer, cover and complete internal
operating mechanism lift off as a unit for ease of
inspection and maintenance. This greatly simplifies maintenance and reduces cost compared to
other automatic strainer designs.
Previously, self-cleaning strainers had to be
located where line pressures were above 20 psi.
Now, with the HAYWARD® Strain-O-Matic
596LDP, they can be utilized with line pressure
below 20 psi and can be placed in more convenient locations – even on the suction side of a
pump. Thus, pumping equipment is also protected from damage by entrained debris.
Rotating
Internal
Backwash
Arm
Backwash
Outlet
Consult Hayward for other low system
pressure options.
Top View of External Backwash
Flow
High velocity external backwash is directed
across the screen. Dirt, fibers, and debris
are dislodged and carried into the backwash arm and flushed away through the
backwash outlet.
25
SCREEN ELEMENTS
DuraWedge Element
Convoluted Element
DuraWedge® is a non-clogging, rugged stainless
steel straining element constructed from veeshaped profile wire. Available only from Hayward.
This is a sturdy, economical stainless steel element for general service use. It is ideal in applications where leaves, twigs and large amounts of
miscellaneous debris are encountered.
The generous spaces created by the convolutions
provide an area for the debris to collect. “Packing”
does not occur due to the gradual contoured
shape of the convolutions.
During backwashing the debris is easily dislodged
and carried away through the backwash arm and
out of the strainer.
®
Features
•Two point contact straining from the “smooth”
side prevents plugging or packing of debris and
particles.
•Effective dislodging of dirt, debris and fibers
from the element during backwash. This is
accomplished by the increased velocity of the
reverse flow (during backwash) from the “open
side” of the vee.
•Fiber stapling is reduced because of smooth
Features
•Circumferential reinforcing bands for added
surfaces and the design contour of the profile
wire.
resistance to pressure and flexing ensures long
service life.
•Vertical collector bars form spaces to accumulate debris and dirt, preventing snow plowing of
materials by the rotating backwash arm and
port shoe.
•Cartridge design for easy removal and cleaning.
•No bypass. Elements are sealed.
•Longer service life. All-welded design with circumferential reinforcing bands provides structural integrity.
•Convoluted sections are individually isolated by
the port shoe during backwash for increased
cleaning efficiency.
•No snow plowing. Convoluted profile provides
collection spaces for debris.
•Extended area design offered only by Hayward
•No bypass
•Sinterbonded mesh available - A Hayward
exclusive.
STANDARD OPENINGS
STANDARD OPENINGS
DuraWedge Element
Convoluted Perf Element
Model 596 - All Sizes - 1/16, 1/32, 0.015”
Model 596 - All Sizes - 1/8”, 1/16, 1/32
Model 2596 - 10” to 16” - 1/8”, 1/16”, 1/32”,
0.015”. 0.009”
Model 2596 - 10” to 16” - 1/8”, 1/16, 1/32
Model 2596 - 18” to 24” - 3/16”, 1/8”, 1/16”,
1/32”, 0.015”, 0.009”
Model 2596 - 18” to 24” - 5/32”, 1/8”, 1/16”
Convoluted Mesh Element
Model 596 - All Sizes - 40 mesh (0.015”),
60 mesh (0.009”), 80 mesh (0.007”)
Model 2596 - All Sizes - 40 mesh (0.015”),
60 mesh (0.009”), 80 mesh (0.007”)
Note:Screen element selection is important. A smaller than required opening will reduce the efficiency of the system.
Please contact Hayward for prompt expert assistance to ensure proper element/strainer selection.
26
SELF-CLEANING STRAINER
COMPONENTS
Features:
Typical Model 596
Quality Construction
HAYWARD® Automatic Self-Cleaning Strainers are
designed and constructed in general accordance
with ANSI and ASME Section VIIII, Division 1. A
Code Stamp is available. Seismic qualification is
also available.
idLTM Seal
Hayward's unique idL shaft seal replaces older
style packing and prevents troublesome leakage.
This special quad seal means that the strainer
always stays dry and clean in service with no
process media leaking down the sides of the
strainer.
Ease of Maintenance
Unitized modular assembly – the motor, gear
reducer, cover and complete internal operating
mechanism lift off as a unit, making all components
easily accessible. This greatly simplifies maintenance and reduces costs.
Low Backwash Fluid Requirements
Due to the efficient hydraulic design of the backwash system.
1
2
3
4
Entire
Assembly
Lifts Off as a
Unit, for
Ease of
Maintenance
and
Inspection.
5
6
7
8
9
10
Material of Construction
Cast 2" through 20" in iron, ductile iron, carbon and
stainless steel, Ni-resist, aluminum bronze.
Fabricated 6" through 60" in carbon steel, stainless
steel, Monel, and copper nickel.
11
12
13
Choice of Screen Elements
To suit the particular service – Dura-Wedge,
Perforated or Mesh elements.
14
Minimal Power Consumption
1/3 HP drive motor in 2" through 8" Model 596, 1/4
HP in 10" through 16" Model 2596. 1/3 HP in 18"
through 24", 1/2 HP in 30", 1 HP in 36" to 42", and
2 HP in 48" through 60".
15
16
No Dirty Fluid Bypass
”Sealed End” cartridge screen element seat in
close tolerance machined retained rings.
1 Extended Shaft for Manual
Tight, Simple Cover Seat
O-ring design permits resealing without time-consuming gasket replacements and adjustment.
3 idL
Manual Operation if Required
Utilizing extended shaft.
6 Upper Seal Retaining Ring
Operation
2 Low H.P. Motor / Heavy Duty
Gear Reducer
TM
Shaft Seal
4 O-Ring Cover Seal
5 Full-Flow Backwash Arm with
Adjustable Port Shoe
7 Sealed End Cap Ring
8 DuraWedge® Stainless Steel
Element
9 Sealed End Cap Ring
27
10 Lower Seal Retaining Ring
11 Composite Bearing
12 Bearing Collar
13 Retaining Ring
14 Strain-O-Matic® Body, Designed
and Constructed in Accordance
with ANSI & ASME Sec. VIII
15 Backwash Outlet
16 Inlet with Large Bottom
Chamber,Reduces Flow Velocity
17 Mounting Feet for Ease of
Installation
APPLICATION CONSIDERATIONS
Straining Elements
Pressure and Temperature
Hayward offers three kinds of straining elements: convoluted perforated plates, convoluted sinter-bonded
mesh and DuraWedge .
•Model 596 Cast Iron and Model 2596 Ductile Iron
are rated at 150 psi @ 150 F.
TM
For coarse straining applications, such as raw water
intakes from lakes, ponds and streams, the convoluted perforated elements will perform well and offer the
most economical unit pricing.
On other applications, where pre-screening of the fluid
has already been performed, but finer filtering of the
fluids is desired, then the sinter-bonded mesh element
may be selected.
•Fabricated Units are rated at 150 psi @ 150 F,
however other ratings are available, consult Hayward.
•For the Models 596 and 2596 the minimum operating pressure is 20 PSIG.
•For 596LDP Models the minimum operating pressure
is 5 -10 PSIG depending on the application.
On applications where fibrous materials will be
encountered in the fluid being strained, then a
DuraWedge element may help to minimize the impact
of the fibers stapling to the screen.
®
Standard available opening sizes are shown on page
26. The rule of thumb in determining the opening size
is to be 1/2 of whatever opening is being protected.
Debris
Cleaning of the straining element is accomplished by
utilizing the pressure differential between line pressure
and atmosphere. When the backwash valve is opened
to atmosphere during the cleaning cycle, a portion of
the strained fluid reverses flow back across the section
of element being cleaned, lifts off the debris, and
ejects the debris out of the strainer.
Sticky or greasy debris are more difficult to backwash
and may require longer backwash cycle durations.
Sand, dirt and pipe scale should backwash easily. The
quantity of debris coming into the strainer can also be
a problem. Insure that the volume of the suspended
solids does not exceed 200 ppm or 0.02 percent. If the
application requires heavier loading than this, consult
Hayward.
Backwash Requirements
The quantity of fluid required to clean a straining element is dependent upon the type and quantity of
debris. Under normal conditions, approximately 5 percent of the line flow will be used for cleaning of the
straining element during the cleaning cycle. The loss of
fluid through the backwash can be minimized by
adding a manual throttling valve downstream of the
automated valve.
24” Model 2596 strainer.
28
CONTROL SYSTEMS
Design and Operation
Modes of Operation
Hayward® Automatic Control Systems (ACS) are
specifically designed to monitor and operate the backwash cleaning system of
Hayward Automatic Strainers.
They are simple to operate,
reliable and easily maintained.
The design allows field adjustments to suit the demands of
the service conditions, ensuring effective cleaning with a
minimum
use
of
backwash fluid.
By operating the selector switch, the controls can be
easily switched to either of two modes: automatic
intermittent or continuous backwashing.
The automatic intermittent mode is adjustable by setting the timer in the panel that controls the frequency
of backwashing and the “open” time of the backwash
valve. The settings will depend on the individual installation. Predicting average times is difficult because
conditions vary. Experience will dictate the optimal settings. Field adjustments should be made to suit the
application.
Three basic systems,
ACS-1, ACS-2 and
ACS-3 are available.
Optional designs to
meet specific requirements with special wiring
arrangements, panel boxes (NEMA 7, 9), control
valves, and air actuation among others, can be furnished.
ACS-1 Standard Control System Components
This system features a NEMA 4 rated (water and dust
tight) panel box complete with adjustable timer, differential pressure override, 10 amp control relay for backwash valve activation, display lights to indicate Power
On – Backwash Valve Open – and High Differential
Pressure. A selector switch is also included to manually control the backwash valve functions of Off or OnAuto. The panel also has contact terminals for a motor
starter and an external alarm connection. The panel
requires 110 VAC input and is CSA approved, UL
approval is available as an option. The panel has a differential pressure switch and an electrically-actuated
ball valve that controls the backwash function. With
Model 596LPD for low pressure systems, an electrically-operated butterfly valve is included to control the
external source of cleaning water.
ACS-2 Standard Control System Components
This system has all of the features of the ACS-1 and
includes a motor starter in addition to the other standard equipment.
ACS-3 Standard Control System Components
This system has all of the features of the ASC-2 system and includes a 460V/120V dual voltage transformer.
The differential pressure switch must also be set. Two
PSID above the clean reading is the setting recommended. This switch will compensate for sudden high
loadings by overriding the time cycle and initiating
backwash should the differential pressure rise above
the programmed setting. A secondary delay timer will
continue the cleaning for 60 seconds beyond that
point. The time delay can be varied from 1 to 150 seconds.
The continuous backwashing mode is positive, efficient
and practical where the backwashing fluid can be
recycled to its source. It is also desirable, and sometimes necessary, to use this mode when very high solid
loadings are encountered.
This mode is initiated by placing the backwash switch
on the panel in the “on” position. Manual operation of
the system can be controlled with this switch, opening
or closing the backwash valve as desired. Returning it
to “auto” will restore the intermittent cycling as set.
In both the automatic intermittent and continuous
backwashing modes the backwash arm continuously
rotates at a low 2 -4 RPM.
Differential Pressure Switch
A diaphragm-type differential pressure switch is a
standard component in all Control Systems. It provides
protection for the strainer and element, initiating backwash should a high differential pressure occur
between timed cleaning intervals.
Backwash Valve
Electrically actuated (115 VAC/60 Hz) ball valves are
also standard in the Control Systems. Materials of construction are suitable for water service. Other materials, valve types and pneumatic actuation are optional.
Backwash Valve Sizes
Motors
An electric motor and gear box are furnished as part of
the strainer. The standard TEFC motor is 120/220V,
Single phase 60Hz, or 230/460V Three Phase 60 Hz, at
customer option. Other motors are available.
29
Strainer
Size
Valve
Size
2”, 3”, 4”
6”, 8”
1”
11/2”
10 thru 20” 24”, 30”
3”
4”
36”, 42”
48”
6”
8”
AUTOMATIC STRAINER
SIZING
Basic Guidelines
Standard Design Parameters
1. Insure that the pipeline flow velocity falls within the
standard design range of the strainer.
1. Self-cleaning strainers have a design flow range
where the unit will best perform its two main functions,straining and self-cleaning.
2. Select the correct screen and opening size, don’t
make smaller than necessary.
2. Inlet flow velocity to the strainer should be in the 6
to 10 feet per minute range. There may be applications
where the operating flow will fall outside the normal
design range. When this occurs, please contact
Hayward for recommendations.
3. The quantity, type and nature of debris to be
removed are considered.
4. The strainer meets the design pressure and temperature requirements of the pipeline.
3. Minimum operating pressure is 20 PSI for standard
units, 5-10 PSI for LDP units depending on the application.
5. Backwash line should discharge to atmosphere in
close proximity to the strainer.
4. Suspended solids should not exceed 200 PPM or
0.02% of volume. For heavier loadings consult
Hayward.
SUSPENDED SOLIDS SIZING CHART
AND CONVERSION TABLE
STRAINER SIZING CHART
STANDARD
DESIGN RANGE
PPM
10000
8000
100000
80000
60000
40000
LB /
1000 GAL
%
1.0
.8
6000
.6
4000
.4
2000
.2
1000
800
.1
.08
600
.06
400
.04
8"
200
.02
6"
100
80
60
.01
.008
.006
40
.004
20
.002
10
8
6
.001
.0008
.0006
4
.0004
2
.0002
1.0
.0001
48"
80
60
40
36"
20000
24"
10000
8000
20"
6000
16"
4000
14"
12"
2000
10"
1000
800
600
400
4"
200
3"
100
80
10
8
6
4
2
STANDARD DESIGN RANGE
FLOW – GALLONS PER MINUTE
20
30"
2"
60
40
20
1
.8
.6
.4
.2
.1
.08
.06
.04
.02
10
1
2
3
4
5
6
7
8
9
10
11
VELOCITY – FEET PER SECOND
30
.01
.0083
AUTOMATIC STRAINER
SAMPLE SPEC
Design
Materials of Construction
1. The Automatic self-cleaning Strainer shall be a
Hayward Strain-O-Matic® Model 596 or 2596.
The strainer body shall be (iron, carbon steel, stainless
steel, bronze) and shall be appropriate for the service
conditions.
2. Strainer Design Parameters:
Strainer Inlet Size ______ in.
Flow Rate___________ GPM
Working Pressure __________ PSI (Min. 20 PSI)
Design Pressure ___________ PSI
Design Temperature _________°F
Max. Allowable Pressure Drop ______ PSID
Solids Loading ______ PPM
Design shall be in general accordance with ANSI and
ASME Sec. VIII Division 1.
3. For ease of maintenance the strainer shall be
designed so the entire operating assembly, motor,
gear reducer, cover, backwash arm assembly, bearing
housing and element lift from the strainer body as a
complete unit.
4. For backwashing efficiency the entire open area of
the backwash port opening shall be in close proximity
to the full length of the screen section being backwashed. Additionally, the entire backwash arm shall
have a full-flow opening throughout the entire passage
to the backwash piping. The backwash arm shall not
contact or scrape the screen at any point.
All components shall be of ASTM designed materials
suitable for the service conditions and consistent with
good engineering practice.
Control System
The system shall be capable of automatically controlling and monitoring the strainer's operation.
The system shall have the following components.
The motor shall be a low HP TEFC single-phase
110/220V or three-phase 230/460V with a gear reducer to drive the backwash shaft.
A NEMA 4 control panel shall be furnished with three
indicator lights (Power On, Backwash valve Open and
High differential Pressure); a 3-position selector switch
(Off-On-Auto) to control the backwashing cycle; and
contacts for external alarm. (Motor starter and/or
transformer are optional as specified).
A diaphragm-type differential pressure switch is to be
provided that shall be capable of initiating backwashing at a set differential pressure.
Screen Element
An electrically actuated ball valve shall be provided to
control the backwash flow.
1. Media Design parameters (check one):
Type:
___ DuraWedgeTM media (vee-shaped profile wire)
___ Convoluted
___ Convoluted Sinterbonded
Low Differential Pressure Model
For line pressures below 20 PSI or for suction service,
specify Strain-O-Matic Strainer Model 596LDP (Low
Differential Pressure) design.
Opening Size:
Inches ____ , Mesh Equivalent ____ , Microns ____
2. The element shall be a one-piece cartridge design
for ease of removal and cleaning.
3. The element shall have stainless steel “cap rings” at
both ends to prevent bypass of dirty fluid. Reinforcing
circumferential bands shall also be provided for structural strength.
31
AUTOMATIC STRAINER
APPLICATION WORKSHEET
Self-Cleaning Strainers
GENERAL
SERVICE APPLICATION:
MARKET CODE: (CHECK ONE)
INDUSTRIAL
MUNICIPAL
POWER
PETROLEUM
LIQUID TO BE STRAINED:
SPECIFIC GRAVITY
, VISCOSITY (CPS/SSU)
, TEMP. (°F)
FLOW CONDITIONS
, MAXIMUM
FLOW (GPM):
OPERATING PRESSURE (PSI):
, MINIMUM
, VEL (FT./SEC)
, NORMAL
OPERATING TEMPERATURE (°F):
, DESIGN
, NORMAL
, MINIMUM
, DESIGN
MAX. ALLOWABLE PRESS. DROP (PSI) CLEAN
, MINIMUM
, DIRTY
CONTAMINANT
, HARD
SOLIDS TO BE REMOVED:
PPM,
SOLIDS CONCENTRATION:
ELEMENT:
PERFORATED
STICKY
%WT,
MICRONS OR
PARTICLE SIZE:
SOFT
FIBROUS
% VOLUME
INCHES
MESH
DURAWEDGE® ELEMENT
STRAINER CONSTRUCTION
MODEL 2596:
MODEL 596:
CAST DUCTILE
CAST IRON
CAST BRONZE
FAB STEEL
CAST STEEL
FAB STEEL
FAB STAINLESS
CAST STAINLESS
FAB STAINLESS.
PIPELINE SIZE (INCHES):
END CONNECTIONS:
FLANGED
125#
150#
OTHER
MOTOR
FRAME:
POWER SUPPLY:
TEFC
120V, 1 PH, 60 HZ
TENV
OTHER
230/460 V, 3 PH, 60 HZ,
OTHER
SPECIAL COMMENTS:
CONTROL PACKAGE
TYPE:
ACS-1
ACS-2
ACS-3
SPECIAL REQUIREMENTS OR OPTIONS:
SUBMITTALS (CHECK IF REQUIRED)
APPROVAL PRINTS
HYDRO TEST REPORTS,
CERTIFIED PRINTS,
OTHER
CHEMICAL/PHYSICAL CERTIFICATIONS
OTHER SPECIFICATIONS/REQUIREMENTS:
32
FABRICATED STRAINER
APPLICATION WORKSHEET
Simplex, Duplex and Y Strainers
LIQUID TO BE STRAINED
SPECIFIC GRAVITY
, VISCOSITY (CPS/SSU),
TEMP. (°F)
FLOW CONDITIONS
FLOW (GPM):
, MAXIMUM
STEAM OR GAS FLOW:
, MINIMUM
, VEL (FT./SEC)
, STD CU FT/MIN (SCFM)
, OR LB/HR
,
(GIVE MINIMUM WORKING PRESSURE FOR GAS APPLICATIONS)
, NORMAL
OPERATING PRESSURE (PSI):
OPERATING TEMPERATURE (°F):
, DESIGN
, NORMAL
, MINIMUM
, DESIGN
MAX. ALLOWABLE PRESSURE DROP: CLEAN
PSI, DIRTY
, MINIMUM
PSI
CAN FLOW BASKET BE INTERRUPTED TO CLEAN STRAINER BASKET?
YES
NO
CONTAMINANT
SOLIDS TO BE REMOVED:
, ARE THEY?
PPM,
SOLIDS CONCENTRATION:
MICRONS OR
PARTICLE SIZE:
HARD
SOFT
%WT,
STICKY
FIBROUS
% VOLUME
INCHES
MESH OR PERFORATION
STRAINER CONSTRUCTION
BODY COVER:
STAINLESS STEEL CARBON STEEL
OTHER SPECIFY
PIPE SIZE (INCHES):
END CONNECTIONS: THREADED SOCKET WELD
O-RING MATERIAL:
ANSI
VITON®
150 LB
BUNA-N
BUTT WELD
300LB
600LB
OTHER
FLANGED
OTHER
SPECIAL FEATURES REQUIRED
DIFFERENTIAL PRESSURE GAUGE SWITCH
DRAIN VALVE
PAINTING
COATING
BOLTED COVERS
VENT VALVE
QUICK OPENING
SUPPORT LEGS:
SUBMITTALS (CHECK IF REQUIRED)
APPROVAL PRINTS
HYDRO TEST REPORTS,
CERTIFIED PRINTS,
CHEMICAL/PHYSICAL CERTIFICATIONS
COMPLIANCE CERTIFICATIONS
SHOCK/VIBRATION TEST
OTHER SPECIFICATIONS/REQUIREMENTS:
The data contained in this publication are correct to the best of our knowledge. However, we do not assume any liability for the accuracy or completeness of such
data. The final determination of suitability of product information, use intended, manners of that is, or infringement of patents, is the responsibility of the user.
33
TECHNICAL DATA
FLOW CONVERSION
FACTORS
M3/hr = 3.671 I.G.M.
I.G.P.M. = 41.14 Barrels/Day
T.P.H. = 3.74 I.G.M.
I.G.P.M. = 1.2 U.S. G.P.M.
I.G.P.M. = 4.54 Liters/Min
FLOW VELOCITY
CONVERSION FACTORS
LITER/MIN = 0.22 I.G.P.M.
U.S. G.P.M. = 0.833 I.G.P.M.
Barrel = 35 Imp. Gallons
Velocity in Ft/Sec =
Barrel = 42 U.S.Gallons
GPM X 0.4085
ID2 in Inches
VOLUME CONVERSION FACTORS
To Obtain:
Multiply By:
U.S.
Gallon
Imperial
Gallon
U.S.
Pint
U.S. Gallon
Imperial Gallon
U.S. Pint
1
1.2009
0.125
0.833
1
0.1041
8.0
9.60752
1
8.337
10.0
1.042
0.11995
7.48052
0.004329
0.1
6.22888
0.00361
0.9596
59.8442
0.034632
2.113423
2113.34
U.S. Pound Water
U.S. Cubic Foot
U.S. Cubic Inch
Liter
Cubic Meter
0.2641779 0.2199756
264.170
219.969
U.S.Pound U.S. Cubic
Water
Foot
U.S. Cubic
Inch
Liter
Cubic
Meter
0.13368
0.16054
0.01671
231.0
277.42
28.875
3.78533
4.54596
0.473168
0.003785
0.004546
0.000473
1
62.365
0.03609
0.016035
1
0.0005787
27.708
1728.0
1
0.45405
28.31702
0.016387
0.00454
0.028317
0.0000164
2.202
2202
0.0353154
35.31446
61.02509
61023.38
1
999.972
0.001000
1
To convert from one unit to another, locate the starting unit in the left hand column. Multiply by the factor shown horizontally to the right under the desired unit.
PRESSURE CONVERSION FACTORS
To Obtain:
Multiply By:
Pounds/Sq. In
Pounds/Sq. Ft.
Atmosphere
Kilogram/Sq. Cm.
Inch Water
Foot Water
Inch Mercury
mm Mercury
Bar
Pound
Sq. In.
Pound
Sq. Ft.
1
0.0069545
14.696
144.0
1
2116.22
0.068046 0.070307
0.000473 0.000488
1
1.0332
14.2233
0.03607
0.43278
2048.16
5.194
62.3205
0.96784
0.002454
0.029449
0.49115
0.019337
14.5038
Atmosphere Kilogram
Sq. Cm.
1
0.00254
0.03043
70.726
0.033421 0.03453
2.7845 0.0013158 0.0013595
2088.55
0.98692
1.0197
Inch
Water
Foot
Water
Inch
Mercury
mm
Mercury
Bar
27.7276
0.1926
407.484
2.3106
0.01605
33.9570
2.0360
0.014139
29.921
51.7150
0.35913
760.0
0.06895
0.000479
1.01325
394.27
1
12.0
32.864
0.08333
1
28.959
0.0734
0.8811
735.558
1.865
22.381
0.9807
0.00249
0.02984
13.617
0.5361
33.51
1.1349
0.04468
402.1
1
0.03937
29.53
25.40
1
750.0
0.03386
0.001333
1
To convert from one unit to another, locate the starting unit in the left hand column. Multiply by the factor shown horizontally to the right under the desired unit.
34
VISCOSITY
EQUIVALENTS
SSU
(Saybolt seconds
Universal)
Centipoise
Engler
Degrees
20oC
Redwood
Standard
30
1
–
–
50
5
2
44
100
20
3.5
88
200
40
16
175
300
65
30
263
400
85
43
350
500
105
57
440
600
130
72
525
700
150
90
615
800
175
115
700
900
195
132
790
1000
210
150
880
2000
425
350
1750
3000
625
540
2600
4000
860
740
3500
5000
1050
930
4550
6000
1300
1120
5250
7000
1500
1320
6150
8000
1700
1510
7300
9000
1920
–
–
10000
2150
–
–
STRAINER BASKET OPENING EQUIVALENTS
Mesh
Inches
Millimeters
Microns
Perf
Inches
Millimeters
Microns
400
0.0015
0.0381
38
1/32
0.033
0.838
838
300
0.0018
0.0457
45
3/64
0.045
1.143
1143
250
0.0024
0.0609
60
1/16
0.070
1.778
1776
200
0.0027
0.0686
68
3/32
0.094
2.387
2387
150
0.0041
0.1041
104
1/8
0.125
3.175
3175
100
0.0065
0.1651
165
5/32
0.150
3.810
3810
80
0.007
0.1778
177
3/16
0.1875
4.762
4762
60
0.009
0.2286
228
1/4
0.250
6.350
6350
40
0.015
0.8636
380
3/8
0.375
9.525
9525
20
0.034
0.8636
862
1/2
0.500
12.700
12700
35
MORE FROM
HAYWARD FILTRATION
Pipeline Strainers
“Industry Standard” for over 100
Don’t trust anything less than a filter
years. Nobody knows more about
bag from Hayward. They're made
Hayward provides the most com-
gas/liquid separation than Hayward.
under ISO 9001:2000 standards to
plete
cast
WRIGHT-AUSTIN, Gas/Liquid Separators
ensure the consistent, reliable perfor-
pipeline strainers for coarse filtra-
are used to remove 99% of damage
mance that you demand. HAYWARD
tion available from any manufactur-
causing moisture and particulate mat-
Filter Bags fit all HAYWARD Filter
er. These include Simplex, Duplex
ter from air, gas and steam pipelines.
Vessels…and the vessels of most other
and
Iron,
They protect valuable system compo-
manufacturers as well.
Bronze, Carbon Steel and Stainless
nents like air compressors and tur-
Steel. For ultra-pure or highly cor-
bines.
range
Y
of
Type
standard
Strainers
in
Find out more on the web at:
rosive applications, strainers of all
www.haywardindustrial.com.
plastic construction are available.
Hayward has a wide selection with
Pipeline strainers range in sizes
hundreds of different WRIGHT-AUSTIN
from 1/2” to 36”.
Gas/Liquid Separators. When a stan-
Unlike fabricated strainers, it is not
possible to change the design of
standard cast pipeline strainers.
However, cast strainers are available with a large number of options
dard model isn’t right for an application, Hayward Engineers can work
with customers to create a custom
fabricated model that fits the applications requirements exactly.
which allows them to be cus-
Find out more on the web at:
tomized to meet specific applica-
www.haywardindustrial.com.
tion requirements, if necessary.
Standard cast strainers are normally available for immediate shipment
direct from our stock of over 11,000
different model numbers.
Filtration Systems
With HAYWARD® Filter Vessels you have
your choice of high grade investment
Hayward has the perfect strainer
cast construction or engineered fabricat-
for
applications.
ed construction in stainless steel or car-
When there is damage causing dirt
bon steel. Or, for extremely corrosive or
or
pipelines,
ultra-pure services, you can choose all-
Hayward has the pipeline strainer
plastic construction. You can be sure
to remove it.
your HAYWARD Filter Vessel will meet
any
straining
debris
in
liquid
specifications because they are all made
Find out more on the web at:
to ISO9001:2000 Standards. Hayward
www.haywardindustrial.com.
has representatives in over 40 countries,
experienced professionals to provide the
Gas/Liquid
Separators
filtration help you need…when and where
Hayward’s WRIGHT-AUSTINTM brand
Choosing the correct filter bag is critical
Gas/Liquid Separators have been the
to the success of your application.
you need it.
36
INTERACTIVE
STRAINER SELECTOR
AUTOCAD AND
ENGINEERING
DRAWINGS
LEARN MORE
ABOUT PIPELINE
STRAINERS
Select the right strainer for your
application with just a few
mouse clicks. See how different
strainer basket perforation and
mesh sizes affect pressure
drop.
If you have AutoCAD software
you can download AutoCAD
files for most of our pipeline
strainers. For those without
AutoCAD, engineering drawings
are available in Acrobat Reader
format.
There’s lots of good information
about how to use pipeline
strainers and what to look out
for in various applications in the
Library section of our web site.
To get there, click “Metal
Pipeline Strainers” from the
home page menu. Next, click
on “Pipeline Strainers”, then
click on the strainer model you
are interested in and scroll
down to and click “Design
Aids-Pressure Loss
Calculator” button.
To access these files, just
click on “Metal Pipeline
Strainers” from the home
page menu, then click on the
strainer model you are interested in. Next, click the blue
“Dimensional Drawings” button on the left, under the
strainer photo.
To access helpful application
information in the Library, click
on “Metal Pipeline Strainers”
from the home page and then
click on “Library.”
And Don’t Forget To Add
WWW.HAYWARDINDUSTRIAL.COM
To Your Browser’s “Favorites” List For Easy Access In The Future
HAYWARD
®
manufacturer of
HAYWARD Industrial Products, Inc.
Headquarters NORTH AMERICA
HAYWARD Industrial Products, Inc.
900 Fairmount Avenue
Elizabeth, NJ 07207, USA
Tel.
+ 1.908 .351 .54 00
Fax
+ 1 .908 .351 .78 93
E-mail [email protected]
www.haywardindustrial.com
CUSTOMER SERVICE
United States
Tel.
1-800-859-9212
Fax
1-908-351-7893
Headquarters EUROPE, MIDDLE EAST and
AFRICA
Hayward Industrial Products GmbH
Auf der Heide 2
53947 Nettersheim
Germany
Tel.
+ 49.24 86 .809 .0
Fax
+ 49 .24 86 .809 .800
E-mail [email protected]
www.haywardindustrial.com
Headquarters SOUTH AMERICA
Hayward Industrial Products do Brasil Ltda.
Rua Padre Roque, 2084
Bairro da Saude, Mogí Mirim/SP
CEP: 13800-335 Brazil
Tel.
+ 55 .19 .38 05 .8200
Fax
+ 55 .19 .38 05 .8201
E-mail [email protected]
www.haywardindustrial.com
Headquarters ASIA and PACIFIC
Hayward Industrial Products Asia Pte. Ltd.
11 Chang Charn Road
#05-02 Shriro House
Singapore 159640
Tel.
+ 65 .64 52 .09 55
Fax
+ 65 .64 52 .11 32
E-mail [email protected]
www.haywardindustrial.com
GAF®, the GAF logo®, ACCUGAF™, DURAGAF™, PROGAF™, and GAF SNAP-RING® are registered trademarks of GAF Corporation in the United States and are used under license. To the best of our knowledge,
although not binding for us, all stated information is correct.
Copyright ©2004 HAYWARD Industrial Products, Inc. All rights reserved.
FAB-12 3/04
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