401-SH/501-SH Series Inverted Bucket Steam Traps

401-SH/501-SH Series Inverted Bucket Steam Traps
401-SH/501-SH Series Inverted Bucket Superheat Steam Trap
Carbon Steel or Stainless Steel for Vertical Installation
Steam Trapping and
Steam Tracing Equipment
For Pressures to 1,540 psig (105 bar)...Capacities to 950 lb/hr (432 kg/hr)
B
B
D
D
A
A
C
C
Model 401-SH
Model 501-SH
Description
Armstrong’s 401-SH/501-SH Series inverted bucket steam trap line is
made for overcoming the difficult combination of superheat and high
pressure/low load service.
To survive this most severe steam service, Armstrong created an inverted
bucket trap with a unique accumulation chamber. The chamber collects
sufficient condensate to ensure full discharge cycles. A cup in the chamber
floats up and down on the steam inlet tube, sealing it off as the condensate
level rises. At the same time as the chamber collects condensate, steam
continues to flow under the bucket, making sure that the discharge valve
closes tightly until the condensate rises into the trap body and the bucket
falls down. The operation is on/off, no throttling or dribbling.
Furthermore, it combines all the advantages of an inverted bucket steam trap:
• High resistance to wear, corrosion and water hammer with no gaskets.
• A unique leverage system multiplies the force provided by the bucket,
to open the valve against system pressure.
• The mechanism is located at the top. No dirt can collect on the orifice.
Small particles of dirt will be held in suspension until discharged by the full
differential purging action.
• The discharge orifice is surrounded by a water seal, preventing live steam
loss. Automatic air venting is provided by a small hole in the bucket.
• Inverted bucket traps require no adjustment. They do not allow condensate
backup and are resistant to water hammer.
Maximum Operating Conditions
Body:
Model 401-SH
Model 501-SH
Internals:
Valve and seat:
Connections:
Model 401-SH Model 501-SH
Carbon steel ASTM A106 Gr. B Sch. 80 pipe
Stainless steel 316L ASTM A312 Sch. 80 pipe
Stainless steel—304
Titanium
Stainless steel—304
Stainless steel—316L
Specification
Inverted bucket steam trap, type ... in carbon steel (stainless steel), with
accumulation chamber, continuous air venting at steam temperature, stainless
steel leverage system, with the discharge orifice at the top of the trap.
How to Order
Specify:
• Model number
• Size and type of pipe connection. When flanges are required, specify type
of flange in detail
• Maximum working pressure that will be encountered or orifice size
For a fully detailed certified drawing, refer to:
401-SH CD #1011
501-SH CD #1012
401-SH and 501-SH Series Steam Traps
Maximum allowable pressure (vessel design):
Model 401-SH: 1,000 psig @ 800°F (69 bar @ 427°C)
Model 501-SH: 1,540 psig @ 850°F (105 bar @ 454°C)
Model
401-SH
in
Pipe Connections
Maximum operating pressure:
Model 401-SH: 1,000 psig
Model 501-SH: 1,540 psig
“A” Diameter (NPT, BSPT or SW)
“B” Height (NPT, BSPT or SW)
Connections
Screwed NPT and BSPT (401-SH only)
Socketweld
Flanged
See page 185 for dimensional information for flanged and socketweld
connections.
92
Materials
mm
1/2, 3/4 15, 20
4
100
11
275
“C” Diameter (Flanged)*
4-5/8
117
“D” Height (Flanged)*
15-1/8
384
501-SH
in
mm
in
1/2
15
3/4
20
4
100
4
100
13-9/16
344
5-1/8
130
13-9/16 344
4-3/4
121
mm
18-3/16 462 18-11/16 475
Weight NPT, BSPT or SW lb (kg)
12 (5.5)
15 (7)
Weight Flanged lb (kg)
15 (6.7)
29 (13)
*401-SH 600 lb RF shown. 501-SH 900/1500 lb RF shown.
Designs, materials, weights and performance ratings are approximate and subject to change without notice. Visit armstronginternational.com for up-to-date information.
North America • Latin America • India • Europe / Middle East / Africa • China • Pacific Rim
armstronginternational.com
401-SH/501-SH Series Inverted Bucket Superheat Steam Trap
Carbon Steel or Stainless Steel for Vertical Installation
For Pressures to 1,540 psig (105 bar)...Capacities to 950 lb/hr (432 kg/hr)
Model 401/501 Capacity
7
10
Pressure, bar
2
3
7
5
100
1,200
1,000
500
1,540
400
1,000
700
Correctly
Sized
250
Capacity lb/hr
Incorrectly
Sized
500
200
400
150
300
250
100
200
70
150
Drip Leg Sizing
The properly sized drip leg will capture condensate. Too small a drip leg can actually
cause a venturi “piccolo” effect where pressure drop pulls condensate out of the drip
leg and trap.
501-SH
401-SH
300
100
Capacity kg/hr
What little condensate there is on superheat and high pressure/low load
service usually forms in drip legs and in the traps themselves. Therefore
proper piping and drip legs of adequate size and diameter are essential
for the successful operation of the Armstrong superheat trap.
Steam Trapping and
Steam Tracing Equipment
Installation Recommendations
50
100
2
3
5
7
1,000
2
Pressure, psi
M
Recommended Steam Main and Branch Line Drip Leg Tracing
M
D
Steam Main Size
H
in
1/2
3/4
1
2
3
4
6
8
10
12
14
16
18
20
24
Trap Draining Drip Leg on Steam Main
KEY
Air
Steam
D
Condensate
mm
15
20
25
50
75
100
150
200
250
300
350
400
450
500
600
H Drip Leg Length Minimum
Supervised WarmDrip Leg Diameter
Up
in
mm
in
mm
1/2
15
10
250
3/4
20
10
250
1
25
10
250
2
50
10
250
3
75
10
250
4
100
10
250
4
100
10
250
4
100
12
300
6
150
15
380
6
150
18
450
8
200
21
530
8
200
24
600
10
250
27
685
10
250
30
760
12
300
36
910
Automatic WarmUp
in
mm
28
710
28
710
28
710
28
710
28
710
28
710
28
710
28
710
28
710
28
710
28
710
28
710
28
710
30
760
36
910
Trap
Chamber
Cup
Accumulation
Chamber
Steam
Tube
Condensate
Tube
Cycling—Discharge Valve Wide Open
With the steam feed tube to the trap chamber
sealed, condensate flows through the
condensate feed tube (from accumulation
chamber) into the trap chamber. This
sinks the inverted bucket, which opens
the discharge valve, cycling the trap.
Cycle Ending
As the level of condensate in the accumulation chamber falls, the cup sealing
the steam feed tube moves downward,
opening a passage for steam to flow
into trap chamber.
Trap Closed
As steam begins to flow through
the accumulation chamber and up
the steam feed tube under the inverted
bucket in the trap chamber, the
discharge valve closes tightly.
Cycle About to Repeat
As the level of condensate rises in the
accumulation chamber, the cup floats
up until it again seals the steam feed
tube, and the cycle repeats.
Designs, materials, weights and performance ratings are approximate and subject to change without notice. Visit armstronginternational.com for up-to-date information.
Next
North America • Latin America • India • Europe / Middle East / Africa • China • Pacific Rim
armstronginternational.com
93
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement