Pilot Operated Pressure Regulators 1/2" to 4" 25P

Pilot Operated Pressure Regulators 1/2" to 4" 25P
Pilot Operated Pressure Regulator
½" to 4" 25P
The 25P is a self-actuated pilotoperated pressure regulator.
Downstream pressure is fed
back through an external sensing line to the pressure pilot,
which adjusts the opening of the
main valve so as to maintain the
set pressure. The main valve can
close tight for ANSI/FCI 70-2
Class IV shut off when steam is
not required.
Model Sizes
Connections
2½", 3", 4"
NPT 2", 2½", 3", 4"
NPT
ANSI 300 flgd.
ANSI 125 flgd.
Cast Iron Construction
Options
ANSI 250 flgd.
The 25P is a reliable, accurate regulator to reduce steam from a high supply
pressure to the most efficient operating pressure of the equipment, and to
protect the equipment from dangerously high pressures.
Cast Steel
Capacities
ANSI 150 flgd.
125
450
For selection and sizing data,
see TIS 3.030.
(excludes 2")
232
rve
cu
sa
am
Ste
200
ANSI 125
100
149
93
Temperature ˚C
ion
at
tur
NPT+ ANSI 250
300
0
200
100
150
(14)
(7)
Pressure psig (barg)
50
250
38
140
600
E
For the following downstream
pressures, three color-coded
pilot valve springs are
available:
Yellow: 3 to 30 psi
Blue: 20 to 100 psi
Red: 80 to 250 psi
300
(20)
The product should not be used in shaded area.
Cast Steel
C
Downstream
Pressure
Ranges
1
15
A
1/4"
NPT Sensing
Line
Connection
204
400
D
B
315
500
450
on
ati
c
204
149
Temperature ˚C
300
e
urv
NPT+ ANSI 300
260
400
Temperature ˚F
½" to 2" 1/2" to 2"
Cast Iron
Temperature ˚F
½" to 2"
Typical Applications
25P
Dimensions (nominal) in inches and millimeters
A1
A1
B
C
D
E
Cast Iron
½", ¾" 5.5
140
–
–
–
–
7.6
194
12.2
310
6.2
157
18.4
467
32 lb
14.5 kg
1"
6.0
152
–
–
–
–
8.6
219
12.1
308
6.75
171
18.9
479
39 lb
17.7 kg
43 lb
19.5 kg
1¼", 1½"
7.25
184
–
–
–
–
8.6
219
12.7
322
7.1
179
19.75
502
44 lb
20 kg
48 lb
21.8 kg
2"
8.5
216
–
–
9.0
228
10.6
270
13.3
338
8.2
208
21.5
546
69 lb 31.3 kg
75 lb
34 kg
2½"
–
_
10.9
276
11.5
292
13.6
346
14.0
356
13.9
354
27.9
710
157 lb
71.2 kg
171 lb
77.6 kg
For operation in this region, stainless steel transmission tubing need be fitted.
3"
–
–
11.75
298
12.5
318
13.6
346
13.9
354
14.4
367
28.4
721
188 lb
85.3 kg
205 lb
93 kg
Note: Maximum temperature for Stainless Steel tubing is 600°F
–
–
13.9
352
14.5
368
15.6
397
15.25
387
16.1
410
31.4
797
284 lb
129 kg
309 lb
140 kg
am
200
100
Ste
tur
sa
93
ANSI 150
38
1
50 100 150 200 250
300 350
0
(14)
(20)
(7)
285
Pressure psig (barg)
The product should not be used in shaded area.
15
Size
4"
A
ANSI 125 ANSI 250
ANSI 150 ANSI 300
Weight
Local regulation may restrict the use of this product below the conditions quoted. Limiting conditions refer to standard connections only.
In the interests of development and improvement of the product, we reserve the right to change the specification.
Cast Steel
35 lb
15.9 kg
TI-3-015-US
4.12
Pilot Operated Pressure Regulator
½" to 4" 25P
43
Sample Specification
The pressure regulator shall be of the
pilot-actuated diaphragm operated type.
The main valve shall be single-seated with
hardened stainless steel trim; the regulator body shall be cast iron (cast steel). The
pilot shall be bolted directly to the regulator body. The regulator shall be capable
of dead-end shut-off.
44
48
45
62
50
49
48
47
A1
51
61
C
for pilot, see
½" to 2"
46
3
60
2
11
13
7
1
4
5
6
25
F
D
25
28
16
17
28
27
19
18
15
19
20
2"* to 4"
2
13
7
1
4
5
14
9
8
10
12
11
25
15
21
22
B
3
60
24
26
½" to 2"
21
22
23
20
2"* to 4" *ANSI 300 ONLY
Construction Materials
No. ASTM A 126 CL B
ASTM A216 Gr WCB
ASTM A 126 CL B
ASTM A216 Gr WCB
ASTM A449
ASTM A 126 CL B
ASTM A216 Gr WCB
ASTM A 126 CL B
ASTM A216 Gr WCB
Part 26
Plug (Cast Iron)
(Cast Steel)
27
Connector Stud
28
Body Gasket
43
Adjustment Screw
44
Jam Nut
45
Pilot Valve Spring
46
Upper Diaphragm Case
47
Lower Diaphragm Case
48
Spring Plate
49
Diaphragm
50
Diaphragm Plate
51 Pilot Head Spring
60
Pilot Gasket
61
Pilot Mounting Screws
62
Diaphragm Case Screws
Material
Brass
Steel
Stainless Steel
½" - 2" Copper Clad
2"* - 4" Graphite
Stainless Steel
Brass
Steel
Cast Iron
Cast Steel
Cast Iron
Cast Steel
Steel
Stainless Steel
Brass
Stainless Steel
Graphite
Steel
Steel ASTM A 126 CL B
ASTM A216 Gr WCB
ASTM A 126 CL B
ASTM A216 Gr WCB
ASTM A449
Installation
The regulator should be installed in a horizontal line with suitable
bypass and isolating valves. A steam trap should be installed
upstream to prevent condensate from reaching the regulator. The
trap and regulator should both be protected with a strainer. The
pressure sensing line should be located in a straight section of
the downstream piping at least 10 pipe diameters from the nearest
fitting. Complete installation instructions are given in IM-3-000-US.
Maintenance
Complete installation and maintenance instructions are given in
IM-3-000-US, a copy of which is supplied with each regulator.
Available spare parts are shown on TI-1-1120-US & TI-3-0271-US.
Spirax Sarco, Inc., 1150 Northpoint Blvd, Blythewood, SC 29016
TI-3-015-US
Telephone: (803) 714-2000 FAX (803) 714-2222
4.12
© Spirax Sarco, Inc. 2012
No. Part Material
1
Valve Body
Cast Iron
Cast Steel
2
Cover
Cast Iron
Cast Steel
3
Cover Bolts
Steel
4
Main Valve Head
Stainless Steel
5
Main Valve Seat
Stainless Steel
6
Main Valve Seat GasketCopper
7
Valve Return Spring
Stainless Steel
8
Valve Stem
Stainless Steel
9
Strainer Screen
Stainless Steel
10
Valve Stem Sleeve
Stainless Steel
11
Spring Guide
Cast Iron ½"-2"
CRS 2"* - 4" 12Nut
Steel
13
Cover Gasket
Graphite
14
Pressure Equalizer Pipe
Stainless Steel
15 Upper Diaphragm Case
Cast Iron
Cast Steel
16
Stem Bushing
Stainless Steel
(2½" - 4" Cast Steel only)
17
Diaphragm Plate Stem
Stainless Steel
18
Diaphragm Stem Guide
Stainless Steel
19Nut
Brass ½" - 2"
Steel 2"* - 4"
20
Lower Diaphragm Case
Cast Iron
Cast Steel
21
Diaphragm Plate
Brass ½" - 2"
C.I. 2"* - 4" 22
Main Diaphragm (2 ply)
Stainless Steel
23Bushing
CRS
24
Tube & Orifice
Stainless Steel
25
Tubing Assembly
Copper
Brass
(optional for cast steel)
Stainless Steel
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