Combination Pressure/Temperature Regulator 1/2" to 4" 25PT

Combination Pressure/Temperature Regulator 1/2" to 4" 25PT
Combination Pressure/Temperature Regulator
1/2" to 4" 25PT
The 25PT eliminates the need for
a separate pressure regulator and
a temperature regulator. Normal
operation is controlled by the temperature pilot, and the pressure
pilot sets an upper limit on the
downstream steam pressure. The
temperature pilot has a calibrated
dial for accurate temperature setting, and is available with a variety
of solid-fill sensing bulbs (See TIS
1.1123). The standard capillary
tubing length is 8 feet, with an
optional standard length of 15 feet.
Model
Sizes
1/2" to 2"
Connections
Typical Applications
25PT
2-1/2", 3", 4" 1/2" to 2" 2", 2-1/2", 3", 4"
NPT ANSI 125 flgd.
Construction
NPT
Cast Iron ANSI 300 flgd.
Cast Steel
Options
ANSI 250 flgd. ANSI150flgd.
(excludes 2")
Non-Standard capillary tubing length (see TIS 1.1123)
Capacities
Limiting Operating Conditions
Max. Operating Pressure (PMO)
Max. Operating Temperature
NPT:
ANSI
ANSI
ANSI
ANSI
125:
250:
150:
300:
250
125
250
185
300
psig
psig
psig
psig
psig
Storage steam water heaters, instantaneous heat exchangers and converters,
air handling coils, tank heating coils,
steam jacketed vessels, steam chests,
molds and platens, and other temperature control applications where it is necessary or desirable to set an upper limit
on the delivered steam pressure.
(17 barg)
( 8 barg)
(17 barg)
(12 barg)
(20 barg)
The regulator is sized according to the
temperature control requirements. For
selection and sizing, see TI-1-1124-US.
F
@ 450˚F (232˚C)
@ 450˚F (232˚C) 1/4" NPT Sensing
@ 450˚F (232˚C) Line Conncetion
@ 450˚F (232˚C)
@ 450˚F (232˚C)
F
450˚F (232˚C)
C
*The temperature of the sensing bulb must not exceed 350˚F (177˚C)
Standard Temperature Ranges
30˚F to 90˚F
60˚F to 120˚F
100˚F to 160˚F
120˚F to 180˚F
0˚C
15˚C
40˚C
50˚C
C
to 32˚C
to 50˚C 160˚F to 220˚F 70˚C to 105˚C
to 70˚C 200˚F to 260˚F 95˚C to 125˚C
to 80˚C 260˚F to 320˚F 125˚C to160˚C
E
E
Downstream Pressure Ranges
Yellow: 3 to 30 psi
Blue: 20 to 100 psi
A1
D
For the following downstream pressures, three color-coded pilot
valve springs are available:
D
Red: 80 to 290 psi
Pressure Shell Design Conditions
B
PMA
Cast Iron:
250 psig/0-450˚F 17 barg/0-232˚C
Max. allowabl
pressure
A
Cast Steel: 600˚F/0-300 psig 316˚C/0-21 barg
B
TMA
Cast Iron:
450˚F/0-250 psig 232˚C/0-17 barg
Max. allowable
temperature
Sample Specification
Pressure/Temperature Regulators shall be of the pilotactuated, diaphragm-operated type with separate pressure and temperature pilots. The main valve shall be
single-seated, with hardened stainless steel trim; the
regulator shall be cast iron (cast steel). The pilots shall
be removable without disturbing the control connections.
The temperature setting shall be adjustable without the
use of tools, and the set point shall be indicated on a
calibrated dial. The thermostatic system shall be solid fill,
and shall incorporate overheat protection. The regulator
shall be capable of dead-end shut-off.
2"* to 4"
1/2" to 2"
Dimensions
(nominal) in inches and millimeters
Ansi 125 Ansi 250
Ansi 300 Weight
Size A
A1
A1
B
C
D
E
F Cast Iron Cast Steel
1/2", 3/4" 5.5
140
–
–
–
–
7.6
194
13.25
337
6.2
157
19.4
494
5.0
127
38 lb 17.2 kg
41 lb
18.6 kg
1"
6.0
152
–
–
–
–
8.6
219
13.2
335
6.75
171
19.9
506
5.0
127
45 lb
20.4 kg
49 lb
22.2 kg
1-1/4", 1-1/2" 7.25
184
–
–
–
–
8.6
219
13.75
349
7.1
179
20.8
529
5.0
127
50.5 lb
22.9 kg
55 lb
25.0 kg
8.5
216
–
–
9.0
228
10.6
270
14.4
365
8.2
208
22.6
573
5.0
127
75 lb
34 kg
82 lb
37.2 kg
2-1/2"
–
_
10.9
276
11.5
292
13.6
346
15.1
383
13.9
354
29.0
737
5.0
127
163.5 lb
74.2 kg
178 lb
80.7 kg
3"
–
–
11.75
298
12.5
318
13.6
346
15.0
381
14.4
367
29.4
748
5.0
127
194.5lb
88.2 kg
212 lb
96.2 kg
–
–
13.9
352
14.5
368
15.6
397
16.3
414
16.1
410
32.4
824
5.0
127
290.5 lb
132 kg
316 lb
143 kg
2"
4"
Local regulation may restrict the use of this product below the conditions quoted. Limiting conditions refer to standard connections only.
TI-3-017-US 4.12
In the interests of development and improvement of the product, we reserve the right to change the specification.
Combination Pressure/Temperature Regulator
1/2" to 4" 25PT
43
43
38
44
36
38
32
48
33
34
29
37
31
30
58
63
53
48
50
49
47
58
67
60
44
38
36
46
45
64
65
35
48
32
33
34
29
30
37
9
8
10
12
11
3
2
11
13
7
1
4
5
6
66
25
18
15
19
21
23
24
Stainless Steel
Stainless Steel
Brass 1/2" - 2"
Steel 2"* - 4"
Cast Iron
Cast Steel
Brass 1/2" - 2"
C.I. 2"* - 4"
Stainless Steel
CRS
Stainless Steel
Copper
Brass
Brass
Steel
Stainless Steel
1/2" - 2" Copper Clad
2"* - 4" Graphite
Cast Iron
Cast Steel
Stainless Steel
Stainless Steel
Phenolic
AISI 303
ASTM A 126 CL B
ASTM A216 Gr WCB
33
Pointer
34
Extension Nut
35
Case Tube
36
Retaining Nut
37
Pilot Mounting Screws
38
Capillary Tube
39
Bulb
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
52
Spring Retainer Cup
53
Retaining Ring
54
Pilot Seat
55 Pilot Head
56
Head Stem
57
Stem Guide
58
Stem Guide Gasket
59
Seat Gasket
60
Pilot Gasket
61
Pilot Mounting Screws
62
Diaphragm Case Screws
63
"T" Pilot Adapter
64
Adapter Pipe
65
"P" Pilot Adapter
66
Adapter Stud
67
Adapter Nut
22
20
2"* to 4"
*ANSI 300 ONLY
Stainless Steel
Brass
Brass
Brass
Steel
Varies with style selected
Varies with style selected
Stainless Steel
Brass
Steel
Cast Iron
Cast Steel
Cast Iron
Cast Steel
Steel
ASTM A569
Stainless Steel
Brass
Stainless Steel
Stainless Steel
Brass
Stainless Steel
Stainless Steel
Stainless Steel
Stainless Steel
Stainless Steel
Stainless Steel
Graphite
Steel
ASTM A449
Steel
Brass
Steel
Ductile Iron
Cast Steel
Steel
Steel
Installation
ASTM A 126 CL B
ASTM A216 Gr WCB
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 thermostatic bulb must be carefully located in the medium being heated. The
pressure sensing line may be located either in the downstream piping
or in the steam space. 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 and TI-3-0271-US.
Spirax Sarco, Inc., 1150 Northpoint Blvd, Blythewood, SC 29016
TI-3-017-US 4.12
Telephone: (803) 714-2000 FAX (803) 714-2222
© Spirax Sarco, Inc. 2012
17
Diaphragm Plate Stem
18
Diaphragm Stem Guide
19
Nut
20
Lower Diaphragm Case
21
Diaphragm Plate
22
Main Diaphragm (2 ply)
23Bushing
24
Tube & Orifice
25
Tubing Assembly
26
Plug (Cast Iron)
(Cast Steel)
27
Connector Stud
28
Body Gasket
29
Pilot Valve Body
30
Pilot Valve Seat
31
Pilot Valve Head
32
Adjustment Knob
ASTM A 126 CL B
ASTM A216 Gr WCB
ASTM A 126 CL B
ASTM A216 Gr WCB
ASTM A449
2
13
7
1
4
5
17
26
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 1/2"-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
(2-1/2" - 4" Cast Steel only)
39
51
3
16
28
27
19
15
21
22
20
Construction Materials
47
49
14
25
25
1/2" to 2"
48
46
45
53
50
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