Direct Operated Pressure Regulator 25MP

Direct Operated Pressure Regulator 25MP
Regulators
Direct Operated
Pressure
Direct Operated Pressure Regulator
25MP
The 25MP is a
direct acting steam
pressure reducing
valve. Downstream
pressure is fed back
through an external
sensing line.
Typical Applications
Model Sizes
Connections
Construction
25MP
Small steam pressure reducing applications where an
80% to 90% accuracy of regulation is acceptable.
½"
5
NPT Cast Iron
6
19
8
18
7
4
8
10
14
3
9
15
16
2
17
13
11
12
1
Construction Materials
No. 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15 16
17
18
19
Part Body
Lower Diaphragm Housing
Diaphragm Bolts
Upper Case Diaphragm
Adjustment Screw
Jam Nut
Adjustment Spring
Spring Plate
Diaphragm Plate
Diaphragm Stem
Valve Head
Valve Seat
Stem Guide
Stem Guide Gasket
Pilot Valve Spring
Pilot Valve Assy. Gasket
Cover Plate
Retaining Ring
Material
Cast Iron
Cast Iron
Steel
Cast Iron
Stainless Steel
Brass
Carbon Steel
Steel
Brass
Phosphor Bronze
Stainless Steel
Stainless Steel
Stainless Steel
Stainless Steel
Stainless Steel
Stainless Steel
Graphite
Stainless Steel
Brass
ASTM A 126 CL B
ASTM A 126 CL B
ASTM A449
ASTM A 126 CL B
AISI 300 series
ASTM B16
AISI 1060
ASTM A 569
ASTM 36(260)
ASTM B 103 Alloy A
AISI 303
AISI 440A
400 Series STN Steel
AISI 303
AISI 302
AISI 302
AISI 302
AISI 300 Series
ASTM B 36
B
C
Limiting Operating Conditions
Max. Operating Pressure (PMO)
Max. Operating Temperature ¼" NPT
250 psig (17 barg)
450˚F (232˚C)
Sensing Line
Connection
Downstream Pressure Ranges
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
0.2 to 2.8 bar
2.8 to 10.3 bar 10.3 to 13.8 bar
A
Dimensions
(nominal) in inches and millimeters
Weight
Size A
B
C
½" 3.5
89
4.9
125
9.75
248
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.
1: 38
9.75 lb
4.45 kg
TI-3-104-US
5.09
Regulators
Direct Operated Pressure Regulator
25MP
Inlet Steam Reduced Steam Pressure
Pressure
psig 2
5
10
15
20
30
40
50
60
bar
.14
.34
.69
1.03
1.38
2.07
2.76
3.45
4.14
15
1.03
8
10
15
30
2.07
12
18
27
31
33
50
3.45
15
20
30
37
46
50
57
75
5.17
17
23
48
59
73
74
78
73
72
100
6.89
19
39
56
70
85
93
110
92
98
125
8.62
68
85
102
118
122
116
125
150
10.3
85
105
124
139
139
139
142
175
12.1
97
123
140
159
163
150
159
200
13.8
114
137
160
182
188
173
187
250
17.2
137
164
192
218
226
224
228
300
20.6
185
210
245
270
260
265
for kg/hr, multiply by .454
75
5.17
100
6.89
125
8.62
150
10.3
175
12.1
200
13.8
94
128
145
162
191
230
272
119
143
164
194
233
275
139
162
197
232
216
157
190
234
280
167
222
280
210
275
Direct Operated
Pressure
Capacity – Pounds of saturated steam per hour at 80% accuracy of regulation
Spare Parts
Capacity & Accuracy of Regulation
Capacity of the type MP regulator is based upon the accuracy of
regulation of the reduced pressure, and chart values are given for
an accuracy of regulation of 80%. This means that, for example,
at a reduction of 100 psi to 20 psi, the capacity will be 85 lbs/
hr when the reduced pressure drops to 80% of the 20 psi initial
setting or 16 psi.
G4
B4
A4
The following multipliers can be used to determine the capacity
for other percent of accuracy of regulation values.
Capacity Chart Multiplier
1.25
1.0
0.75
0.5
F4
H4
K4
J4
Sample Specification
The pressure regulator shall be direct-acting with an external
pressure sensing line. The valve trim shall be hardened stainless
steel, and the body shall be cast iron.
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, or in the steam space.
Maintenance
Complete installation and maintenance instructions are given in
IM-3-104-US, a copy of which is supplied with each valve.
L4
B
M4
N4
W
T4
S4
Cover Plate w/ Retaining Ring
Pilot Screws w/ Gasket
Adjustment Screw w/ Nut, and Upper
and Lower Spring Support Disc
Adjustment Spring
A4, B4
B, W
G4, H4
J4
K4
Diaphragm Assembly
Stem Guide w/ Gasket
Head & Seat Assembly w/ Gasket Square Gasket for all Pilots (set of 3)
L4
M4, N4
S4, T4
W
Specify controlled pressure and spring color
Yellow 3 to 30 psi
Blue
20 to 100 psi
Red
80 to 250 psi
TI-3-104-US
Spirax Sarco, Inc., 1150 Northpoint Blvd, Blythewood, SC 29016
© Spirax Sarco, Inc. 2009
Accuracy of Regulation 75%
80%
85%
90%
5.09
Telephone: (803) 714-2000 FAX (803) 714-2222
1: 39
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