44
Control systems Pressure reducing/surplussing valves
Pressure/temperature limits
DP27, DP27E, DP27R and DP27Y
DP27G and DP27GY
D
A
B
F G
F
F
F
Steam saturation curve
C
E
G
E
Pressure bar g
Pressure bar g
The product must not be used in this region. A-D-E Screwed and flanged EN 1092 PN25, ASME 300 and BS 10 Table H. A-B-C Flanged ASME 150.
F-F-E The DP27G and DP27GY are limited to 120 °C. G-G The DP27E is limited to 10 bar g @ 190 °C.
Note: A variable rate conical pressure adjustment spring is fitted providing a downstream pressure range of 0.2 - 17 bar g. For the DP27Y downstream pressure range is 0.2 - 3 bar g.
4.6 166
Body design conditions
PN25
A-D-E
25 bar g @ 120 °C
Maximum design pressure
A-B-C
17.2 bar g @ 40 °C
Maximum design temperature
232 °C @ 21 bar g
Minimum design temperature
-10 °C
DP27 , DP27R and DP27Y
17 bar g
Maximum upstream pressure for saturated steam service For ASME 150, see A-B-C above
DP27E
10 bar g
DP27G and DP27GY
Maximum upstream pressure for compressed air and inert industrial gas service
25 bar g
DP27, DP27Y
232 °C @ 21 bar g
Maximum operating temperature For ASME 150, see A-B-C above
DP27E
190 °C @ 10 bar g
DP27G, DP27GY
120 °C @ 25 bar g
Minimum operating temperature Note: For lower operating temperatures consult Spirax Sarco
0 °C
DP27 , DP27R and DP27Y
17 bar
DP27G and DP27GY
Maximum differential pressure
25 bar g
DP27E
10 bar
Designed for a maximum cold hydraulic test pressure of:
38 bar g
Note: With internals fitted, test pressure must not exceed:
25 bar g
TI-P470-01 CTLS Issue 13
Page 2 of 16
DP27, DP27E, DP27G, DP27GY, DP27R & DP27Y Pilot Operated Pressure Reducing Valves with SG Iron Bodies
Powered by FlippingBook