44
Control systems Pressure reducing/surplussing valves
Temperature ranges Range A 16 °C to 49 °C
Range B 38 °C to 71 °C
Range C 49 °C to 82 °C
Range D 71 °C to 104 °C
Range E 93 °C to 127 °C
Sizes and pipe connections DN15LC - Low Capacity version, DN15, DN20, DN25, DN32, DN40 and DN50 screwed BSP (BS 21 parallel) or NPT (DN15 to DN25 only). Standard flanges: DN15 - DN50 EN 1092 PN25 DN25 - DN50 BS 10 Table H and ANSI 300 Available on request: DN15 - DN50 JIS 10, JIS 16 and ANSI 150 DN15 - DN20 BS 10 Table F DN15 ANSI 300
Pressure/temperature limits
D
A
B
G
Steam saturation curve
C
E
G
Pressure bar g
4.6 154
The product must not be used in this region. A-D-E Screwed and flanged EN 1092 PN25, ANSI 300, and BS 10 Table H. A-B-C Flanged ANSI 150. G-G The DP27TE is limited to 10 bar g @ 190 °C.
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
DP27T
17 bar g
Maximum upstream pressure for saturated steam service
DP27TE
10 bar g
DP27T
232 °C @ 17 bar g
Maximum operating temperature
DP27TE
190 °C @ 10 bar g
Minimum operating temperature Note: For lower operating temperatures consult Spirax Sarco
0 °C
DP27T
17 bar
Maximum differential pressure
DP27TE
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-P470-08 CTLS Issue 5
Page 2 of 12
DP27T and DP27TE Pilot Operated Pressure/Temperature Control Valves with SG Iron Bodies
Powered by FlippingBook