Pipeline ancillaries Disc, split disc and wafer check valves
10
Materials
No. Part
Material
Austenitic stainless steel Austenitic stainless steel Austenitic stainless steel Austenitic stainless steel
1
Body
ASTM A351 CF3M
2
Disc
ASTM A276 316
3
Spring retainer
BS 1449 316 S11
Standard spring
BS 2056 316 S42
4
High temperature spring
Nickel alloy
Nimonic 90
1
4 2 3
Pressure/temperature limits
Pressure psi g
0
145
290
435
580
725
752 572 392 212 32 -20.2
B
A E
The product must not be used in this region. A-B-D High temperature spring and without spring. E-C-D Standard spring. Please note: The figures displayed are only relevant when a metal-to-metal seat is used. If Viton or EPDM seats are used the product is restricted to the limits of the seat material chosen.
C
Steam saturation curve
D
Pressure bar g
7.5.11
Body design conditions for saturated steam service
ASME 300
PMA Maximum allowable pressure
49 bar g @ 37 °C 711 psi g @ 98.6 °F
TMA Maximum allowable temperature
400 °C @ 29 bar g
752 °F @ 421 psi g
Minimum allowable temperature
-29 °C
-20.2 °F
PMO Maximum operating pressure for saturated steam service
34 bar g @ 243 °C
493 psi g @ 469 °F
Standard spring
300 °C @ 31.5 bar g
572 °F @ 457 psi g
TMO Maximum operating temperature
High temperature spring
400 °C @ 29 bar g
752 °F @ 421 psi g
10.5 16
Without spring
Minimum operating temperature Note: For lower operating temperatures consult Spirax Sarco
-29 °C
-20.2 °F
Viton seat
-25 °C to +205 °C
-13 °F to +401 °F
Temperature limits
EPDM seat
-40 °C to +120 °C
-40 °F to +248 °F
Product is safe for use under full vacuum conditions Designed for a maximum cold hydraulic test pressure of
76 bar g
1102 psi g
TI-P134-04 CMGT Issue 16
Page 2 of 5
DCV4 Disc Check Valve
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