Pipeline ancillaries Disc, split disc and wafer check valves
10
Materials
No.Part
Material
1 Body
Bronze
WS 2.1050
Austenitic stainless steel Austenitic stainless steel Austenitic stainless steel Austenitic stainless steel
2 Disc
ASTM A276 316
3 Spring retainer
BS 1449 316 S11
Standard spring
BS 2056 316 S42
4
Heavy duty spring
BS 2056 316 S42
3 4 2 1
Pressure/temperature limits
Steam saturation curve
Pressure bar g
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.
7.5.3
The product must not be used in this region.
Body design conditions for saturated steam service
PN16
PMA Maximum allowable pressure
16 bar g @ 120 °C
TMA Maximum allowable temperature
260 °C @ 7 bar g
Minimum allowable temperature
-198 °C
PMO Maximum operating pressure for saturated steam service
13.2 bar g @ 196 °C
10.5 6
TMO Maximum operating temperature
260 °C @ 7 bar g
Minimum operating temperature Note: For lower operating temperatures consult Spirax Sarco
-198 °C
Viton seat
-25 °C to +205 °C
Temperature limits
EPDM seat
-40 °C to +120 °C
Designed for a maximum cold hydraulic test pressure of
24 bar g
TI-P134-05 CMGT Issue 11
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DCV1 Disc Check Valve
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