Pipeline ancillaries Disc, split disc and wafer check valves
10
Pressure/temperature limits
-10 0 100 200 300 400
E A
B
C
Steam saturation curve
D
0
5 10152025303540
Pressure bar g
The product must not be used in this region. For use in this area use a DCV6 with high temperature spring or DCV6 without spring.
A - B-D Screwed, socket weld, butt weld and flanged ANSI 300. A - C-D Flanged EN 1092 PN40.
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.
Body design conditions
PN40
PMA Maximum allowable pressure
40 bar g @ 50 °C
TMA Maximum allowable temperature
400 °C @ 22.4 bar g
Minimum allowable temperature
-10 °C
PMO Maximum operating pressure for saturated steam service
40 bar g @ 50 °C
Standard spring
300 °C @ 33.3 bar g
Heavy duty spring
300 °C @ 33.3 bar g
TMO Maximum operating temperature
High temperature spring
400 °C @ 31.2 bar g
400 ° C @ 31.2 bar g
Without spring
-10 ° C
Minimum operating temperature
7.5.20
Note: For lower operating temperatures consult Spirax Sarco.
-25 ° C to +205 ° C -40 ° C to +120 ° C
Viton seat
Temperature limits
EPDM seat
Designed for a maximum cold hydraulic test pressure of:
76 bar g
10.5 29
TI-P134-26 CMGT Issue 10
Page 3 of 5
DCV6 Disc Check Valve
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