IM-P134-08
CMGT Issue 10
10
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TRANSLATION RUN OVER
After installation or maintenance ensure that the system is fully functional. Carry out tests on any alarms or
protective devices.
Disc check valves are opened by the pressure of the fluid and closed by the spring as soon as the flow ceases
and before the reverse flow occurs.
Open
Closed
4. Commissioning
5. Operation
Kv values
DN
15
20
25
40
50
80
100
Kv
4.4
7.5
12
26
39
84
150
For conversion:
Cv (UK) = Kv x 0.963
Cv (US) = Kv x 1.156
Opening pressures
in mbar
Differential pressures with zero flow for standard and high temperature springs.
Flow direction
DN
15
20
25
40
50
80
100
25
25
25
28
29
31
33
22.5
22.5
22.5
24
24.5
25.5
26.5
20
20
20
20
20
20
20
Where lowest opening pressures are required, valves without springs can be installed in vertical pipes with
bottom-to-top flow.
Without spring
2.5
2.5
2.5
4.0
4.5
5.5
6.5
Fig. 4
Summary of Contents for DCV4
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