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Installation
Table 5-1: Inlet and outlet lengths
min.
a x DN
DN
State of process me-
dium
Gas
Vapors
1)
Liquid
No saturated steam
1)
p
1
2
3
Fig. 5-2: Type 42-10 RS (installation example)
5-4
min.
b x DN
Valve conditions
Ma ≤ 0.3
Ma ≤ 0.3
Free of cavitation/w < 3
Cavitation producing noise/w ≤ 3
1
2
1
Shut-off valve
Strainer
Pressure gauge (flow pipe)
Inlet length a
2
2
2
/
m
s
2
m
/
s
4
3
_
+
+
_
4
Type 42-10 RS Check Valve (backflow protection)
5
Pressure gauge (return flow pipe)
6
Shut-off valve
a
Inlet length
b
Outlet length
Outlet length b
4
4
4
4
5
6
p
2
EB 3009 EN
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