Samson 3241 Series User Manual

5-2 EB 8015 EN
Installation
Vent plugs
Vent plugs are screwed into the exhaust air
ports of pneumatic and electropneumatic de-
vices. They ensure that any exhaust air that
forms can be vented to the atmosphere (to
avoid excess pressure in the device). Further-
more, the vent plugs allow air intake to pre-
vent a vacuum from forming in the device.
Î Locate the vent plug on the opposite side
to the work position of operating person-
nel.
5.2 Preparation for installation
Before installation, make sure the following
conditions are met:
− The valve is clean.
− The valve and all valve accessories (in-
cluding piping) are not damaged.
− The valve data on the nameplate (type
designation, valve size, material, pres-
sure rating and temperature range)
match the plant conditions (size and
Table5-1: Inlet and outlet lengths
Q
a x DN b x DN
State of process
medium
Valve conditions Inlet length a Outlet length b
Gas
Ma≤0.3 2 4
0.3≤Ma≤0.7 2 10
Vapor
Ma≤0.3
1)
2 4
0.3≤Ma≤0.7
1)
2 10
Saturated steam (percentage of conden-
sate >5%)
2 20
Liquid
Free of cavitation/w<10m/s 2 4
Cavitation producing noise/w≤3m/s 2 4
Cavitation producing
noise/3<w<5m/s
2 10
Critical cavitation/w≤3m/s 2 10
Critical cavitation/3<w<5m/s 2 20
Flashing – 2 20
Multi-phase – 10 20
1)
No saturated steam
Q Flow rate
a Inlet length
b Outlet length

Samson 3241 Series Specifications

General

Brand	Samson
Model	3241 Series
Category	Control Unit
Language	English