Samson 33-7, Монтаж и эксплуатация

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EB 2551-2 EN 5-3
Installation
5.2 Preparation for installation
Before installation, make sure the following
conditions are met:
− The valve is clean.
− The valve, actuator and all piping are
not damaged.
− Install a strainer upstream of the regula-
tor.
− The valve data on the nameplate (type
designation, valve size, material, pres -
sure rating and temperature range)
match the plant conditions (size and
pressure rating of the pipeline, medium
temperature etc.). See the 'Markings on
the device' section for nameplate details.
− The requested or required additional fit -
tings have been installed or prepared as
necessary before installing the valve (see
the 'Design and principle of operation'
section).
Proceed as follows:
Î
Lay out the necessary material and tools
to have them ready during installation
work.
Î
Flush the pipeline before installing the
regulator.
The plant operator is responsible for
cleaning the pipelines in the plant.
Î
Check any mounted pressure gauges to
make sure they function properly.
Table 5-1: Inlet and outlet lengths
DN
min.
a x DN
min.
b x DN
a Inlet length
b Outlet length
State of process
medium
Valve conditions Inlet length a Outlet length b
Gas Ma ≤ 0.3 2 4
Liquid
Free of cavitation/w < 3
m /
s
2 4
Cavitation producing noise/w ≤ 3
m /
s
2 4