SK 174020 00 01x Entech Nozzle Check Valve Iom

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ENTECH
RECOMMENDED INSTALLATION
GUIDELINES FOR NOZZLE CHECK VALVES

The Nozzle Check Valve (NCV)
should be installed a minimum
of 5 diameters and preferably 8
diameters downstream of a flow
impediment, i.e. valve, reducer
or bend etc, to ensure a good
flow pattern at the entry to the
NCV.

If isolating valve is throttling,
check valves should be
installed as shown.

The NCV should also be
installed at least 3 diameters
upstream of a bend or reducer
to avoid choked flow conditions
which can prevent the full
opening of the check valve.

The Nozzle Check Valve
(NCV) may be installed on the
upstream side of isolating
valves. If the isolating valve is
throttling, clearance as shown
should be allowed to ensure
full pressure recovery after the
NCV.
The NCV may be installed
closer to the inlet of the
isolating valve if it is full port
and fully open.

SK-174020-00-01

REV 01



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Create Date                     : 2011:03:09 14:00:48Z
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