34
d. Slowly open the inlet isolation valve (A)
DANGER
In new installations or fully drained systems the pipework may shift due to water hammer effect.
► Assume a protected working position
► Ensure personnel are not within valve chambers for initial pressurisation.
e. Check thoroughly for leaks around the valve.
3.4
SETTING PRV DOWNSTREAM PRESSURE
3.4.1
WITH HYDRANT
a. Attach pressure gauges to valve body to monitor upstream & downstream pressure.
b. Open hydrant (H) and allow reasonable flow rate (~5 L/s) through valve.
c. Alter pilot setpoint and monitor downstream pressure to verify the valve is controlling.
d. Set downstream pressure near to desired value.
e. Slightly open outlet isolation valve (O)
f. Fully close the hydrant (H)
Summary of Contents for NeoFlow DN200
Page 1: ...Operating instructions NeoFlow Pressure Reducing Valve DN200 DN300...
Page 10: ...10 1 7 BILL OF MATERIALS PRESSURE REDUCING ASSEMBLY...
Page 12: ...12 1 8 BILL OF MATERIALS VALVE BODY...
Page 23: ...23 2 2 2 PERMITTED VALVE ORIENTATIONS Horizontal Orientation Vertical Orientation...
Page 42: ...42...
