22
Installation Procedure
The following assumes that the valve is not vented to the maximum or used to cut the water
supply. The output pressure is not regulated during installation, and variations in inlet
pressure affect the output pressure until the installation is complete.
Ensure that the valve is working properly before connecting to the actuator, if not, it is
essential to repair the PRV control before.
1. Block the PRV into position, closing the valve on the top chamber if possible.
2. Alternatively, shutoff both input and output at the same time, to ensure that the valve
is locked in that position. The volume of water in the main chamber remains constant.
3. Ensure that the thread of the actuator is the same type of thread.
4. Screw the Actuator thread in until finger tight, the pin should now be fixed.
5. Unscrew the pressure adjustment screw is located on the pilot of the PRV. If pressure
drops at this point the valves are leaking.
6. Screw the actuator in the pilot of the PRV. Rotate the actuator to apply the same
force that he had when placed the old screw.
7. Slowly open shutoff valves simultaneously both upstream and downstream, to
reapply the pilot control.
8. Check the regulated pressure downstream of the PRV and set the maximum
pressure required rotating the actuator.
9. Tighten the lock-nut on the bottom of the screw to secure the maximum output
pressure.
10. While checking the regulated pressure downstream of the PRV, Rotate the top of the
actuator anticlockwise adjust the minimum pressure required (eg Night) by turning the
top of the actuator (support the fixed central nut with a spanner).
11. Tighten the lock-nut on the top of the screw to secure the minimum outlet pressure.
Maximum and minimum pressure are now adjusted.
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