52
Whilst checking the outlet pressure of the PRV,
set the maximum pressure
required
by adjusting the position of the
actuator bolt
.
To do this, use the middle nut (fixed) on the actuator thread:
•
Screw it clockwise / inwards to increase the output pressure.
•
Screw it anticlockwise / outwards to decrease the output
pressure.
The adjustment should be made slowly to avoid damage that could be
caused by sudden changes to the water network pressure. Make sure
you allow time for the PRV to settle its pressure after adjustment.
Once the maximum pressure is achieved, tighten the bottom lock-nut
on the actuator screw thread against the PRV pilot (see picture).
This will secure the maximum outlet pressure
.
Whilst checking the outlet pressure of the PRV,
set the minimum pressure
required by
adjusting the position of the
actuator head
.
To do this, hold the middle nut (fixed) on the actuator thread stationary, using a
spanner, whilst rotating the actuator head.
•
Screw it anticlockwise / outwards to decrease the output
pressure.
•
Screw it clockwise / inwards to increase the output pressure.
The adjustment should be made slowly to avoid damage that could be
caused by sudden changes to the water network pressure. Make sure
you allow time for the PRV to settle its pressure after adjustment.
Once the minimum pressure is achieved, tighten the top lock-nut
on the actuator screw thread against the underside of the actuator
head (see picture).
This will secure the minimum outlet pressure
.
