172-65254MA-04 (A-COS-10) 22 Apr 2020
12
Adjustment
Use only under conditions in which no water hammer will occur.
The impact of water hammer may damage the product, leading to fluid
discharge, which may cause burns or other injury.
CAUTION
The product should be properly adjusted for protection of the air-using equipment
against water hammer.
1. It is necessary to blow down all pipe lines thoroughly. The blowdown is especially
important if the line is new or has been shut down for a long period of time.
Take particular care to ensure that matter such as condensate and dirt does not
remain inside the air-using equipment.
(Stay clear of any pressurized blow-out from the safety valve.)
2. Make sure that the shut-off valve and the bypass valve located upstream and
downstream of the product are completely closed.
3. Remove the spanner cap, loosen the locknut and turn the adjustment screw
counterclockwise to reduce tension on the coil spring.
Loosen the locknut
Loosen the
adjustment screw
Counterclockwise
4. Slowly, fully open the shut-off valve at the inlet of the product. Allow sufficient
time for condensate remaining at the inlet of the product to be discharged.
5. Slightly open the shut-off valve at the outlet of the product.
6. Turn the adjustment screw until the desired outlet pressure is obtained. Wait
several minutes.
Loosen the Adjustment Screw
Decrease Pressure
Tighten the Adjustment Screw
Increase Pressure
Counterclockwise
Clockwise
7. Slowly, fully open the shut-off valve at the outlet of the product.
8. After setup, retighten the locknut and replace the spanner cap.
9. When shutting down the system, always close the outlet shut-off valve first and
then the inlet valve.
