Adjustment - TLV COSR-3 Einbau- Und Betriebsanleitung

5. Adjustment

The COS/COSR reducing valve should be properly adjusted for protection of the steam 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 steam
equipment.
(Stay clear of any pressurized blow-out from the safety valve.)
2. Make sure that the shutoff valve and the bypass valve located upstream and downstream of
the COS/COSR 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
4. Slowly, fully open the shutoff valve at the inlet of the COS/COSR. Allow sufficient time for
condensate remaining at the inlet of the COS/COSR to be discharged.
5. Slightly open the shutoff valve at the outlet of the COS/COSR.
6. Turn the adjustment screw until the desired outlet pressure is obtained. Wait several
minutes.
Tighten the Adjustment Screw
Increase Pressure
7. Slowly, fully open the shutoff valve on the outlet side.
8. After setup, tighten the locknut and replace the cap.
9. When shutting down the system, always close the outlet shutoff valve first and then the inlet
valve.
Clockwise
― 14 ―
Counterclockwise
Loosen the Adjustment Screw
Counterclockwise
Loosen the Adjustment Screw
Decrease Pressure