-5-
3. Preparatory work
Before commissioning the valve, check that the gate valves on the inlet and outlet sides of the valve (or the
slider on the inlet side) are/is
closed
and that the flange connections have been correctly tightened and
sealed.
On the valve:
•
Open ball valves (2A and 2B) and loosen the set screw lock nut on the one-way flow restrictor (5)
•
Unscrew the adjusting screw on the one-way flow restrictor (5) by approximately 10 turns. (The line
to the control chamber is open).
•
Close the ball valve (2C)
•
Loosen the threaded pin in the central plug on the position indicator by a few turns.
•
Loosen the threaded pin in the venting elbow by a few turns.
Threaded screw in the venting elbow
Vent hole
•
Lower the adjusting lever on the pressure reduction control valve (6) and turn the lever to the right
until a very high resistance is felt from the spring.
•
1403 Solenoid valve (9) inactive (
➔
solenoid valve has no flow).
•
1404 Solenoid valve (9) inactive (
➔
solenoid valve has flow).
4. Venting
Procedure:
Slowly
open the inlet gate valve on the inlet side until water flows into the valve. The valve fills with water
and the air escapes through the open vent holes.
When all the air has been expelled by venting the valve in the control line, re-tighten the threaded pin. Check
that all the screw connections are properly sealed, and re-tighten if necessary.
Slowly
open the inlet gate valve completely.
Check:
If the shut-off gate valve on the outlet side is slightly opened, the valve should close or remain
closed. Then close the shut-off gate valve again.
If the valve does not close, the commissioning procedure must be repeated from the previous chapter.
Particular care must then be taken to ensure that the upper valve chamber and control lines are properly
vented.
5. Adjustments
Prepare the valve according to Chapters 2 and 3. The gate valves on the inlet and outlet side are closed.
Procedure:
•
Slowly
open the ball valve (2C)
•
Gradually and
slowly
open the gate valve on the outlet side (if present) (according to previous
chapter, the slider on the inlet side is already open).
•
Valve 1403:
Apply power to the solenoid valve (9) (
➔
solenoid valve has flow, opens).
•
Valve 1404:
Leave solenoid valve (9) inactive (
➔
solenoid valve has flow, is open).
•
Slowly turn the adjusting lever of the control valve (6) to the left until the valve opens (audible sound
of water flowing).
•
Check the inlet pressure on the pressure gauge.
