16
WARNING
Direct injection systems
This product contains a rust inhibitor to protect it against corrosion during
storage. To avoid any possible contamination of your product, after first blowing
down the approach pipework, we recommend that the valve is blown through
thoroughly in order to remove any trace of the inhibitor.
4. Commissioning
DP17, DP17E, DP17G, DP17Y and DP27G (Fig. 8)
2. Close all valves at reducing valve station,
including valves on bypass line if fitted.
3. Check that adjustment screw is turned fully
anticlockwise until spring is slack.
DP17R (Fig. 9)
2. Close all valves at reducing
valve station, including the valve
on the bypass line, if fitted.
3. Check that the actuating air
supply is off and the pressure is
zero.
4. Check that the pressure gauge isolating cocks are open.
5. For correct operation of the valve it is important that the pilot and main valves are not
subjected to dirt or other hard particles. Therefore, prior to bringing the valve into
operation, ensure that the upstream pipework has been cleared of all loose dirt and
hard particles and that the main strainer screen is examined and cleaned if necessary.
6. Slowly open the upstream isolating valve until it is fully open.
DP17, DP17E, DP17G, DP17Y and DP27G
7. Using a 19 mm A/F spanner slowly turn
adjustment screw in a clockwise
direction until desired downstream
pressure reading is obtained.
8. Holding the adjustment screw in position
with the spanner tighten down the lock-
nut to secure the setting of the
adjustment spring,making sure that the
'C' washer stays in position.
DP17R
7. Slowly admit actuating air through the
pressure regulator until the desired
downstream pressure is obtained.
Note : To facilitate resetting of the reducing
valve it may be desirable to position the
downstream pressure gauge at a viewpoint
close to the air regulator.
If this necessitates fitting the pressure
gauge below the steam line, the
interconnecting pipe should be drained at
the low point otherwise the gauge will give
a false reading.
9. Slowly open the downstream valve until it is fully open.
Note: After installation or maintenance ensure that thet system is fully functional. Carry
out tests on any alarms or protective devices.
4.1 Setting procedure (Fig. 8 and Fig. 9)
1. Ensure that all connections are properly made and that all valves are closed.
To Next Page
Loading...
Need help?
General
