Operators
manual
Gorter-Controls B.V. – Schoonhoven- The Netherlands
Operators manual underground gas pressure reducing station
Type: COCON 26 N-LP
Page 18
4.6.4 Operation
When you have adjusted (paragraph 4.8 on page 18) and installed the cartridge and carried out a
leakage test, then the cartridge is ready to start operating.
Remark:
Before you start operating the cartridge, check that the red button
under the transparent cap is pressed in.
-
Close the needle valves.
-
Close the casing cover.
-
Open the butterfly valve DN150 in the discharge pipe, by turning the handle a quarter of a turn
to the left
-
Open the valve attached in the supply pipe, located within 5 meter of the station.
-
Open the ball valve DN50 in the supply pipe, by slowly turning the valve's handle a quarter of
a turn to the right.
The pressure gauges which indicate the inlet pressure, intermediate pressure and the reduced
pressure are situated directly under the casing cover and are visible through a plexiglass windowed
casing cover. If the outlet pressure is lower or higher than the required pressure, then readjust the
regulator pilot.
-
Remove the plexiglass casing cover above the pilots.
-
Loosen the locking nut on the regulator pilot.
-
Turn the spindle with a socket head screw spanner until the required outlet pressure is
reached.
-
Tighten the locking nut.
-
Close the casing cover again.
4.7 Shutting down cartridge operations and removal
of the cartridge
This paragraph describes the shutting down of the cartridge's operations and the removal of the
cartridge, for maintenance or correcting malfunctions.
-
Close the valves attached in the supply and discharge pipe, located within 5 meters of the
station.
-
Open the pit cover with a special spanner.
-
Close the ball valve in the supply pipe.
-
Close the butterfly valve DN150 in the discharge pipe.
-
Open the needle valves.
-
Wait until the pressure gauge, which shows the inlet pressure, indicates "0".
-
Wait until the pressure gauge, which shows the outlet pressure, indicates "0".
All handles are now turned away from the cover. To remove the cartridge, proceed as follows:
-
Open the casing cover.
-
Loosen the two bolts M12 in the influence block.
-
Rotate the cartridge to the left until, the casing indenting no longer engages the cartridge
indenting.
Remark:
Take care of your back, while installing and removing the cartridge.
Kneel and keep your back straight.
-
Lift the cartridge perpendicular from the casing by the handles.
See paragraph 4.6.2 for installing a spare cartridge.
