9
DOUBLE ACTING SYSTEM WITH 2 CYLINDERS
START UP OF A DOUBLE ACTING INSTALLATION
LARZEP cylinders can operate vertically upwards, downwards or horizontally and
are fitted with a safety
valve to prevent pressure intensification in the return chamber
.
Check the correct installation and perfect functioning of the device with a load, in accordance with the next
procedure:
-
All double acting LARZEP cylinders are equipped with a mechanical end of stroke capable of
withstanding the nominal pressure.
-
Operate the pump to move the cylinder, following its operating instructions.
-
When using a hand pump, turn the lever of the valve and pump. Oil will flow through the hose
connected to the opposite side that the valve lever is rotated. If the hose is connected to the cylinder's
advance chamber, the piston will move forward. The oil in the return chamber will flow freely through
the other hose to the pump tank. Flow is supplied by both, large and small pistons until the cylinder
reaches de load.
-
Continue pumping until you reach the mechanical end of stroke. Pressurize installation to check for
leaks.
-
Stop pumping and check (preferably using a pressure gauge) that the installation maintains the pressure
level.
-
Turn the valve lever to the other side and pump. Oil will flow to the return chamber and the piston will
move back. The oil in the advance chamber will flow freely back to the tank.
-
Repeat the processes as many times as necessary until you are comfortable handling the device.
-
If using close or check valves, or working with various cylinders via flow distributors, remember to take
into consideration the effect these accessories may have on the functioning of the device, and establish
an operating procedure in order to avoid unwanted effects.