Under normal service condition, if the pressure difference alarm of the pre filter device is used for alarm or accumulative use for more than 300 hours, the filter element should be replaced. Double cartridge parallel pre filtration device can replace the filter element without stopping.
Filter cartridge replacement method:
Replacement of filter core of 1. single bucket prefilter
A. close the inlet valve and open the upper cover. (the upper end cover of the aluminum alloy needs to be gently pried away from the side notch using a flat mouth screwdriver).
B. unscrewing the sewage outlet plugging the silk, clean the dirty oil;
C. loosens the fastening nuts at the upper end of the filter core, the operator holds the filter core with anti oil gloves and takes the old filter core vertically up.
A new D. filter, the sealing ring pad good upper (lower comes seal), tighten the nut; F. tighten the dirt outlet plug, cover cover (note pad ring), good fastening bolt.
Replacement of filter core of 2, double barrel parallel prefilter
A. first closes the oil intake valve that needs to replace the filter on the filter core. After a few minutes, the oil valve is closed, then the end cap bolt is screwed and the end cover is opened.
B. open the drain valve, thoroughly drain the oil to prevent the replacement of filter cartridge into the oil purification chamber.
C. loosens the fastening nuts at the upper end of the filter core, the operator holds the filter core with anti oil gloves and takes the old filter core vertically up.
D. replace the new filter core, cushion the upper seal ring (the lower end has a self sealing pad), tighten the nut;
E. close the drain valve, cover the upper cover (notice the sealing ring), and fasten the fastening bolts.
F. first opens the intake valve, then opens the exhaust valve. When the exhaust valve is out of the oil, it immediately closes the exhaust valve, then opens the oil valve, then operates the other side filter in the same way.