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which has the function to prevent the pressure of the outlet pipe being too high, so as to protect the safe
operation of the pump. The buffer tank is used to reduce the non-uniformity of the flow in the pipe and then
to reduce the flow fluctuation. It is an auxiliary equipment for the purpose of reducing the non-uniformity
of the flow in the pipe by using the compression and expansion of the gas to store or release a part of the
liquid.
6. Pumps installed outdoor should be sheltered by rain cover.
7. When the pressure of the outlet pipe is less than 0.3MPaG or the inlet pressure is greater than the outlet
pressure (there is artesian phenomenon), the counterbalance valve should be installed at the outlet pipe of
the metering pump to ensure the accuracy of the fluid dosing of the metering pump.
IV
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User Guide
4.1 Preparation
1)
Before pump operation, check whether the bolts and nuts at the connections are loose; if a new pump is
used, scrub anti-corrosive grease or dirt with kerosene, and do not scrape off it with a knife by force.
2) L-CKE200# worm and worm gear oil (SH/T0094-1991) or N220 gear oil is filled into the transmission box
in priority, and oil shall be filled to the horizontal centerline of the oil level sight glass. 25# transformer oil
is filled into the hydraulic oil tank at 30~50mm below the opening of the bracket body, and the oil level is
generally not below the centerline of the plunger. The hydraulic tank is usually filled with appropriate
amount of transformer oil when leaving the factory. However, the users shall fill lubricating oil into the
transmission box by themselves.
The oil capacity of the transmission box and hydraulic tank of JYM25 (JYMT) single-cylinder hydraulic
diaphragm metering pump: 32L for transmission box and 15L for hydraulic box.
3)
Manually rotate the motor fan to move the plunger in full stroke without jamming. Turn on the power, start
the motor, check whether the rotation direction of the motor and the rotation direction of the pump is
consistent. The inlet and outlet valves on the pipes shall be fully open.
