APG series internal meshing gear pump commissioning matters needing attention

Release time:

2023/08/29 15:42

Prepare:
● Check to confirm that the installation of the system has been completed in a careful and clean manner.
● Only fill hydraulic oil through filters with the required minimum retention rate.
●Fill the pump with hydraulic oil through the oil suction pipe or pressure pipe.
Check that the direction of rotation is adhered to for the pump type.

Emission:
●Open the discharge point of the system or switch to non-pressurized circulation according to the operating instructions of the system. During the discharge period, it must run at low speed and without pressure, and the speed should not exceed 200 revolutions per minute to ensure the discharge of zero-pressure enclosed gas.
● To drain the pump, turn the pump on and then immediately turn it off again (jog mode). Repeat this process until you are sure the pump is completely drained.
● Manually close the open drain again.
Open the bypass valve on the oil outlet pipeline, and the bypass valve can be directly connected back to the oil tank. If there is no bypass pipeline, you need to fully loosen the oil outlet hose joint and discharge the air until there are no more air bubbles in the hydraulic oil produced, then tighten the fittings or hoses.

Debugging:
●It is strictly forbidden to overspeed or run for a long time (less than 20 seconds) before the air is exhausted from the oil outlet. If the oil cannot be discharged, please find out the reason before running.
●If it is confirmed that the pump is completely discharged, the motor can be switched on. Let the pump run at zero pressure until the system is completely emptied. When draining the system, observe system operation.
●Adjust the system according to the system operating instructions, and then load the pump.
●After a period of working time, check whether there are air bubbles or foam on the surface of the hydraulic oil in the oil reservoir.

Operate:
●Pay attention to the change of noise characteristics during operation. As the working medium heats up, some slight noise is normal. A large increase in noise or a short-term random change in noise indicates possible air ingestion. If the oil suction pipe is too short or the oil filling level of the working medium is too low, air may also be sucked in by the vortex.
●Changes in operating speed, temperature, increased noise or power consumption indicate wear or damage to the system or pump. re-debugging
Check the pump and system for leaks. If there is a leak, the hydraulic fluid is leaking from underneath. An increase in the hydraulic fluid level in the reservoir indicates a leak above the hydraulic fluid level.
● If the pump is placed above the hydraulic oil level, the pump may run empty due to leakage (eg worn shaft seal). In this case, the system must be drained again during recommissioning in preparation for the repair.
●After repair and maintenance work is completed, the system must be drained again.
●If the system is intact, switch on the motor.

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Jiangsu Aoad Fluid Technology Co., Ltd.