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Metering Pump Diaphragm Damage How To Replace

- Jun 10, 2018 -

Metering  pumps are used more and more in the current pump market. Diaphragm  metering pumps are used in special environments. However, due to some  unsuitable operation or other reasons, the diaphragm pump may be damaged  during use. If  you find that the replacement of the diaphragm of the metering pump is  not replaced in time, it will cause unsatisfactory results. Then, if the  diaphragm of the metering pump is damaged, replace it with the  following steps.
1. Remove the 4 screws holding the pump head. The screw is located on the back of the metering pump.
2. After the pump head is loosened, adjust the stroke length to 0% before removing the pump head. It  can ensure that the electromagnetic shaft has sufficient pressure to  keep it firmly connected, so that the diaphragm can be unscrewed.
3. Pull the hydraulic end outward to disengage the screw from the socket. Hold the liquid end counterclockwise. Slight resistance, you can unscrew the diaphragm.
4.  Once the diaphragm is removed, check the safety diaphragm of the  metering pump to ensure it is intact and without any damage. Install the new diaphragm and turn the back plate and diaphragm clockwise until tight. Adjust the back plate so that the drain hole is at the bottom of the pump.
5. Install the pump head after the diaphragm is installed and the back-plate leak drain hole is in a vertical position. Make  sure that the suction valve is aligned with the leak drain hole and  that the hydraulic end screw is aligned with the corresponding 4 holes.
6. Rotate to 100% of stroke length. This will allow the entire assembly to rotate until the back plate leaks out and aligns with the bottom of the pump. Adjust the hydraulic end and diaphragm to the proper position while the pump is running.
7.  When the hydraulic end is adjusted with the position of the back plate,  tighten the four bolts diagonally until it is suitable. Use this force evenly to complete the job and ensure that everything is safe.

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