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Various Metering Pump Maintenance And Treatment Methods

- Jun 10, 2018 -

How to replace the diaphragm of the metering pump? The
1. Remove the 4 screws holding the pump head. The screw is located on the back of the metering pump. The
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. The
3. Pull the fluid 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. The
5. Install the pump head after the diaphragm is installed and the back-plate leak drain hole is in the 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. The
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. The
7.  When the hydraulic end is adjusted with the position of the back plate,  tighten the four bolts diagonally until they are suitable. Apply the force evenly when you finish this task. I received a spare part kit and got into trouble when removing the old diaphragm. Can you provide some additional advice on how to remove the old diaphragm? Dismantle the hydraulic end by loosening the 4 pump head screws. Rotate  the stroke length to 0% and grasp the hydraulic end, then slide out of  the screw hole, then the screws do not touch them, but they also hold  the back plate and the diaphragm. Then turn this part counterclockwise, with some resistance, and the diaphragm will loosen from the electromagnetic shaft. If the diaphragm has not loosened, apply some lubricant to the contact surfaces of the diaphragm and the electromagnetic shaft. After standing for a few minutes, gently hit the diaphragm with a plastic hammer. Then proceed again as described above. When hydrogen peroxide is measured by a self-priming method, air pockets are generated in the system. how to solve this problem? The metering pump is installed from the exhaust pump head and is self-priming. Keep the suction line as short as possible.
Metering pump is not measured after installation and operation?
1. Is a drain tube installed and the drain valve closed? The drain valve needs to open during the priming phase of the metering pump. Note: Not all metering pumps have drain valves. The
2. There may be a gas leak at the suction side of the metering pump. Fluid end suction side connections may lack o-rings or loose suction valve connections.
3. The metering pump bottom valve may be clogged and the metered solution may not pass.
4. The stroke length setting of the metering pump is not suitable.
5. The metered chemicals may crystallize at the hydraulic end, causing the check valve ball and seat to not function properly. The
I  am using flow monitoring to meter a highly viscous medium and receive a  flow failure indication signal during the priming process. What can I  do to solve this problem? The pulse duration may not be long enough for  reaction time. With  respect to the standard pulse width of 80 msec, the flow monitor pulse  width extension can be activated, increasing the pulse width to 300  msec. Activate the intelligent transfer switch, remove the cover of the fixed circuit board, and remove the jumper X-1. This activates the extended function, allowing more time before the fault indication.
How  to prevent the stroke positioning motor from burning? When adjusting  the stroke position, make sure the metering pump motor is always  running. If  the metering pump motor is not running, the stroke length adjustment  lever will resist the tension of the compression spring, which will  result in premature failure of the stroke positioning motor.

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