(Dis)assembling pump head and diaphragm

Many processes are controlled by a PLC or process computer. It is then convenient that a dosing pump can also be controlled by this. The motor-driven Prius D MF can also produce a very high flow. Up to 1000 litres per hour at a relatively high pressure of 5 bar.

These features make the Prius MF is a widely used dosing solution at water treatment plants and within industry. With a combination of the available materials, virtually any liquid can be dispensed safely and accurately. This dosing pump has 10 available working modes including: weekly timer dosing, pulse, mA, Volt and Batch, level control, alarms, standby, timer.

(De)assembling pump head and diaphragm

Disassembling a pump head and diaphragm on a dosing pump is an essential step for maintenance and repair. Follow these steps for a trouble-free procedure:

  • Remove the screws from the pump head. This will allow you to remove the pump head and access the diaphragm.
  • If you start removing the diaphragm and it starts spinning, it will spin viciously because of the piston. 
  • You need to lock the piston here on the inside of the pump. To achieve this, hit it and the piston will be locked. 
  • Then you can start removing (rotating) the membrane.
  • To replace the diaphragm and pump head, turn the diaphragm clockwise. 


Always remember the manufacturer's safety instructions and refer to the dosing pump manual for specific disassembly and assembly instructions. Regular maintenance of the pump head and diaphragm extends the life of the dosing pump and ensures efficient operation.

It is important to check that the holes of the diaphragm are aligned with the holes in the pump housing.

Finally, unlock the piston with a few strokes. 

And now the diaphragm does not come out (to reassemble the pump head, start screwing again).

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