Metering pump common faults and solutions
Metering pump in the long-term use of the process may often appear some small faults, then if we can grasp the corresponding solution, metering pump efficiency will certainly be improved, the following specific metering pump common faults and solutions: a , Remove the old diaphragm suggestions: by moving the four pump head screws, move the hydraulic end. Rotate the stroke length to 0% and grasp the hydraulic end, then slide out of the screw hole, then the screw does not come into contact with them, but also hold the back plate and the diaphragm. Then rotate this part anticlockwise, with a slight resistance, and the diaphragm will loosen from the solenoid shaft. If the diaphragm has not loosened, use some lubricant on the contact surfaces of the diaphragm and the electromagnet. After a few minutes, gently tap the diaphragm with a plastic hammer. Then proceed again as described above. Second, to solve when using self-priming hydrogen peroxide, the system produces cavitation method: metering pump installed from the exhaust pump head, using self-aspirating fluid. Keep the pipette as short as possible. Third, replace the metering pump diaphragm method and steps: A. Remove the fixed head of the four screws. Screw the back of the metering pump. B. After the pump head is loosened, adjust the stroke length to 0% before removing the pump head. Can ensure that the electromagnetic axis has enough pressure to keep it firmly connected, so that you can unscrew the diaphragm; C. Pull the hydraulic end out of the screw from the socket. Hold the liquid side counterclockwise. With some resistance, the diaphragm can be unscrewed. D. Once the diaphragm has been removed, check the dosing pump safety diaphragm to make sure it is intact without any damage. Install a new diaphragm and turn the backplate and diaphragm clockwise until tight. Adjust the backplane so that the drain drain hole is located at the bottom of the pump. E. Install the pump head after the diaphragm is installed and the backplane drain drain hole is in the upright position. Make sure that the suction valve is aligned with the leakage vent and that the hydraulic end screw is aligned with the corresponding 4 holes. F. Rotate to 100% stroke length. This will rotate the entire assembly to the backplane drain vent and align with the bottom of the pump. Adjust the hydraulic end and the diaphragm to the proper position during pump operation. G. After the hydraulic end is adjusted in position with the backing plate, tighten the 4 bolts diagonally until they are suitable. Apply uniform force to accomplish this task.