Electric diaphragm pump troubleshooting

December 21, 2023

Electric diaphragm pump troubleshooting Electric diaphragm pump common fault: affected by various factors Electric diaphragm pump will inevitably be some failure, the more common are:
Fast circulation / low flow, 2, no cycle, 3, leakage, 4, noise, 5, parts damaged, 6, slow cycle, 7, irregular circulation, 8, other failures can be divided into a variety of possible reasons , For correct maintenance before A Air Valve: Plastic or metal valve housing bolted to pump body by four screws B Piston: Aluminum cylinder enclosed in air valve to control air flow C Cavitation: As pump inlet is supplied Reduced or absent fluid volume, pump discharge below nominal volume, in fact, the liquid chamber is not filled with fluid prior to discharge.
D Static discharge head: vertical distance from pump center line to free delivery point (in meters)
E Inlet pressure: The inlet is measured in Bar, including the specific gravity of the fluid and the flow rate F. Specific Gravity: The ratio of fluid weight to water weight at 4 ° C. The specific gravity of 4 ° water is 1.0, The vertical distance from the centerline of the pump to the pump should be above the liquid level. G Vapor pressure: All liquids generate pressure on their free surface steam. Operating pressure in any pump operating system must not be lower than the vapor pressure. Partially or completely cut off into the fluid H Viscosity: due to the presence of fluid friction, the nature of the viscosity of the fluid flow resistance of the fluid I Water hammer effect: the formation of a higher inlet static pressure on the pump to produce internal pressure Electric diaphragm pump Troubleshooting The electric diaphragm pump does not move or operates very slowly Check the air inlet filter or air filter for impurities Check if the air valve is stuck and clean the air valve with a cleaning fluid.
Check air valve for wear and tear, replace new parts if necessary.
Check the center of the seal parts condition, if severely worn, you can not achieve the sealing effect, and the air will be discharged from the air outlet. Due to its special construction, use only GLYD circles.
Check the air valve piston activity is normal.
Check the type of lubricant. If the added lubricant is above the recommended viscosity, the piston may get stuck or malfunction. Recommend the use of thin and antifreeze lubricants.
Pump moves, but with little or no liquid outflow:
Check the cavitation of the pump to reduce the speed of the pump to allow liquid to enter the chamber.
Check if the valve ball is stuck. If the operating fluid is incompatible with the pump elastomer, the elastomer will swell. Please replace the appropriate material elastomer.
Check the pump inlet connector is completely tight leak, especially near the entrance of the valve ball to be locked.
Pump air valve frozen:
Check the compressed air moisture content is too high, the installation of air drying equipment Bubble generated at the outlet of the bubble Check the diaphragm is broken, check the clamp is locked, especially the inlet pipe clamps outflow from the air outlet Check the diaphragm rupture, Check if the diaphragm and the inner and outer cleats pinch the valve on the shaft to rattle

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Ms. Lucia Peng

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sales05@hangsam.com.cn

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