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Electric diaphragm pump common fault: affected by various factors Electric diaphragm pump will inevitably be some failure, the more common are: 1, fast circulation / low flow, 2, no circulation, 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, to understand the correct maintenance before the A air valve: plastic or metal valve housing is fixed by four screws Pump piston body on the B piston: aluminum cylinder enclosed in the air valve to control the gas flow C Cavitation: due to reduced or lack of fluid supplied to the pump inlet, pump discharge below the rated amount In fact, the liquid chamber in the discharge D Static discharge head: vertical distance (in meters) from pump centerline to free delivery point E Inlet pressure: 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 degrees 4 The specific gravity of water is 1.0, the static suction head - the vertical distance from the supply level to the pump center line, the pump should be above the liquid level G Steam pressure: Steam on its free surface creates pressure on any pump In the system, the operating pressure can not be lower than the vapor pressure, and the formed steam will cut off the fluid into the pump partially or completely. H Viscosity: The property of viscosity causes fluid flow resistance due to the internal friction of the fluid. I Water Hammer Effect: Of the import form a static pressure head on the pump to produce internal pressure Troubleshooting of electric diaphragm pump Electric diaphragm pump does not move or slow operation Check the air inlet filter or air filter is there any impurities Check the air valve is stuck, Liquid cleaning air valve. 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. The pump is active, but the flow rate is low or no fluid is flowing at all: Check the pump cavitation and 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 freeze: Check the compressed air moisture content is too high, the installation of air drying equipment Pump outlet bubbles are generated Check the diaphragm is broken, check the clamp is locked, especially the inlet pipe clamp products from the air vent Outflow check the diaphragm is broken, check the diaphragm and the internal and external clamp on the shaft whether the clamping valve rattle
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