Troubleshooting Electric Diaphragm Pumps

Common faults of the electric diaphragm pump: Affected by various factors, the electric diaphragm pump will inevitably have some failures, more common are:

1, fast cycle / low flow, 2, no cycle, 3, leakage loss, 4, noise, 5, parts damaged, 6, slow cycle, 7, irregular cycle, 8, other failures can be divided into multiple possibilities Reasons for understanding correct maintenance measures A. Air valve: Plastic or metal valve housing is fixed to the pump center body with four screws B Piston: The aluminum cylinder is enclosed in the air valve and controls the air flow C Cavitation: Due to the pump inlet The amount of supplied fluid is reduced or lacking, and the pump discharge is less than the rated amount. In fact, the fluid chamber is not filled with fluid before discharge.

D Static discharge head: vertical distance (in meters) from the pump centerline to the free transfer point

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 the fluid weight to the weight of the water at 4 degrees. The specific gravity of the 4 degree water is 1.0. The static suction head – the inlet level To the vertical distance from the pump centerline, the pump should be above the liquid level. G Vapor pressure: The pressure of all liquids on the free surface of the steam. In any pump operating system, the operating pressure must not be lower than the vapor pressure. The resulting steam will partially Or completely cut off the viscosity of the fluid H into the pump: due to the presence of internal friction of the fluid, the viscosity causes the fluid to produce a flow resistance. I. Water Hammer Action: A higher inlet forms a hydrostatic head acting on the pump to generate internal pressure <br> < br> electric diaphragm pump fault exclusion

The electric diaphragm pump is not operating or running slowly. Check the air inlet filter or air filter for any foreign matter. Check that the air valve is stuck. Clean the air valve with the cleaning solution.

Check air valve for wear and replace new parts if necessary.

Check the condition of the sealing part of the center body. If it is seriously worn, the sealing effect cannot be achieved, and air will be drained from the air outlet end. Due to its special construction, use only GLYD rings.

Check for normal piston movement in the air valve.

Check the type of lubricant. If the added lube oil is higher than the recommended oil viscosity, the piston may get stuck or operate abnormally. Lightweight and antifreeze lubricants are recommended.

The pump is moving, but the flow is small or no liquid flows at all:

Check the pump for cavitation and lower the speed of the pump to allow the liquid to enter the chamber.

Check if the ball is stuck. If the operating liquid is incompatible with the pump's elastomer, the elastomer will expand. Replace the elastomer with the proper material.

Check that the connector at the pump inlet is fully locked and not leaking, especially if the clamp near the inlet end ball needs to be locked.

Pump air valve ice:

Check whether the moisture content of the compressed air is too high. Install a bubble in the outlet of the air drying equipment pump to check whether the diaphragm ruptures. Check whether the clamp is locked, especially if the inlet pipe clamp product flows out of the air discharge port to check if the diaphragm ruptures. Check whether the diaphragm and internal and external splints click on the shaft