This article mainly collects some common faults and solutions of metering pumps. Common metering pumps include: metering fluoroplastic pump, metering engineering plastic pump, flocculant metering pump, precision metering pump I. Pump outlet end of the cause of drug leakage 1: Hose fittings or flange joints lock excessive deformation, O-ring damage, etc. Disposal: Stop the pump, remove the leak parts, check the deformation and damage.If necessary, O-rings and other pieces, to replace the new. Cause 2: The pump head or the connector is damaged Disposal: Stop the pump and remove the leakage part to replace the new one II. Abnormal decrease in the export volume Cause 1: The flow control panel is fixed invalid Disposal: Lock control dial fastening screw Cause 2: Pump inlet or outlet, or valve seat obstructed by a foreign object Disposal: Remove relevant parts, inspect foreign body, thoroughly clean, and inspect the pump head at the top of the valve Cause 3: Fudoo valve (bottom valve) blocked Disposal: Disassemble the Fudan valve, check for dirt and remove it. Cause 4: Long-term use of the diaphragm fatigue. Disposal: Decomposition decomposition, replacement of the new diaphragm. When changing the diaphragm, the average rotation of the four screws Loose (remove the diaphragm) or rotate evenly on average (install the diaphragm Remedy: Defect of the diaphragm Disposal: Disassemble and disassemble the new diaphragm according to the exploded view When the diaphragm is changed, loosen the four screws in turn (remove the diaphragm) Or turn on the average rotation (diaphragm installation)