There is a common diaphragm metering pump metering pump type, suitable for corrosive, volatile and other characteristics of the medium, for the special conditions of the metering pump is relatively high, it should be on the metering pump regular maintenance, so as to ensure the smooth operation of metering pump, diaphragm metering pump repair should be so pay attention to what, the mechanical Keyu to everyone.

1, the pump valve inspection should pay attention to whether the sealing ring aging deformation, spring elasticity is seriously reduced, the valve port and the valve core has no wear, corrosion and other defects, installation valve ends should be flat with the pump body flange, can not be recessed;
2, diaphragm replacement, the pump head should be hoisted in advance to prevent falling damage;
3, the adjustment mechanism disassembly and assembly to calibrate the length of the stroke position (stroke length 5mm), unloading scale table seat, the scale ring slide into the calibration position, the measurement of stroke length should be consistent with the scale table;
4, when the piston is removed, use the special pointed tool to remove the packing ring from its groove, and pay attention to not to damage the ring groove;
5, worm and worm gear to be checked, its teeth should be intact, there should be no cracks or broken teeth, installation to check the meshing contact