Why does J series metering pump make impact noise during operation?

Periodic impact noise in J series metering pumps often indicates cavitation in hydraulic chambers.

Check all suction pipe connections and apply sealant, for low-viscosity fluids install back pressure valve (0.2-0.3MPa recommended).

Metallic impact sounds from metering head usually come from worn valve balls/seats - replace if roundness error exceeds 0.05mm.

Sudden motor load changes may indicate sticking stroke adjustment mechanism, clean and relubricate the worm gear components.

For pipeline water hammer, install diaphragm-type pulsation dampener within 1m of pump discharge, pre-charge to 60% system pressure.