Why does J series metering pump discharge no liquid? How to fix?

When J series metering pump discharges no liquid, the first step is to check suction conditions.

Excessive suction height is a common cause - the pump cannot create enough vacuum when installed above maximum allowed elevation.

Pipeline blockage is another major reason, especially when handling viscous or particle-containing fluids.

Air leakage at suction pipe connections will also prevent liquid intake, which can be detected by foaming agent test.

Always refer to Yiling pump manual for proper torque specifications when tightening flange bolts.

Regular maintenance of suction filters and valves can prevent most zero-discharge problems.