Common Metering Pump Faults and Fixes
Author: Zhejiang Weilan Technology Co., Ltd.Source: Official sitePublished: Category: Technical Articles
Summary: No flow, insufficient output, noise or leaks — causes and quick fixes for ten common metering pump faults.
No Output
Check in order: tank level → clogged suction valve → air in the head → stuck discharge check valve.
Low Flow
Usually aging diaphragm, worn valve balls/seats or air leaks on suction. Replace wear parts to restore.
Other Faults
| Symptom | Cause | Fix | |---------|-------|-----| | Noise | Bearing/worm wear | Inspect drive | | Head leaking | Ruptured diaphragm | Stop and replace | | Strong pulsation | No dampener | Install one | | Motor dead | Power/capacitor | Electrical check |
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