Why does DP miniature diaphragm pump leak during operation? How to fix?

DP series miniature diaphragm pumps may develop leakage problems during long-term operation. The main causes include diaphragm damage, loose connections and seal failures.

For body joint leakage, first tighten the screws with torque wrench (3-5N·m recommended). Persistent leakage requires replacement of EPDM rubber gaskets with clean contact surfaces.

Diaphragm leakage usually indicates fatigue cracks. Replace the diaphragm every 3000 hours using proper tools to ensure even compression. Pay attention to installation orientation.

Connection port leaks often come from deteriorated O-rings. Replace with fluoroelastomer O-rings of correct size and apply silicone grease during assembly. Damaged threads need complete fitting replacement.

Liquid discharge from vent hole suggests valve ball/seat wear. Clean ceramic balls with alcohol and resurface seats with special lapping compound when necessary.