Contents
If process liquid leaves an AODD pump air exhaust, stop the pump and contain the leak. A torn diaphragm or loose piston plate may connect the liquid and air sides. Isolate before inspection; do not run it to test.
What does liquid at the exhaust mean?
Determine whether the liquid is pumped product or condensed water. Note color or residue without touching or inhaling it. Outlet bubbles or low flow can accompany a diaphragm fault, but do not prove one. Follow the exact model manual.
Use the observation to guide inspection
Swipe the table horizontally to view all columns.
| Observation | Check first | Next action |
|---|---|---|
| Product at the muffler | Diaphragm and piston plate | Isolate and inspect by the manual. |
| Bubbles in discharge | Diaphragm and inlet joints | Check for internal breach and inlet air. |
| Leak returns after repair | Parts, clamping and duty | Verify fit, installation and operating history. |
Safe isolation and inspection checklist
- Stop the pump, bleed compressed air, isolate both liquid lines and relieve pressure. Follow site lockout rules.
- Contain the liquid. Use the protective equipment and decontamination procedure required for that fluid.
- Open only as the model manual permits. Inspect both diaphragms, backing pieces, plates, seals and the air side.
- Record photos and part numbers. Reassemble to specified sequence and torque; restart only when safe.
Which parts should a buyer request?
Send the nameplate, full model and serial, old part numbers, material, liquid, temperature and failure photos. Check the exact bill of materials before choosing a diaphragm or wet kit. If liquid entered the air side, inspect its valve and muffler. Price depends on confirmed parts and repair scope; request a matched quote.
Frequently asked questions
Can I run the pump if only a little liquid appears at the exhaust?
No. Contain the liquid, isolate the pump and confirm the fault before restart.
Does liquid at the exhaust always mean a torn diaphragm?
No. A loose plate can also leak; condensation can look similar. Inspect by the model manual.
Example WILDEN wet kit – verify fit | Diaphragm material guide | Request matched parts