Air-Operated Diaphragm Pump Pneumatic Dual Waste Oil Transfer Pump PTFE Diaphragm by Aluminum Alloy 1/2" Fluid Inlet & Outlet, 1/4" Air Inlet (48L/min)

I installed this pump on an older herkules spray gun washer, to replace the worn out and obsolete graco pump. It was straightforward to hook up, and has survived permanently exposed to lacquer thinner without any issue. The only downside to the pump is the muffler on it is a joke, so it was really loud, so I replaced it with a fiber filled sintered bronze muffler, which remedied the issue.

Did a great job while it worked. Got maybe a total of 150 hours out of it before it busted a seal and stopped working altogether. Difficult to disassemble. Disappointed it didn't last longer.

I set this pump up for hydraulic oil. I had it sucking through a 48” hose (1/2” dia) and pushing through 35’ of 1/4” hose. The pressure and flow were unusable and the setup was a failure. I tried air pressures from 80 psi to 140 psi.