High Pressure Refrigerant Pump Corrosion and Design Question

[cmcgonag]

I need a pump that can pump pressurized liquid R134a or equivalent with a a low possibility of a two phase mixture around a closed loop. The pressure on the inlet side may be as high as 50 psi and the outlet may need to be as high as 200 psi. I need a flow rate of around 1 gpm. Bigger is better in my case.

I heard that refrigerant will corrode some pumps synthetic parts and I should use a hydraulic diaphragm pump. Cost is an issue in my case as the device is just a prototype. Pump leakage is unacceptable as it is refrigerant and will boil as soon as it hits atmosphere.

Any ideas or sources of manufactures would be greatly appreciated. Thanks.

 

[micalbrch]

A hydraulic diaphragm pumps has the advantage that some gas does not matter. But the flow is rather low and one day the diaphragm will fail. Nevertheless check "metering pump" in the internet. These companies sell diaphragm pumps for low capacities. Another option is HANSEN TECHNOLOGIES (

http://www.hantech.com).

I do not work with them! They are experts for refrigeration valves and have pumps, too.