Check Valve Type Selection 1

[JEP109]

Is there a particular type of check valve that is preferred on the discharge side of an oil-flooded screw compressor. We are currently thinking that a "swing check" type would suffice but I am wanting to get a second opinion on the matter. Here is a short explanation on the setup of part of the system. There will be 2 oil-flooded screw compressors, one on-line and the other spare. The maximum discharge should be around 280 F at about 75 psia. On the other hand for the lubrication system we have "piston" check valves, any thoughts on this? Any feedback would be of great help, thanks!

 

[SNORGY]

If you Google "The Humble Check Valve",a pretty good Power Point Presentation by Geoffrey D. Stone comes up.

Similarly:

https://wiki.umn.edu/pub/SMMFluidPower/FluidWorkshop/check_valve_selection.pdf

http://www.valmatic.com/pdfs/DesignSelectCriteriaCV.pdf

 

[JEP109]

Snorgy,
Thanks for the informational documents.

I was trying to see if anyone had any experience using a certain type of check valve for gas or liquid applications; and of any problems that have been encountered from using a particular type.

 

[gerhardl]

All check-valve types and constructions comes in different qualities and materials. Go for top quality with references. Same for compressur suppliers and compressors wih integrated check-valves. Some suppliers supply with top-grade valves, others with lower quality or types.

Generally:
Top-hinged swing check valves will more often than others give problems.
Swing check mid-section hinged (two half-moon formed parts bending back from center): better
Best: high quality disc check valves, with precisely guided disc. As example: Disco (Gestra) or competitors of equal quality.