Need 1-2 PSI Check Valve Made of LDPE

Where have you looked so far?

There's a few million choices out there.

Bel Art LDPE Check Valve 5 16 to 1 4 hose barb - Check and Foot ... may be one.

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Did you look here:

SCV Series - Single Check Valves Arrive - Value Plastics

These are medical grade, but you didn't say if the valve was for O2 service.Some information would be nice.

Thank you....this product is for fluid and not gas. Will have various viscosity limits based on molecule being used but need valve to prevent fluid escape during travel in high elevations including plane flight. Product is a hybrid injection system for vaccines and medication, ABX, etc. Thank you for your help! MC

Back to square one.

Please define ALL the requirements of the valve.

We are engineers, not mind readers, nor procurement agents.

The site is sponsored by an organization that lists millions of products. We are an anomaly here.

Search GlobalSpec is the real force. It is a search engine that will help you find waht you need.

We just opine about the things we think might work.

There is much more about this valve to be discovered. Viscosity and molecular size have not been discussed.

Be prepared for many questions.

Your turn.