The opening pressure tolerance for our check valves with Polypropylene and Buna-N is +/-20%. Tolerance will vary depending upon material uses.
Many factors contribute to the valve's ability to handle pressure in the flow/check direction. Some examples of these factors are the durometer of the o-ring on the poppet and the flow rate of the fluid. We recommend that you sample the valve that you are interested in and test it in your application. Please contact a Product & Application Specialist for approximate fail range data.
All of the data provided were conducted with a 0.5 PSI spring and water.
Our standard order lead time is two weeks. Samples are available to ship sooner, often within 24 hours.
Due to the numerous chemicals that are in the market, we are not able to list a chemical compatibility chart that would encompass all of the available chemicals. Chemical Resistance Guide for Elastomers II and Chemical Resistance Guide for Plastics are the reference books we use internally. These guides are published by Compass Publications, La Jolla, California. Please feel free to contact us if you have any chemical compatibility questions.
We welcome any custom design challenges and our Engineers are available to discuss your needs and review any drawings. Please contact a Product & Application Specialist to initiate the process.
Yes, we do design custom springs for special applications.
Our check valves can handle a wide range of contact medium. Several factors will influence performance, such as, viscosity and temperature of the medium.
Yes, if particulate interferes with the sealing.
Our pumps are designed to be mounted in any direction or position; we recommend the use of grommets to reduce vibration.
No. Due to hysteresis, our valves do not open and close with the same pressures. (Hysteresis is a lagging of the effect.)
Products are custom assembled and therefore are not returnable except for non-conformance. Non-conforming product returns will not be accepted without an RMA# (Returned Material Authorization number) prior to Seller receiving any returned goods.