Ethylene Propylene aka EPDM is a popular choice for many of our customers.  Known for having excellent chemical resistance properties and working at a temperature range of -60°F to 250°F, EPDM is an ideal choice for many devices within the medical, industrial, and other markets. 
 
One consideration when requesting this particular o-ring is a peroxide versus sulfur curing option. Sulfur is our standard curing option because this type of O-ring has a wider durometer (hardness of rubber) range with our lowest opening pressures.  If sulfur is not an option for your application criteria, we offer peroxide cured.  In our experience, peroxide cured o-rings hold up better against certain solvents versus the sulfur cured option, but the o-ring’s durometer must be harder.  And, the combination of a really strong o-ring with an ultra low spring pressure (such as 5 PSI and lower) does not always work well together.  In order to meet your specific design criteria, we must know all chemicals coming into contact with the valve, as well as your PSI requirements.  Sharing this information ensures we get the perfect o-ring, durometer, and curing combination, in addition to the valve’s opening PSI and plastic body material.  We can also send samples, if necessary.
 
To learn more about the function, importance, and many possibilities we offer with all of our o-rings – EPDM, Buna-N (Nitrile), Viton®, Silicone, Fluorosilicone, Aflas, Kalrez®, and others – click here.
 
We have a seemingly endless amount of solutions when it comes to building the right valve for your application.  To get started, visit www.smartproducts.com or call (800) 338-0404.