Looking for a pressure relief valve? Our best example of a true relief valve can be found in Models #103 (pictured above in white polypropylene) and #109 (pictured in Ultem®). Both are available as a 1/8" Male NPT style. These valves are easily placed into plastic, metal, or other materials with absolutely no tubing involved. While the majority of our valves function as both a check and pressure relief flow control option, Models #103 and #109 are more suited to only relieve pressure. A lot of customers simply place this valve on the exterior of a tank, bladder, or other device. When pressure builds to a designated PSI level, this spring-loaded valve responds and allows flow of liquids/gasses slowly out of the application to prevent blow ups or damage. 
 
Like all of our valves, Models #103 and #109 are customized to fit your unique design criteria by plastic body material, o-ring material, and spring pressure. Specifically, these models are available to be molded into Polypropylene, Nylon, Polycarbonate, and Ultem®. The Model #109 is also available in Acetal. O-ring options include Buna-N, EPDM, Viton®, Silicone, and Fluorosilicone. Opening PSI levels for these valves range from 0.09 to 20 PSI.
 
To avoid damaging the #103 and #109 valves, we recommend you use a 7/16" wrench or socket with very low torque or manually twisting it into place. Once installed, the valve's low profile limits the possibility of it getting hit or caught on external objects.
 
For questions or to begin building your customized #103 or #109, contact a Product & Application Specialist at (800) 338-0404 or sales@smartproducts.com.

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