Saunders EX Endurance Diaphragm features two-piece leaf-type construction, consisting of a wetted modified PTFE face with a non-wetted fabric reinforced Silicone backing cushion. This silicone backing offers exceptional resistance to high temperatures for long periods of time.

The silicone backing offers much more resistance to high temperatures compared to EPDM. EPDM rubbers suffer damage with prolonged exposure to temperatures encountered during heat sterilization. This damage results in loss of resiliency and resistance to compression set and reduce the ability of the EPDM backing to properly energize the wetted PTFE diaphragm face.


  • Outstanding high-temperature performance and resistance to long-term exposure to elevated temperatures (175°C)
  • Ideal for steam distribution and supply, sterile barrier, and block-and-bleed applications
  • Improved seal-to-atmosphere performance and reduced requirements for re-torquing of fasteners after thermo cycling
  • Reduced creep and flow at elevated temperatures means less deformation

About Saunders®

Founded in 1933 after P K Saunders invented the original diaphragm valve in 1928, Saunders® has been an industry leader in providing solutions where resistance to corrosion, abrasion, contamination, and trouble-free operation are imperative. With Saunders® simplicity in design and many years of innovation, Saunders® diaphragm valve technology can handle a wider range of fluids than any other valve type. Saunders range of product offerings includes a complete line of manual and linear actuated diaphragm valves, both weir and straight through type, aseptic diaphragm valves and blocks solutions, non-return check valves, and ball valves. Product selection tools for the Biopharma industry are also offered.

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Manufacturer: Saunders
Device: EX Endurance Diaphragms

As the Mid-Atlantic representative for Saunders, Eastern Controls has the necessary training and experience to effectively demonstrate this device and answer questions you may have about its operation. For more information about this product, the manufacturer, and/or other products offered by the manufacturer that may benefit your process operations, please contact our sales group.