Temperature Chart

Temperature Chart

Temperature ranges are important in picking a gasket

Material Temperature Ratings

Gasket Material Temperature Range
Tuf-Flex®/Ansi-Flex -20ºF to 300ºF (-29ºC to 149ºC)
Tuf-Steel® -320ºF to 550ºF (-195ºC to 288ºC)
GYLON BIO-PRO® -346ºC to 500ºF (-210ºC to 260ºC)
GYLON® BIO-PRO PLUS -450ºF to 500ºF (-268ºC to 260ºC)
PTFE -100ºF to 500ºF (-38ºC to 260ºC)
Platinum Silicone -40ºF to 450ºF (-40ºC to 232ºC)
FKM Fluoroelastomer -30ºF to 400ºF (-34ºC to 204ºC)
EPDM (peroxide cured) -30ºF to 300ºF (-34ºC to 149ºC)
Buna -30ºF to 200ºF (-34ºC to 93ºC)

Rubber Fab's Sanitary Gasket Guidelines

Tuf-Flex® is the world's first unitized gasket, setting new standards for purity, performance and flexibility. A Tuf-Flex® Gasket's contact surface is PTFE unitized to an EPDM rubber inner core. This totally bonded construction provides a PTFE gasket with the mechanical characteristics, including memory, of an elastomer gasket. Designed to meet critical requirements in biopharmaceutical, ultra-pure water, WFI (water for injection) and difficult food and beverage processing.
GYLON® BIO-PRO PLUS™ is manufactured from our proprietary GYLON® style 3522 modified PTFE. GYLON® BIO-PRO PLUS™ delivers best in class performance across all critical factors such as compliance, chemical compatibility, seal-ability, creep and cold flow.
Tuf-Steel® is composed of a unique 50/50 blend of non-pigmented PTFE and 316L passivated and atomized stainless steel. Testing and years of documented application usage has demonstrated that Tuf-Steel® is the choice for perfect surface performance, outstanding durability and extended service life in both SIP (steam in place) and WFI (water for injection) applications. Tuf-Steel® is ideal for sanitary steam pipe connections in extreme temperatures ranging from -320°F to 550°F. The superior strength of Tuf-Steel® eliminates creep and cold flow providing a leak-free seal and preventing maintenance problems and system downtime.
PTFE is the material of choice whenever low temperature flexibility or gasket memory is not required and can remain in service for longer periods of time in both water and steam applications. PTFE is not recommended with large temperature variations due to creep and cold flow. PTFE has minimal extractables, has a low absorption rate and excellent resistance to process fluids.
Platinum Cured Silicone is the material of choice in sanitary water systems when PTFE is not feasible due to severely misaligned fittings, or if the cost of high pressure clamps does not outweigh the benefits of PIFE (extended service life).
FKM Fluoroelastomer and EPDM compounds are specified by many of our process equipment manufacturers. They are generally suitable for these applications, however, service life must be considered and a preventative maintenance program be implemented to mitigate degradation.
GYLON BIO-PRO® is a safe sealing solution with its modified and restructured PTFE material, pre-formed and stress controlled, for all Tri-Clamp® applications. It is also dimensionally stable and resists intrusion.
Buna is the last choice in most applications due to temperature limitations and does not pass U.S. Pharmacopeia Class VI Certification and Cytotoxicity.