Sanitary Butterfly Gasket (Viton)

Model: PSF-06

PSF-06 is a flanged (butterfly) gasket made of VITON (FKM) used at sanitary tri-clamp connections. The flanged structure with anti-displacement ridges fixes the assembly position, and it is used for sealing organic-solvent and high-temperature lines in pharmaceutical, biotechnology, chemical, food and beverage, and secondary battery processes where EPDM is not suitable.

Sanitary Butterfly Gasket (Viton) PSF-06

Frequently Asked Questions

How do I choose between VITON and EPDM/silicone gaskets?
EPDM is standard for water, hot water, and weakly alkaline fluids; silicone is standard for food and dairy lines across a wide temperature range. VITON (FKM) offers broader chemical resistance and is selected for hydrocarbon fluids, certain organic solvents, and high-concentration alcohol lines that are difficult to handle with elastomers. Tell us the fluid and temperature in use and we will review the appropriate material.
What is the operating temperature range of VITON?
Standard VITON (FKM) is usable in approximately the -20 to 200 degree C range. For very low temperatures or environments significantly above 200 degree C, a separate material review is required. Share the operating conditions and we will advise on suitability.
How does it differ from a PTFE gasket?
PTFE offers even broader chemical resistance than VITON, but as a fluoropolymer rather than an elastomer it has low elastic recovery and tends to creep after tightening. VITON keeps elastomer-style elastic recovery while extending chemical resistance, giving it the advantage of being easier to manage than PTFE in repeated disconnect-and-reconnect environments.
How is the size selected?
Sanitary gaskets are supplied in tri-clamp standard sizes. Tell us the clamp size in use and we will prepare a matching specification.