ANSI-FLEX GASKETS
Designed For Sanitary Process Industries
Rubber Fab ANSI-Flex Gaskets
Rubber Fab ANSI-Flex gaskets are designed for ANSI 150# rated sanitary flange connections, making them the right choice wherever a process system transitions between sanitary clamp fittings and ANSI flanged piping. Each gasket features a PTFE/EPDM composite construction — a light blue PTFE contact face bonded to a black EPDM core, combining the chemical resistance of PTFE with the flexibility and compression memory of an elastomer for a reliable seal even on slightly misaligned flanges.
Available in nominal sizes from 1/2" through 8", with 4-hole bolt patterns on sizes up to 3" and 8-hole patterns on 4" and above to match standard ANSI 150# flange drilling.
| Pipe Size | Part # | OD | ID | THK | C | D | PCD | # Holes | E |
|---|---|---|---|---|---|---|---|---|---|
| 1/2" | FF-AF-E-050-150#-.197 | 3.386 | 0.708 | 0.197 | 1.181 | - | 2.362 | (4) .630 | 1.654 |
| 3/4" | FF-AF-E-075-150#-.197 | 3.78 | 0.866 | 0.197 | 1.181 | 1.654 | 2.756 | (4) .630 | 2.047 |
| 1" | FF-AF-E-100-150#-.197 | 4.134 | 1.142 | 0.197 | 1.456 | 1.968 | 3.11 | (4) .630 | 2.362 |
| 1 1/4" | FF-AF-E-125-150#-.197 | 4.528 | 1.496 | 0.197 | 1.811 | 2.323 | 3.504 | (4) .630 | 2.756 |
| 1 1/2" | FF-AF-E-150-150#-.197 | 4.921 | 1.693 | 0.197 | 2.087 | 2.677 | 3.858 | (4) .630 | 3.11 |
| 2" | FF-AF-E200-150#-.197 | 5.906 | 2.126 | 0.197 | 2.52 | 3.268 | 4.764 | (4) .748 | 3.898 |
| 2 1/2" | FF-AF-E-250-150#-.197 | 6.89 | 2.716 | 0.197 | 3.189 | 3.976 | 5.512 | (4) .748 | 4.646 |
| 3" | FF-AF-E-300-150#-.197 | 7.402 | 3.15 | 0.197 | 3.622 | 4.409 | 5.984 | (4) .748 | 5.118 |
| 4" | FF-AF-E-400-150#-.197 | 8.898 | 4.055 | 0.197 | 4.882 | 5.827 | 7.48 | (4) .748 | 6.614 |
| 6" | FF-AF-E-600-150#-.197 | 10.906 | 6.024 | 0.197 | 6.772 | 7.717 | 9.488 | (8) .866 | 8.346 |
| 8" | FF-AF-E-800-150#-.197 | 13.386 | 7.874 | 0.197 | 8.74 | 9.685 | 11.732 | (8) .866 | 10.68 |
About Gasket Materials
Tuf-Flex®: 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.
Tuf-Steel®: Tuf-Steel® is composed of a unique 50/50 blend of non- pigmented PTFE and 316L passivated and atomized stainless steel. Testing and seven 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: 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 andsteam 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: 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 PTFE (extended service life). See Rubber Fab’s Platinum Silicone Hygienic Seal literature for more information.
FKM & EPDM: 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.
Buna: Buna is the last choice in most applications due to temperature limitations and does not pass U.S. Pharmacopeia Class VI Certification and Cytotoxicity.