Rubber Fab’s standard sanitary gaskets come in a variety of sizes and elastomers, including Buna-N (NBR), EPDM, FKM (Viton), PTFE, and Platinum-Cured Silicone. Used in both the Food & Beverage and Pharmaceutical industries, these standard sanitary gaskets are reliable solutions for applications where cleanability, seal integrity, and compliance matter.

In sanitary service, material choice is critical. EPDM sanitary gaskets are widely used due to excellent steam resistance, good flexibility, and strong performance in aqueous and CIP/SIP environments. EPDM sanitary gaskets typically perform in continuous service from approximately -40°F to 300°F (-40°C to 149°C), with short-term exposure to steam often tolerated depending on the specific compound and cycle profile. Buna offers a cost-effective option for oils and some hydrocarbons, while FKM provides higher temperature and chemical resistance. Platinum Silicone is favored for flexibility, low extractables, and cold-room performance, though it has more limited chemical resistance than PTFE or FKM.

Sanitary Tri-Clamp Gaskets

What is a tri-clamp gasket? A tri-clamp gasket (also called a Tri-Clamp or Tri-Clover gasket) is a ring-shaped seal installed between two sanitary ferrules and compressed with a clamp to create a hygienic, crevice-free joint. Tri-clamp gaskets are designed to meet sanitary standards, allowing easy disassembly for cleaning while maintaining a smooth, flush bore to reduce entrapment and biofilm risk. In short, tri-clamp gaskets are the sealing element that completes a clamp-style sanitary connection in process piping for dairy, beverage, brewery, biotech, and pharmaceutical systems.

PTFE material properties and temperature ranges for sanitary applications: PTFE tri-clamp gaskets and other PTFE sanitary gaskets are prized for broad chemical resistance, ultra-low extractables, and a nonstick, low-friction surface that helps minimize product adhesion and simplifies cleaning. PTFE is chemically inert to most acids, bases, solvents, and CIP chemistries, making it suitable for aggressive cleaning regimes and high-purity production. Typical continuous-service temperature range for PTFE standard sanitary gaskets is about -100°F to 500°F (-73°C to 260°C), with excellent thermal stability and minimal property change across this range. PTFE has very low moisture absorption and maintains seal integrity in a wide array of media; however, it is less elastic than elastomeric sanitary gaskets and can exhibit cold flow (creep) under sustained load, which influences installation and torque practices.

Comparison: PTFE Tri-Clamp Gaskets vs. other elastomers used in sanitary gaskets: Compared to elastomers such as EPDM sanitary gaskets, Buna, FKM, or Silicone, PTFE tri-clamp gaskets offer superior chemical resistance and higher maximum temperature capability. This makes PTFE a strong choice for processes using aggressive solvents, oxidizers, or strong caustics/acids, and for repeated hot CIP/SIP cycles. However, because PTFE is rigid and has lower compressibility, installation considerations differ: tri-clamp gaskets made from PTFE often require more precise ferrule alignment, careful clamp torque, and sometimes the use of envelope or composite designs to improve compliance. Elastomeric sanitary gaskets like EPDM compress readily, provide forgiving seals against minor misalignment, and are easier to install, but they may swell or degrade in certain chemicals and typically have lower upper temperature limits (for example, EPDM around 300°F/149°C continuous, FKM around 400°F/204°C, and Silicone around 400°F/204°C depending on grade). In summary, PTFE tri-clamp gaskets maximize chemical resistance and temperature range, while elastomeric standard sanitary gaskets maximize flexibility, sealing ease, and resilience.

Sanitary Tri-Clamp Gaskets: Overview

Rubber Fab offers sanitary tri-clamp gaskets in multiple materials to fit application needs, including PTFE, envelope designs, and a full range of elastomers. These standard sanitary gaskets are available in common sizes for ASME BPE and 3-A compatible ferrules, ensuring compatibility across dairy, brewing, food, beverage, and pharma systems. Tri-clamp gaskets should be selected based on media chemistry, temperature profile, cleaning method (CIP/SIP), and regulatory requirements. When choosing PTFE sanitary gaskets, consider creep and installation technique; when choosing elastomers like EPDM, consider compatibility with oxidizers and high-pH cleaners and the intended steam exposure.

Flanged Gaskets

For applications requiring bolted flange connections rather than clamps, Rubber Fab provides flanged sanitary gaskets designed to maintain hygienic flow paths and withstand repeated disassembly for cleaning. Options include PTFE and elastomer blends to balance chemical resistance, seal recovery, and torque retention. As with tri-clamp gaskets, proper material selection ensures durability and compliance in sanitary service.

Unique Style Gaskets

Rubber Fab’s unique style sanitary gaskets address specialized needs, such as envelope PTFE designs that combine a PTFE-wetted surface with an elastomer core for improved compressibility, or screen and orifice configurations for process control and filtration. These standard sanitary gaskets extend the capabilities of tri-clamp gaskets by integrating functions like sampling, metering, or particle retention while preserving hygienic design principles.

Details

Whether selecting EPDM sanitary gaskets for steam-in-place resilience, FKM for solvent resistance, Silicone for flexibility at low temperatures, or PTFE sanitary gaskets for broad-spectrum chemical resistance and high-temperature stability, Rubber Fab’s portfolio of standard sanitary and tri-clamp gaskets supports a wide range of validated sanitary applications. Consult product data and industry standards to align gasket choice with process media, temperature, and cleaning regimen, and always verify clamp torque and ferrule alignment to maintain long-term seal integrity.