BUNA-N — Nitrile rubber also known as NBR, Buna-N and Acrylonitrile Butadiene Rubber. It is a synthetic rubber copolymer of Acrylonitrile (CAN) and Butadiene.

BUNA-N material will handle most food, dairy, beverage and sanitary services. It is used in the food processing industries, has excellent resistance to compression set, tear and abrasion.

It has good resistance with acid and milk alkali. Can handle most vegetable oil service. It’s has a low cost and lends itself to a be a throw away consumable. Rated at -30° F to 255° F.

Colors are black, white, and blue. This has FDA compliance.

EPDM – Rubber ethylene propylene diene monomer rubber. This is a type of synthetic rubber an elastomer.

EPDM is very good for hot water and steam service up to 300°F. EPDM is very abrasion resistant. It has excellent resistance to ozone, sunlight and de-ionized water.

EPDM also has good tensile strength and flexibility. It has good resistance to mild acids, alkalis and alcohols.

Rated at -55°F to 300°F. Colors are Black, White and Blue. This has FDA, USP class VI Compliance.

FKM – Fluoroelastomer that has excellent mechanical, chemical, and heat resistance. FKM is particularly well suited for hot fatty oil products. It works extremely well in most applications that have high temperatures and steam. FKM is especially good for hard vacuum service because of its high molecular weight and low gas permeability. It has good flexibility, 0°F to 400°F under continuous duty. It will take higher temperatures for short periods of time.

Rated at -2°F to 440°F. Colors are Black, White and Blue. This has FDA, USP class VI Compliance.

PTFE – Polytetrafluoroethylene Fluoropolymer material have been a standard in the industry. It has excellent performance properties in almost all conditions. It has very good to excellent resistance to heat, steam, abrasion, acid, petroleum oil and vegetable oil. Good Electrical Properties and does not age. This has the lowest coefficient of friction properties. Rated at -320°F to 500°F. PTFE is a material that can Cold Flow.  When cycled through heat and then cooled down in process lines, PTFE gaskets may not return to the original configuration and it can continue to compress as the cycling continues. This can allow leakage if clamp torques are not maintained. Colors are White and Blue. This has FDA, USP class VI Compliance.