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FFKM-118 Perfluoroelastomer (FFKM) O-rings


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7/8" ID X 1-1/16" OD X 3/32" Width

Description: Perfluoroelastomer (FFKM) O-rings

Perfluoroelastomer (FFKM) is most commonly known by the DuPont trade name Kalrez®. Perfluoroelastomer compounds offer the widest range of chemical and solvent resistance as well as very high operating temperatures (up to 428° F / 220°C).

The price of products made from Perfluoroelastomers tend to be very high due to the raw material cost, so this polymer is used for specialty applications only. The low temperature range is only -20° to +20°F depending on the compound. Thermal expansion needs to be considered when using Perfluoroelastomers at elevated temperatures.

The O-ring Store is a distributor of O-rings, Seals, Seal Kits, Hydraulic Seals, and Pneumatic seals for many applications. We provide seal products to a variety of industries and customers such as: Automotive, Pool, Spa, Pump, Restaurant, Washer, Hydraulic, Coatings, construction equipment, material handling, industrial plant applications, farming, and logging equipment. We do not imply that these kits are original replacement parts.

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Stock O-Rings in over 20 different compounds and durometers the following six are the standard rubber materials in a range of durometers (Shore A) hardness to satisfy practically any service condition:

Viton® / FKM: Fluorocarbon (Viton®) exhibits exceptional resistance to chemicals, oils, temperature extremes (-13°F to +446°F), low compression set, low gas permeability and excellent aging characteristics. Applications include: aircraft engines, automotive fuel handling systems, and chemical processing industries. FKM is also suitable for high vacuum applications. It is not recommended for exposure to ketones, alkalis, and Skydrol® fluids. Custom compounds are available with improved chemical and low temperature resistance.

Buna-N / Nitrile / NBR: Nitrile (Buna-N) is the most widely used elastomer due to its excellent resistance to petroleum products, operating temperature range (-40°F to +257°F) and one of the best performance-to-cost values. It's an ideal material for aerospace, automotive, propane and natural gas applications. Special Hydrogenated Nitrile (HNBR) compounds can improve resistance to direct ozone, sunlight, and weather exposure while increasing temperature range to +300°F.

Ethylene-Propylene / EPDM: EPDM has outstanding resistance to heat, water and steam, alkali, mild acidic and oxygenated solvents, ozone, and sunlight (-40ºF to +275ºF); but it is not recommended for gasoline, petroleum oil and grease, and hydrocarbon environments. This popular rubber compound is usually the first choice for low torque drive belt applications.

Fluorosilicone / FVMQ: Fluorosilicone (-75º to +400ºF) combines the good high and low temperature stability of silicones with the fuel, oil, and solvent resistance of fluorocarbons. FVMQ is unparalleled for aerospace fuel systems, auto fuel emission control systems and to meet or exceed government, military, aerospace, automotive, industrial and commercial specifications. However, due to relatively low tear strength, high friction and limited abrasion resistance of these materials, they are generally not used in dynamic applications. They are also not recommended for exposure to brake fluids, hydrazine, or ketones.

Silicone / VMQ: In the Silicone family, you will find compounds which are superior as static seals in extreme temperature conditions. Standard compounds handle operating temperatures -85º to +400ºF. Silicone compounds are popular in food and medical applications because they are very clean and do not impart odor or taste. Special Phenyl silicones can be used down to -148°F.

Neoprene® / CR: Neoprene (-40º to +250ºF) is reasonably priced and features good resistance to petroleum oils, ozone, sunlight and oxygen aging, relatively low compression set, good resilience and outstanding physical toughness. It is the preferred sealing material for the refrigeration industry because of its resistance to ammonia and Freon®.