Q-439 FLUOROELASTOMER 75 Q RING

Ordered as QV70439, this is an AS568-439 black Viton® (FKM) 75 Shore A Quad-Ring measuring an inside diameter of 6.475 in (164.47 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 7.025 in (178.44 mm). The quad-ring provides a dual sealing band on each contact face for improved reliability.

The compound resists aromatic hydrocarbons, engine and transmission fluids, and petroleum oils and fuels. Viton® (FKM) is specified for outstanding high-temperature capability and the industry benchmark where nitrile reaches its thermal limit. Rated temperature range runs from -15°F (-26.1°C) to 400°F (204.4°C) in continuous service. Applications involving ketones and esters or hot water and steam call for a different compound. The profile itself contributes two sealing bands per contact face rather than one and a parting line located away from the sealing surface.

You will find this material specified across aerospace, oil and gas, and chemical processing.

Stocked as QV70439 and sold individually. Unit weight is approximately 40.413 g. Review your operating media and conditions against this specification before installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.