Q-123 FLUOROELASTOMER 75 Q RING

APG stocks the QV70123, an AS568-123 black Viton® (FKM) 75 Shore A Quad-Ring supplied with an inside diameter of 1.174 in (29.82 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 1.38 in (35.05 mm). A quad-ring resists spiral failure in reciprocating service thanks to its multi-lobe geometry.

It resists engine and transmission fluids, aggressive chemicals, and petroleum oils and fuels. That behavior comes from the compound itself: Viton® (FKM) is widely chosen for excellent resistance to compression set and permeation, the industry benchmark where nitrile reaches its thermal limit. The material carries a published service range of -15°F (-26.1°C) to 400°F (204.4°C). It should not be specified for service in ketones and esters or hot water and steam. The profile itself contributes a parting line located away from the sealing surface and two sealing bands per contact face rather than one.

You will find this material specified across chemical processing, semiconductor equipment, and aerospace.

Reference part number QV70123 when ordering; the item is sold individually. Unit weight is approximately 1.0831 g and nominal inside diameter is listed as 1 3/16 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.