8-134 BLACK FKM 90D BACK-UP RING

Part number VBU90134 is an AS568-134 black Viton® (FKM) 90 Shore A Back-Up Ring measuring an inside diameter of 1.862 in (47.29 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 2.068 in (52.53 mm). A back-up ring installs on the low-pressure side of an o-ring to prevent extrusion into the clearance gap at elevated pressure.

This material stands up to engine and transmission fluids, aggressive chemicals, and chlorinated solvents. Viton® (FKM) is specified for outstanding high-temperature capability, excellent resistance to compression set and permeation. Published continuous service range is -15°F (-26.1°C) to 400°F (204.4°C). Applications involving hot water and steam or amines call for a different compound.

Common environments for this compound include chemical processing, oil and gas, and aerospace.

Order part number VBU90134, sold individually. Unit weight is approximately 0.7505 g and nominal inside diameter is listed as 1 7/8 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.