APG stocks the VITON75212, an AS568-212 black Viton® (FKM) 75 Shore A O-Ring with an inside diameter of 0.859 in (21.82 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 1.137 in (28.88 mm). An o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.
Viton® (FKM) is specified here for very low compression set at elevated temperature, excellent resistance to compression set and permeation. Expect good resistance to many acids, aromatic hydrocarbons, and chlorinated solvents. Continuous operating temperature is published at -15°F (-26.1°C) to 400°F (204.4°C). It is not the right choice where low-molecular-weight organic acids or hot water and steam are present.
Maintenance and OEM teams specify it across oil and gas, high-temperature process equipment, and semiconductor equipment.
Reference part number VITON75212 when ordering; the item is sold individually. Unit weight is approximately 1.454 g and nominal inside diameter is listed as 7/8 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.
description -212 BLACK CHEMOURS VITON 75D O-RING
uf_description2 0.139" (3.53MM) CS X 0.859" (21.82MM) ID
Actual_CS 0.139 inch (3.53 mm)
Actual_ID 0.859 inch (21.82 mm)
Actual_OD 1.137 inch (28.88 mm)
ProductCode Description O-Rings - Bulk - Commodity