Ordered as S70212, this is an AS568-212 red Silicone 70 Shore A O-Ring measuring 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). The o-ring compresses into its gland to block fluid or gas migration across a joint.
Silicone is specified here for physiological inertness and low toxicity, exceptionally wide service temperature range. The compound resists dry heat, extreme heat and cold, and many oxidizing chemicals. The material carries a published service range of -80°F (-62.2°C) to 450°F (232.2°C). It is not the right choice where steam above its rated range or abrasive dynamic service are present.
It sees regular use in pharmaceutical manufacturing, food and beverage processing, and ovens and heated equipment.
Reference part number S70212 when ordering; the item is sold individually. Unit weight is approximately 1.064 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 RED SILICONE 70D 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