VBU90430 is an AS568-430 black Viton® (FKM) 90 Shore A Back-Up Ring supplied with an inside diameter of 5.1 in (129.54 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 5.65 in (143.51 mm). In service, this back-up ring allows a standard o-ring to operate at higher pressures than it could unsupported.
The compound resists many acids, petroleum oils and fuels, and chlorinated solvents. That behavior comes from the compound itself: Viton® (FKM) is valued for long service life in hot, chemically aggressive environments, excellent resistance to compression set and permeation. Continuous operating temperature is published at -15°F (-26.1°C) to 400°F (204.4°C).
It sees regular use in oil and gas, chemical processing, and semiconductor equipment.
This item is sold individually under part number VBU90430. Unit weight is approximately 12.627 g. Review your operating media and conditions against this specification before installation.
Description 8-430 BLACK FKM 90D BACK-UP RING
Actual Cross Section 0.275 inch (6.99 mm)
Actual Inside Diameter 5.1 inch (129.54 mm)
Actual Outside Diameter 5.65 inch (143.51 mm)
Measurement System Imperial
Product Category O-Rings - Backup Rings