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Back-Up Rings

 

Hard rubber molded contoured Back-Ups are routinely produced in a 90 durometer Nitrile and Viton. This provides sufficient elasticity to permit stretching over the major diameter of a piston and then snapping back into the gland groove cut into the piston.  90 durometer has sufficient hardness to resist extrusion of the softer elastomeric O-Ring performing the actual sealing function against the high pressure liquid or gas.

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Copyright © 1997-2003  Marco Rubber & Plastic Products, Inc.
334 Clark Street  *  North Andover, MA 01845  USA
1-800-775-6525  Fax: 978-688-6915
e-mail Marco Rubber