Back-Up Rings

Daemar Inc. Supplying the pace of industry 1.800.387.7115

F O R U M

Back-Up Rings

Back-up rings are washer-like devices that are used to prevent a seal from extruding through any gaps while under pressure. These seals are installed in the downstream side of the gland. Back-up rings are not seals themselves, but are usually used in conjunction with O-rings in high-pressure applications (over 1500 psi) for support or as spacers.

Flat/Washer Style
Metric and Standard
Configuration: Solid, Split, Spiral Materials: PTFE, URETHANE, NYLON

Contoured Style
"Parback" style
Material: Nitrile 90 Durometer, Fluoroelastomer 90 Durometer

574 Style ("Standadr Only")
Molded of a 90A Durometer Buna-N Rubber. The 574 Style dished Cross section back-up rings provide excellent extrusion resistance. Stretched for installation, they return quickly to their original size for easy installation.
PLEASE NOTE: Sizes (Dash NO.) Corresponds to standard o-ring numbers.

Technical Resources

DMR Seal Design Sheet

DMR_ISO9001_2000_logo

Copyright © 1996-2009. All rights reserved.
Daemar® Inc. / DMR™ / Fiber-Lube™ / Quick-Turn™ are trademarks of
Daemar® Inc. All material on the site, including, without limitation,
text, logo, software, photos, video, graphics, music, and sound, are
protected by copyright laws, both as individual works and as a
collection. No reproduction authorized in any form electronic or
otherwise without specific written permission.

This site includes links to other internet sites solely as a convenience
to users. Daemar, Inc. does not endorse any such linked sites or the
information, material, products and services offered.