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Back-Up Rings. Parker O-Ring Handbook. Back-Up Rings. 6.1 Introduction. Parker’s ParbakÂ® back-up rings help prevent extrusion in high pressure service and …
Back-up rings are anti-extrusion elements designed to prevent the migration of sealing material into the extrusion gap under the system pressure. They are open or closed shapes for snap assembly made of a wide range of compounds which are highly resistant to thermal or mechanical stress.
May 1, 2015 – Modular back-up rings disperse pressure from the seal throughout the gland to fill the extrusion gap and protect the seal (see Figure 10-1).
Parker ParbakÂ® Contoured Continuous Back-up Rings. The Parker Parbak is a supplement to a pressure seal such as an O-ring. It is not a seal in itself.
Darcoid has Back-up rings made from 90 durometer rubber, PTFE and plastic to keep to O-ring from extruding into the clearance gap causing seal failure. Parker’s …
Parker Back-Up Rings. Back-up rings are the most common anti-extrusion devices in dynamic sealing. They provide simple solutions to safely increase system …
Parbak Backup O-Rings From Parker. Parker offers the Parbak line of O-rings, which are often used in pairs, one on each side of the O-ring. They are:.
-40Â°C to 121Â°C (-40Â°F to 250Â°F), Parker’s standard Parbak N0300-90 and. N1444-90 compounds provide the maximum benefits in back-up ring service.
For each 2-xxx series O-ring we can offer a Parker ParbakÂ® back-up ring to fit. This is particularly important where large clearance gaps and/or high pressures …
Parker’s 5100 Series back-up rings offer extrusion resistance up to 7,000 psi for dynamic applications and up to 20,000 psi for static applications. They are …
VI ParBakâ„¢ Back-Up Rings. VII Compatibility Tables for Gases,. Fluids, Solids. VIII Specifications. IX. Sizes. X. Appendix. XI Index. Parker Offer of Sale. Parker.