Contoured Back Up Ring

Standard 90 Durometer Shore A Nitrile Backup Rings. Seal Size Selector Request a Quote Inch -.

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Back-Up Rings Back-Up Rings Materials.

Contoured back up ring. All Seals is a world. Anti-extrusion contoured back-up rings are used in dynamic and static sealing environments. Understanding O-ring Extrusion Back-up rings are generally required any time hydraulic pressures exceed 1500 psi.

Extrusion and extend the life of an O-Ring in either static or dynamic sealing applications. Contoured Back-Up Rings are designed to help prevent. HomeAboutCustom RubberO-RingsSealsMachined PlasticsPrecision ProductsMaterialsTechnicalServicesContact.

Eastern Seals supplies a wide range of back-up ring profiles and materials to complement each seal type and to suit every application. SHOP FOR BACKUP RINGS Contoured Backup Rings. Contoured back-up ring for O-rings reduces damage or drag out during assembly and reduces risk of O-ring extrusion under pressure.

Traditionally PTFE has been used but in recent years contoured elastomer rings have been developed and are now widely used. They can come in the form of a solid ring a split ring or even a spiral ring depending on the environment that the back-up ring. Parco makes hard rubber contoured back-up rings for use with O-rings in high-pressure applications.

Pressure applied evenly to both sides of a seal normally has no effect on sealing performance. Počet řádků 348 Rubber Contoured Back-Up Ring Size Chart. Our standard 800 Series Rubber Contoured Back-up Rings are manufactured from a 90 durometer material.

Range Nitrile -40C to 120C VitonFluorocarbon -26C to 204C PTFE -268C to 232C PEEK -70C to 260C Hytrel -54C to 149C Urethane -54C to 105C Part Numbers. N8-90 Nitrile 90 Duro Contoured Backup Rings. They can also be used when mating part clearances are not controlled tightly.

For material information please review our engineering centers material reference manual. This is the traditional anti-extrusion device for O-Rings and other seals. Providing consistent contact with the O-Ring.

Compounds for use in other fluids and for temperatures up. When high pressures are exerted on the O-ring its soft rubber material can be forced into the clearance gap causing the O-ring to extrude see our O-ring brochure for examples of O-ring failure. At Global O-Ring and Seal we stock contoured elastomeric back-up rings in Nitrile 90 Durometer and Viton 90 Durometer.

By making a contoured back-up ring the gap behind the o-ring was eliminated and the o-ring did not suffer any damage in pressures up to 20000 psi. Parco back-up rings are more reliable less costly and easier to use than leather or Teflon. Spiral Cut 28782 Solid Flat 27595 Scarf Cut 28774 Solid Contoured Butt Cut.

Contoured backup rings were developed primarily for service in petroleum based hydraulic fluids at -4C to 121C -40F to 250F. Wherever possible use two back-up rings one on each side of the O-ring. The part number corresponds to AS568D Dash for a proper fit.

Solid Contoured Butt Cut Back-Up Rings Back-up rings are plastic or rubber rings used to prevent the O-ring from entering the clearance gap. Parkers Parbaks will not collapse or cold fl ow if used. Contouring to Support the Primary O-Ring.

The contoured back-up rings slightly concave face on one side provides uniform contact with the entire diameter of the O-Ring. In both cases they are capable of extending the useful life of O-Rings. When a pressure difference is anticipated elastomer selection must also consider differential pressure resistance.

Parco is a leading supplier of contoured rubber back-up rings for use with O-rings in high-pressure applications. Parbaks should be installed with the contoured face against the O-ring but reversal does no harm. Sizes correspond with AS568 O-Rings.

V8-90 Viton 90 Duro Contoured Backup Rings. The Contoured Back-Up Ring has a concave surface. Using two back-up rings is recommended whenever possible even in single-acting applications.

The standard 90 durometer nitrile product provides the maximum benefits in backup ring service. Back-up rings for O Rings can be contoured or flat depending on the design requirements of the sealing system. We can also provide contoured backup rings in other materials by request.

Contoured back-up rings are used in both dynamic and static sealing environments as anti-extrusion devices. If only one back-up ring is used the O-ring should be placed between it and the source of pressure. This ensured the performance of the application in some of the most demanding high-pressure scenarios.

We hold large stocks of Contoured rings in both Nitrile and Viton. 800 Series Standard Nitrile.

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