What is the purpose of a Teflon backup ring when used with an o-ring?
What is a peek seal?
Polyetheretherketone (PEEK), an organic thermoplastic polymer, has excellent mechanical and chemical resistance properties that are maintained at high temperatures. PEEK seals can be heated, cooled, and heated again without degradation since they are composed of thermoplastic materials.
When should you use a backup ring?
Should I use a backup ring? Backup rings are used to improve the pressure resistance of a softer rubber seal to that of a 90 durometer seal material. Use our Extrusion Chart to determine if a backup ring is needed based on your seal hardness, gland clearance, and fluid pressure.
What is a Parbak ring?
The Parker Parbak is a supplement to pressure seals such as an O-ring. It is not a sealing ring in itself. The primary reason for the use of a back-up ring is to reduce the clearance gap on the low pressure side of an O-ring or similar type of seal.
How do backup rings work?
A Back-up Ring works by blocking or reducing the extrusion gap, thus preventing the o-ring from extruding. The use of a back-up ring increases the pressure and temperature capability of o-rings. Back-up Rings can be solid, split, spiral or contoured.
When would you use a backup ring?
Backup rings are commonly installed with rubber O-Rings to help improv their performance. These rings are designed to limit o-ring clearance gaps and be used in high pressure sealing situations greater than 1500 PSI. Using these rings will prevent the o-ring to become damaged or extruded causes failure of some systems.
Which side does the backup ring go on?
Back-up Rings can be used on both sides of the O-Ring if pressure is bidirectional. Gland widths should be widened to accommodate one or two Back-up Rings.
What is the purpose of a Teflon backup ring when used with an o-ring?
Teflon back-up rings are designed to prevent extrusion in rubber o-ring sealing systems. Rubber O-Rings generally serve as effective seals for dynamic and static applications in hydraulic and pneumatic systems equipment.