Back -up rings are used in conjunction with O-rings for both static and dynamic sealing sealing applications.
They prevent extrusion of the O-ring when it is subjected to high pressures, or when the extrusion gaps are excessive.
Back-up rings are in stock and ready to supply in Nitrile and PTFE materials .
Quad-rings are four-lipped seals with a specially developed sealing profile that actually provides twice the number of sealing surfaces as O-ring. It’s provide lower friction than an O-ring and due to tis square ctoss section, it resists sporal twist.
Quad-rings are available in all standard O-ring size of American Standards AS568A, as well as sustom seais for unique applications.