Back-up Rings

PTFE back-up ring is mainly used to bear greater pressure in cylinder, hydraulic system, or valve to keep effective seal function. It can prevent O-ring from extrusion and increase the pressure that O-ring resist.
A&S Seals Co., Ltd. is a global supplier of Back-up Rings, ESCORT Seals, A&S Seals and many more. focusing on the various brands of seals supply