When a system is operating under high pressure, there is a greater performance demand on the O Ring. When a subjected to a pressure, the O ring rubber tends to flow into the clearance gaps between the adjacent parts of the machine. At a lower pressure, the extrusion effect does not hamper the performance, however at a high pressure, this can damage the O rings.
Thus, in order to avoid permanent damage to the O rings at high pressure, special precautions such using an appropriate Back Up Rings need to be taken. Refer figure above.
We offer Back Up Rings made of several materials including PTFE, Polyurethane, Polyester, Nylon.