1.Material : PTFE, teflon, Nylon, POM 2.Color : white, black,green,brown 3.Specification : according to customers'need

Specification:

Back-up rings are the most common anti-extrusion devices in dynamic sealing. They provide simple solutions to safely increase system function by positioning a more robust material adjacent to the extrusion gap,taking the seal’s place and providing a barrier against high pressures. Back –ups can be used to offset the reduced pressure rating effects of wear rings or to improve seal against pressure spikes,or to ensure seal performance at higher tempertures.

Quality Assurance:

DEF Seals manufacture high-quality back-ups to meet harsh sealing environment . Our seals are one of the best choice of spare parts of Hitachi, Kobelco, Kamastu, Hyundai, Caterpillar. Please check the catagory for detail.

Material Range:

Virgin PTFE, PTFE+bronze, PTFE+carbon,PTFE+glass,PTFE+graphite,POM,etc.

Color Range:

Brown,Green,White,Black,Blue,etc.

 Special Service:

This seal can be provided with slash cut or no cut.