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.
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, Caterpillar.
Please check the catagory for detail.
Virgin PTFE, PTFE+bronze, PTFE+carbon, PTFE+glass, PTFE+graphite, POM, etc.
Brown, Green, White, Black, Blue, etc.
This seal can be provided with slash cut or no cut.
|Method of payment ||T/T (bank account, paypal,western union)|
|Delivery time||5 to 7 working days, 2 days for in stock|
|Packaging||plastic film for inner packaging and cartons for outer packaging|
|Export market||South Asia, Southest Asia, Europe, South America, North America, Africa, Middle East, Ausrialia|