Back-up rings have been used in conjunction with O-rings in high pressure applications. A back-up ring is a rigid ring that holds an elastomeric seal to its designed shape and in its correct place. Back-up rings are most commonly used with O-rings to prevent extrusion at high pressures. When sealing the piston inside a pneumatic cylinder, a soft and flexible material is required to prevent leakage, but those same properties may leave the seal material vulnerable to being pulled out of its seat and then pinched or torn in the narrow space between piston and cylinder wall. If the joint cannot be redesigned, or a more resistant elastomer used, then the solution may be direct reinforcement with a stiffer material - in the form of a hard inner ring in this case.
In general terms, for dynamic applications over 100 bar, and static applications around 900 bar, back-up rings should be used.
Seal Materials: PTFE (Virgin Teflon).
Temperature Range: -50C + 200C
Pressure: up to 800 bar (80Mpa)
O Ring material: Nitrile, Viton.
Size Range :
We manufacture PTFE Back up Rings for upto 700mm cylinder bore & Rod diameter as per International Standard Size Chart.
Fields of Application :
The use of backup ring is must when any of the following operating conditions are present in a hydraulic cylinder.
when pressure is above 100 bars (10Mpa).
Extreme and frequent pressure variation.
Large tolerances between the components to be sealed or large radial sealing gap.
High temperatures above 120C.
Our products present divided into three series: 1 engineering machinery parts: mainly for earthemoving equipment spares. 2 mining machinery accessories: all kinds of crusher wear parts. 3 mechanical transmission parts mainly for industrial or heavy machinery.
We are the largest Ring Joint Gasket Manufacturer in Asia. At Asian Sealing Products, we manufacture 14 types of ring type joint gaskets with highest quality and we will ensure that the gaskets are delivered to the customers on time.
PTFE pall ring is developed on the basis of the PTFE raschig ring, It is to open one or two layers of rectangular holes in the sidewall,and the base material of the holes is not out of the sidewall but forms inward bending of blade.The same size of Pall ring and Raschig ring have the same surface area and porosity,
Supplier: Filter bag, rods, sheets, pipes, gaskets, skived sheets, tapes & films, compound pipes & fittings with steel linings, PTFE braid & piston rings, PTFE bearing slides, soft joints and filled PTFE articles
Supplier: Gasket, Seals, O Ring, Mechanical Seal, Cermic Ring, Carbon Bush, Graphite Alloy Bush Bearing, Nuclear Grade Graphite Seal Ring, Anti Extursion Cap Seal Ring, Braided Packing Rings, Grafoil Rings, Ptfe Ring, Rubber Seals ,astm A193 Gr B7, B7m Tud Bolt, Astm A 194 Gr 2h Nut,
Buyer: Grafoil, Rubber, Cnaf, Ptfe
Supplier: PTFE gasket, PTFE shaft, PTFE O ring, PTFE sheet, PTFE tube, PTFE rod, PTFE film, PTFE tape, PTFE Stirrer, PTFE joint gasket, teflon spacer, PTFE shaft seals, PTFE packing, PTFE products, expended PTFE tape, PTFE fiberglass Cloth, PTFE, mechanical seals, PTFE mechanical seals, PTFE pipe
We are leading manufacturer of PTFE seat ring. we have mass production for PTFE seat ring.
Supplier: PTFE / teflon parts, PTFE gaskets, ball valve seats, ball valve, oil free air compressor piston rings, piston rings, seals, bellows
Services: Project support for polymer manufacturing plants, processing plants and downstream polymer products plants
Buyer: PTFE/Teflon rods, sheets, hollows, PTFE powders, PTFE tubing
PTFE gasket.
