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Shanghai Oil Seal Co.,Ltd.

Good quality PTFE Silicone Septa for sales
Good quality PTFE Silicone Septa for sales
Good Products ,Good Service,Good Sourcing Platform!

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Seal Expanded PTFE Gasket , Back Up Ring PTFE Piston Ring O Ring

China Seal Expanded PTFE Gasket , Back Up Ring PTFE Piston Ring O Ring supplier

Large Image :  Seal Expanded PTFE Gasket , Back Up Ring PTFE Piston Ring O Ring

Product Details:

Place of Origin: CHINA
Brand Name: ERM
Model Number: Expanded PTFE Gasket

Payment & Shipping Terms:

Minimum Order Quantity: 100 pcs
Packaging Details: Poly bag
Delivery Time: 15 days
Payment Terms: T/T
Supply Ability: 5000pcs/day
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Detailed Product Description
Color: White Feature: High Performance
Function: Seal Material: PTFE
Product Name: Expanded PTFE Gasket Style: O Ring


Seal Expanded PTFE Gasket , Back Up Ring PTFE Piston Ring O Ring





If you need to prevent extrusion in Rubber O-Ring sealing systems, a PTFE Back-Up ring is the right solution.

Rubber O-Rings are generally used in dynamic and static hydraulic and pneumatic applications but tend to wear when subject to increasing temperatures and pressures.

The current fluid system technology combines more and more high pressures with high temperatures.

A combination, which is a strong burden to Rubber O-Rings physical and mechanical properties.
This explains why a PTFE Back-Up Ring is so important in preventing the O-Ring extrusion.



  • materials
    Our back-up rings are manufactured in either virgin PTFE, Por filled PTFE, depending on the application.

    Why use back-up rings?
    Back-up rings are installed to prevent extrusion of the 'O' ring. Two back-up rings - one either side of the 'O' ring in its housing - are needed when the application is double acting.


Endless back up ring


The endless back up ring is used where problems can occur with the rotation of a screwed endcaps which on assembly could cause the spiral type of unwind .

Endless split back up ring

The endless split  back up ring is manufactured as the endles style but is split at 30 to facilitate ease of assembly in certian applications .





  • Pressure of the fluid medium exceeds 10MPa,
  • 'O' rings of low strength elastomer are used,
  • Adverse mechanical conditions prevail.



Advantage of our products:


1.   Professional manufacture.

2.   Implement strict quality test & control procedure.

3.   High quality & Best price.

4.   Good after-sale service.

5.   Fast delivery time.



Our Service:


We believe our products will satisfy you.

Our good quality, excellent service and competitive prices are your best selection.

Thanks for visiting our website!!!

If you have any interest, please feel free to contact us!

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Shanghai Oil Seal Co.,Ltd.

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