English
JST's back up ring compensate for large temperature fluctuations. Using Back-up Rings allows O-Rings to be utilized in higher pressure applications, where larger extrusion gaps are required and where there are reciprocating or rotating movements.
Back-up Rings are protective and supporting elements with no sealing function.
The back up ring material could be PEEK, modified PTFE.
Brand:
JST SealsItem NO.:
DQQ/DQKPayment:
T/TProduct Origin:
ChinaShipping Port:
GuangzhouOrder(MOQ):
50Downhole PEEK back-up rings
JST makes custom and standard PEEK back-up rings.
Custom sizes up to 24” outer diameter.
Elastomer O-rings serve as effective seals for dynamic and static applications in hydraulic and pneumatic equipment systems. A drawback of elastomer O-rings is their tendency to extrude into the clearance of mating surfaces with increasing pressures and temperatures. Higher temperatures impose a severe burden on the physical and mechanical properties of elastomer O-rings, which further increases their tendency to extrude. The combination of high pressures and high temperatures is a common occurrence in fluid systems. This establishes the need for the back-up ring in preventing O-Ring extrusion.
JST makes various types of PEEK™ back-up ring designs.
PEEK back-up rings material
Virgin PEEK™
● Engineered thermoplastic.
● PEEK™ can be used up to 480°F.
● Excellent chemical resistance.
● Very low moisture absorption.
● Good wear and abrasion resistance.
Glass filled PEEK™
● PEEK™ with the addition of glass fibers.
● Glass fibers reduce the expansion rate and increase the flexural modulus.
 |
Advantages:
1. Prevents O-Ring extrusion. |
|
Working Conditions |
||
|
Working Pressure |
Temp range |
Media |
|
≤10000PSI |
≤350°F |
Compatible with virtually all media and gases |
Size:
47.60X41.78X2.29mm
47.60X43.56X1.42mm
52.77X47.23X2.03mm
57.19X48.6X3.45mm
59.23X55.27X2.29mm
If you are interested in our products and want to know more details,please leave a message here,we will reply you as soon as we can.
Categories
The ball valve seat is responsible for sealing the fluid inside and uniformly distributing the seating stress. A leak of ball valve in petrochemical application could be environmentally devastating.
JST FHR series is made of a helical wound spring and a polymer jacket, which is mainly used for rod.
Perfluoroelastomer (FFKM) O-rings have carbon fluorine bonds, making them one of the most thermally stable, oxidative stable, and chemically stable fluorinated polymers.
A seal assembly for use in a wellbore tool, it acts as a flow restrictor protecting a lower end of the seal assembly from high pressure and/or high volume flow.
FFKM O-rings provide the highest temperature (up to 620 ° F) and most common chemical resistance among all rubber O-ring and gasket materials.
It is an end face spring energized seal with both rigid and flexible elements, which gives consistent contact at the sealing interface.
P seal is constructed from an elastomer with back up rings for anti-extrusion. Energized by the injection of sealant, it is a static seal that is used to seal rough casing and tubing. Backup rings are available in Mesh Stainless Steel or Solid Carbon Steel.
JST's RGD (Rapid Gas Decompression) o ring can be applicated in high and low temperature environment with high pressure. It is widely used in detection and drilling equipment, completion equipment, underwater valves and pumps, compressor ect.
For inquiries about our products or pricelist, please leave to us and we will be in touch within 24 hours.
No. 1, Xinyu North Road, Ningxi Street, Zengcheng District, Guangzhou, China 511340
© Copyright: 2025 Guangzhou JST Seals Technology Co., Ltd. All Rights Reserved.
Scan to wechat
