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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.
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Advantages:
1. Prevents O-Ring extrusion. |
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Working Conditions |
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Working Pressure |
Temp range |
Media |
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≤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
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