PEEK support ring

PEEK support ring

Core Features

  • Anti-Extrusion Security: Specifically engineered to sit behind softer elastomeric seals (like O-rings), providing a rigid structural barrier that prevents the primary seal from “extruding” into clearance gaps under high pressure.
  • Extreme Pressure Load Bearing: Maintains its structural modulus and dimensional integrity in systems exceeding 10,000 PSI, where standard backing rings would fail or deform.
  • Thermal Expansion Matching: Offers a low and predictable coefficient of thermal expansion, ensuring a consistent fit in continuous operating temperatures up to 250°C.
  • Zero “Cold Flow” Characteristics: Unlike PTFE (Teflon) support rings that creep over time, PEEK maintains its shape and mechanical tension, extending the maintenance intervals of the entire sealing assembly.
  • Total Chemical Neutrality: Resistant to virtually all aggressive industrial solvents, etching acids, and hydrocarbons, making it indispensable for “sour gas” (H2S) and subsea environments.

At Kriloha Ltd., we understand that in high-pressure architectures, the primary seal is only as strong as the support behind it. Our PEEK Support Rings (also known as Backup Rings) represent our engineered answer for “Extrusion-Resistance-Security” and “System-Longevity-Integrity.” As a premier manufacturer of customized polymer solutions, Kriloha has developed a specialized fabrication protocol to ensure that every support ring provides a robust mechanical foundation for your sealing assemblies.

The engineering of our support ring program is founded on Precision-Geometry and Material-Hardness. By utilizing state-of-the-art 5-axis CNC machining, we eliminate the structural inconsistencies and parting lines often found in molded alternatives. This results in a ring with perfectly square or contoured faces that interface flawlessly with the primary seal. At Kriloha, we verify the compressive strength of every bespoke ring, resulting in “Failure-Resistant” components that allow your system to operate at higher pressures without risk of seal bypass.

Manufacturing these advanced polymer components involves strict Dimensional, Thermal, and Purity Verification. We collaborate directly with your engineering teams to process bespoke configurations—including split (open), solid (closed), or spiral-cut designs. By choosing Kriloha Ltd., you are investing in a “Future-Proof” manufacturing partnership that prioritizes your system’s reliability through superior material science and micro-tolerance engineering.

Primary Use Cases

  • High-Pressure Hydraulics: Critical support components for heavy-duty cylinders in construction and mining equipment where pressure spikes are common.
  • Oil & Gas Downhole Tools: Backup rings for packers and logging instruments subjected to High-Pressure High-Temperature (HPHT) conditions.
  • Aerospace Actuators: Lightweight, high-strength support for flight control systems and landing gear hydraulics.
  • Semiconductor Fluid Handling: High-purity structural rings for gas and chemical delivery systems where metallic contamination is prohibited.
  • Subsea Connectors: Ruggedized support rings for underwater sensors and electrical connectors exposed to high hydrostatic loads.

Frequently Asked Questions

Why use a PEEK support ring instead of a PTFE (Teflon) backup ring?

PTFE is soft and will eventually extrude along with the primary seal under high pressure. PEEK is a structural thermoplastic with the strength of many metals; it stays rigid and bridges the clearance gap, protecting the softer seal from damage.

Can Kriloha manufacture “Split” support rings for easier installation?

Absolutely. We can machine “Scarf-cut” or “Step-cut” open rings that allow for rapid installation over a shaft without dismantling the entire assembly, while still providing maximum extrusion resistance.

Is PEEK safe for support rings in high-vacuum systems?

Yes. PEEK has exceptionally low outgassing properties and does not shed particulates, making it the industry standard for backup rings in semiconductor and space-grade vacuum chambers.

How do I determine the correct thickness for a PEEK support ring?

The thickness is generally determined by the extrusion gap and the maximum operating pressure. Our technical team at Kriloha Ltd. can help review your CAD designs to suggest the optimal dimensions for your specific load requirements.

Are custom sizes available for proprietary housing designs?

Yes. We specialize in precision CNC technology to achieve sub-millimeter accuracy for any custom internal diameter, wall thickness, or specialized geometry required by your proprietary projects.

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