PEEK fixed ring

PEEK fixed ring

Core Features

  • Dimensional Stability & Static Security: Engineered for stationary applications where a “zero-movement” interface is required, maintaining absolute tolerances under intense clamping forces.
  • High-Pressure Load Bearing: Acts as a superior structural support or backup ring, preventing the extrusion of softer elastomeric seals in high-pressure hydraulic and pneumatic systems.
  • Thermal Expansion Calibration: Features a low coefficient of thermal expansion compared to other engineering plastics, ensuring the ring does not warp or lose its seal in operating environments up to 250°C.
  • Absolute Chemical Immunity: Resistant to virtually all organic solvents, aggressive acids, and bases, making it the premier choice for stationary seals in corrosive chemical processing and “sour gas” ($H_2S$) environments.
  • Micro-Tolerance Flatness: Precision-machined to achieve absolute surface parallelism, critical for maintaining a bubble-tight interface in flange or face-seal assemblies.

At Kriloha Ltd., we understand that in high-pressure architectures, the most critical component is often the one that doesn’t move. Our PEEK Fixed Rings represent our engineered answer for “Structural-Seal-Integrity” and “Zero-Creep-Security.” As a premier manufacturer of high-performance polymer solutions, Kriloha has established a specialized fabrication ecosystem to ensure that every fixed ring provides a robust mechanical barrier for your most critical systems.

The engineering of our fixed ring program is founded on Material-Purity and Geometric-Precision. By utilizing state-of-the-art 5-axis CNC machining centers, we eliminate the internal stresses and “parting-line” weaknesses often found in standard molded parts. This results in a ring that exhibits uniform density and exceptional compressive strength. At Kriloha, we verify the dimensional stability of every bespoke ring under maximum thermal load, resulting in “Failure-Resistant” components that replace heavy, corrosive metal spacers and outlive traditional PTFE alternatives.

Manufacturing these advanced polymer components involves strict Flatness-Verification, Pressure-Calibration, and Surface-Roughness ($R_a$) Verification. We collaborate directly with your engineering teams to process bespoke configurations—including integrated O-ring grooves, proprietary mounting interfaces, and reinforced PEEK grades. By choosing Kriloha Ltd., you are investing in a “Future-Proof” manufacturing partnership that prioritizes your system’s reliability through superior material science.

Primary Use Cases

  • Chemical Reactor Flanges: Stationary sealing rings for pressure vessels handling highly reactive reagents and organic acids.
  • Semiconductor Vacuum Chambers: High-purity, low-outgassing fixed rings used as structural spacers or vacuum-tight seals in wafer processing equipment.
  • Oil & Gas Wellheads: Heavy-duty backup rings and fixed spacers for subsea and downhole equipment subjected to extreme hydrostatic pressure.
  • Aerospace Fuel Systems: Lightweight, thermally stable fixed seals for fuel regulators and environmental control systems (ECS).
  • Medical Sterilization Hardware: Autoclave-safe fixed rings for high-pressure steam chambers and diagnostic instrumentation.

Frequently Asked Questions

Why use a PEEK fixed ring instead of a Metal or PTFE ring?

Metal rings are heavy and prone to corrosion, while PTFE “cold flows” (deforms) under pressure. PEEK provides the chemical resistance of an inert polymer with the structural strength of a metal, ensuring the ring maintains its seal without deforming or corroding.

Can Kriloha manufacture fixed rings with custom O-ring grooves?

Absolutely. We specialize in precision CNC machining and can create exact groove geometries to house elastomeric energizers, combining the structural strength of PEEK with the flexible sealing of an O-ring.

Is PEEK safe for fixed seals in ultra-high vacuum (UHV) systems?

Yes. PEEK has exceptionally low outgassing rates and high thermal stability, making it the industry standard for semiconductor and space-grade fixed seals where purity and vacuum integrity are critical.

How does a fixed ring handle mechanical clamping force?

PEEK features a high compressive strength and high mechanical modulus. Our rings are designed to handle standard industrial torque and clamping forces without crushing or “creeping” over time.

Are custom layouts available for non-standard housing depths?

Yes. We utilize precision CNC technology to achieve sub-millimeter accuracy for any custom diameter, thickness, or specialized geometry required by your proprietary CAD designs.

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