Sealing Gasket / Ring: Temperature Range -50°C to +300°C

Q: What is the difference between a gasket and a sealing ring?

Gaskets are typically flat sheets cut to shape for sealing between flat surfaces (like flanges), while sealing rings (like O-rings) are toroidal and fit into grooves for radial sealing in dynamic or static applications.

Q: How often should sealing gaskets be replaced?

Replacement intervals depend on operating conditions: typically 1-5 years for static seals, more frequently for dynamic seals. Signs for replacement include visible degradation, leakage, compression set exceeding 25%, or during scheduled maintenance per manufacturer guidelines.

Q: What causes sealing gasket failure?

Common causes include improper installation (over/under-torquing), material incompatibility with media, excessive temperature/pressure, chemical degradation, extrusion under pressure, and aging/hardening over time.

Component Specifications

Definition

A sealing gasket or ring is a precision-engineered component used in the Sealing Head Assembly of industrial machinery to create a reliable barrier against fluid or gas leakage. It functions by filling microscopic irregularities between two mating surfaces under compression, ensuring hermetic sealing in high-pressure, high-temperature, or corrosive environments. These components are critical for maintaining system integrity, preventing contamination, and ensuring operational safety in various industrial applications.

Working Principle

The sealing gasket/ring operates on the principle of compression sealing. When installed between two mating surfaces (typically flanges or joints) and subjected to compressive force via bolts or clamps, the gasket material deforms elastically or plastically to fill surface imperfections. This creates a continuous barrier that prevents the passage of fluids or gases. The effectiveness depends on material properties, surface finish, bolt torque, and operating conditions (pressure, temperature, chemical exposure).

Materials

Common materials include: Nitrile Rubber (NBR) for oil resistance, Fluorocarbon (Viton/FKM) for high-temperature chemical resistance, Ethylene Propylene Diene Monomer (EPDM) for steam/water applications, Polytetrafluoroethylene (PTFE) for extreme chemical inertness, Metal (stainless steel, copper) for high-pressure/temperature applications, and Composite materials (rubber-fabric, graphite-metal) for specialized conditions. Material selection depends on temperature range (-50°C to +300°C typical), pressure (up to 10, 000 psi), and chemical compatibility.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Hardness	50-90 Shore A
Thickness	1-10 mm
Inner Diameter	10-500 mm
Outer Diameter	20-600 mm
Compression Set	<25% (ASTM D395)
Pressure Rating	Up to 10,000 psi
Tensile Strength	10-25 MPa
Temperature Range	-50°C to +300°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 3601, ISO 6194, DIN 3770, DIN 7716, ASTM F104

Parent Products

This component is used in the following industrial products

Sealing Head Assembly

The critical component of an automated beverage container foil sealing machine that applies heat and pressure to create an airtight seal between the container rim and foil lid.

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Tip Assembly

The terminal component of an injection lance responsible for precise material delivery and flow control.

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Engineering Analysis

Risks & Mitigation

Leakage leading to fluid loss or contamination
System pressure drop
Environmental contamination
Safety hazards from toxic/flammable leaks
Equipment damage from loss of lubrication/cooling
Reduced operational efficiency

FMEA Triads

Trigger: Incorrect material selection for operating environment
Failure: Chemical degradation, swelling, or hardening leading to leaks
Mitigation: Conduct compatibility testing; use chemical resistance charts; select materials rated for specific media/temperature

Trigger: Improper installation (uneven bolt torque, surface contamination)
Failure: Uneven compression causing localized leaks
Mitigation: Follow torque sequence specifications; clean mating surfaces; use alignment tools; train personnel on installation procedures

Trigger: Exceeding pressure/temperature ratings
Failure: Extrusion, blow-out, or thermal degradation
Mitigation: Design with safety margins; install pressure/temperature sensors; use backup rings for high pressure; select high-temp materials

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Dimensional tolerances per ISO 3601-1: ±0.10mm on diameters, ±0.15mm on cross-section; Surface finish: Ra 0.8-3.2 μm on mating surfaces

Test Method

Leak testing per ISO 9978 (pressure decay/ helium mass spectrometry); Compression set per ASTM D395; Temperature resistance per ASTM D573; Fluid immersion testing per ASTM D471

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

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CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Sealing Gasket / Ring

Manufacturer profiles associated with Sealing Gasket / Ring.

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Frequently Asked Questions

What is the difference between a gasket and a sealing ring?