Sealing Disc/Gate: Temperature Range -50°C to 400°C

Component Specifications

Definition

The sealing disc or gate is a precision-engineered component used in sealing valves (such as upper and lower seal valves) to isolate fluid flow paths. It functions as a movable barrier that mates with a valve seat to prevent leakage when in the closed position. This component is essential for maintaining system pressure, preventing contamination, and ensuring operational safety in industrial fluid handling systems.

Working Principle

The sealing disc/gate operates by moving perpendicular to the fluid flow direction. When actuated, it slides or rotates into position against a precisely machined valve seat, creating a metal-to-metal or elastomer-enhanced seal. The sealing action relies on applied force (from manual, pneumatic, hydraulic, or electric actuators) to compress the disc against the seat, eliminating gaps that could allow fluid passage. In automated systems, position sensors often verify complete closure.

Materials

Common materials include stainless steel (304, 316), carbon steel, brass, or specialized alloys for corrosion resistance. Sealing surfaces may incorporate elastomers (Viton, EPDM, silicone) or PTFE coatings for enhanced sealing. Hard-facing materials like Stellite are used for abrasive service.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Diameter	25-300 mm
Thickness	5-40 mm
Surface Finish	Ra 0.8 μm or better on sealing faces
Pressure Rating	Up to 6000 psi
Temperature Range	-50°C to 400°C
Flatness Tolerance	0.05 mm maximum deviation

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 5208, ISO 17292, DIN 3356, API 598

Parent Products

This component is used in the following industrial products

Sealing Valves

Valves designed to create and maintain a seal within the top charging system of industrial equipment, typically controlling the isolation of upper and lower chambers.

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Engineering Analysis

Risks & Mitigation

Seal failure leading to leaks
Corrosion damage
Mechanical wear from particulate matter
Thermal expansion mismatch
Improper installation causing misalignment

FMEA Triads

Trigger: Abrasive particles in fluid
Failure: Surface scoring and increased leakage
Mitigation: Install upstream filtration, use hardened materials, implement regular maintenance

Trigger: Excessive actuation force
Failure: Disc deformation or seat damage
Mitigation: Calibrate actuators to specified torque/force limits, install pressure relief

Trigger: Thermal cycling
Failure: Material fatigue and crack formation
Mitigation: Select materials with matching thermal expansion coefficients, design for thermal stress relief

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Dimensional tolerances per ISO 2768-m, sealing surface flatness within 0.1% of diameter

Test Method

Hydrostatic/pneumatic testing per ISO 5208, helium leak testing for critical applications, surface inspection per ASME B46.1

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

Check the legal entity, factory address, ownership, certifications, and direct contacts.

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Manufacturers of Sealing Disc/Gate

Manufacturer profiles associated with Sealing Disc/Gate.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the difference between a sealing disc and a gate in valve terminology?

A sealing disc typically refers to a circular component that rotates or lifts to seal, while a gate usually describes a rectangular or wedge-shaped component that slides perpendicular to flow. Both serve similar sealing functions but differ in geometry and movement patterns.

How often should sealing discs be inspected in continuous operation?

Inspect every 6-12 months depending on service conditions. High-cycle or abrasive applications may require quarterly inspections. Monitor for wear, scoring, or deformation that could compromise sealing integrity.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Sealing Disc/Gate