INDUSTRY COMPONENT

Sealing Disc/Gate

A sealing disc or gate is a critical component in sealing valves that creates a leak-proof barrier between fluid passages.

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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
  • 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
Standards
ISO 5208, ISO 17292, DIN 3356, API 598

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Sealing Disc/Gate.

sealing disc valve gate sealing component industrial valves leak prevention valve parts fluid control Sealing Disc/Gate Sealing Disc/Gate in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Sealing Valves (e.g., Upper & Lower Seal 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

Interchangeable Parts

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

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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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.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

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.

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