INDUSTRY COMPONENT

Gate / Blade / Disc

Gate/Blade/Disc is the primary sealing element in isolation valves and dampers that controls fluid or gas flow by rotating or sliding to block or allow passage.

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Component Specifications

Definition
The Gate/Blade/Disc is a critical component in isolation valves and dampers, functioning as the movable element that creates a seal against the valve seat or damper frame. In valves, it typically slides perpendicular to the flow direction (gate valve) or rotates (butterfly valve disc) to regulate flow. In dampers, blades pivot to modulate airflow in HVAC and industrial systems. This component must maintain precise dimensional tolerances and surface finishes to ensure leak-tight closure and reliable operation under various pressure, temperature, and media conditions.
Working Principle
The Gate/Blade/Disc operates by mechanical actuation (manual, pneumatic, electric, or hydraulic) to move between open and closed positions. In the closed position, it forms a seal against the valve body or damper frame, preventing fluid or gas flow. The sealing effectiveness depends on the contact pressure, surface geometry, and material compatibility with the media. For throttling applications, partial positioning allows controlled flow regulation.
Materials
Common materials include: Stainless Steel (304, 316 for corrosion resistance), Carbon Steel (for high strength), Ductile Iron, Bronze, Aluminum Alloys, and specialized coatings like PTFE or rubber lining for enhanced sealing. Material selection depends on media compatibility, pressure rating (PN10 to PN100), temperature range (-50°C to 400°C), and corrosion requirements.
Technical Parameters
  • Thickness 3-50 mm
  • Leakage Class ANSI/FCI 70-2 Class IV to VI
  • Diameter Range 50-2000 mm
  • Surface Finish Ra 0.8-3.2 μm
  • Pressure Rating Up to 100 bar
  • Temperature Range -50°C to 400°C
Standards
ISO 5211, ISO 5752, DIN 3352, API 609, ANSI/FCI 70-2

Industry Taxonomies & Aliases

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

isolation valve disc damper blade gate valve component flow control parts industrial valve components sealing elements butterfly valve disc HVAC damper blades Gate / Blade / Disc Gate / Blade / Disc in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Isolation Valve / Damper

A device used to completely shut off or regulate gas flow in a gas offtake system.

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Engineering Analysis

Risks & Mitigation
  • Seal failure leading to leakage
  • Corrosion or erosion damage
  • Mechanical binding or jamming
  • Incorrect installation causing misalignment
FMEA Triads
Trigger: Material degradation due to chemical attack
Failure: Loss of sealing capability and leakage
Mitigation: Use corrosion-resistant materials like 316 stainless steel or apply protective coatings; implement regular inspection schedules
Trigger: Mechanical wear from abrasive media
Failure: Increased clearance and reduced sealing effectiveness
Mitigation: Select hardened materials or wear-resistant coatings; install filtration systems upstream
Trigger: Improper installation alignment
Failure: Binding during operation and premature failure
Mitigation: Follow manufacturer installation guidelines; use alignment tools during assembly; conduct operational testing

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Dimensional tolerances per ISO 2768-m, flatness within 0.1 mm per 100 mm, surface roughness Ra ≤ 1.6 μm for sealing surfaces
Test Method
Pressure testing per ISO 5208, leakage testing per ANSI/FCI 70-2, material certification per EN 10204 3.1

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 gate, blade, and disc in flow control applications?

Gate typically refers to sliding rectangular plates in gate valves, blade refers to pivoting elements in dampers for airflow control, and disc refers to rotating circular plates in butterfly valves. All serve as the primary sealing/blocking element but with different motion geometries.

How do I select the right material for a Gate/Blade/Disc component?

Consider the media (corrosive, abrasive, sanitary), temperature, pressure, and required sealing performance. Stainless steel is common for general purposes, while specialized coatings or alloys may be needed for aggressive chemicals or high temperatures.

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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