Gate / Blade / Disc: Diameter Range 50-2000 mm

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

Parameter	Typical range	Notes & selection driver
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

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 5211, ISO 5752, DIN 3352, API 609, ANSI/FCI 70-2

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.

View Product Details

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

Typical Suppliers & Equivalents

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

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.

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

Manufacturers of Gate / Blade / Disc

Manufacturer profiles associated with Gate / Blade / Disc.

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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 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.

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.

Gate / Blade / Disc