Disc: Diameter 50-500 mm, Thickness 5-50 mm, Max RPM 300-3000

Component Specifications

Definition

A precision-engineered rotating disc that forms part of a disc/seat assembly, typically functioning as a sealing surface, grinding element, or material transfer component in industrial machinery. It interfaces with a stationary seat to create controlled contact for operations like fluid control, particle reduction, or product movement.

Working Principle

Operates by rotating against a stationary seat to create friction, pressure, or sealing contact. The disc's motion (often driven by a shaft) enables functions such as regulating flow in valves, grinding materials in mills, or separating components in centrifuges through centrifugal force and surface interaction.

Materials

Typically made from hardened steel (e.g., AISI 4140), stainless steel (e.g., 316L), cast iron, ceramics (e.g., alumina), or engineered polymers (e.g., PTFE). Material selection depends on application requirements like wear resistance, corrosion resistance, temperature tolerance, and friction properties.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Max RPM	300-3000
Diameter	50-500 mm
Hardness	45-60 HRC for metals
Thickness	5-50 mm
Surface Finish	Ra 0.4-1.6 μm
Flatness Tolerance	≤0.05 mm

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 286-2, DIN 7184

Parent Products

This component is used in the following industrial products

Disc/Seat Assembly

The critical sealing interface within a pressure relief valve that opens to release excess pressure and closes to maintain system integrity.

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Engineering Analysis

Risks & Mitigation

Wear and tear from friction
Misalignment causing uneven contact
Material fatigue under cyclic loading
Corrosion in harsh environments

FMEA Triads

Trigger: Improper material selection for operating conditions
Failure: Premature wear or corrosion leading to leakage or reduced efficiency
Mitigation: Conduct material compatibility analysis and use protective coatings or alternative materials

Trigger: Inadequate lubrication or cooling
Failure: Overheating and thermal deformation, causing sealing failure or binding
Mitigation: Implement regular maintenance schedules and monitor temperature with sensors

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Dimensional tolerances per ISO 286-2, surface finish per ISO 1302

Test Method

Dimensional inspection with CMM, hardness testing per ASTM E18, leak testing for sealing applications

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.

Compare the published product scope and source details, then include your specifications and quantity in an enquiry.

Manufacturers of Disc

Manufacturer profiles associated with 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 primary function of a disc in a disc/seat assembly?

The disc primarily creates controlled contact with the seat to perform functions like sealing (in valves), grinding (in mills), or material handling (in separators), depending on the machine type.

How do I select the right material for a disc?

Consider operating conditions: use hardened steel for high wear, stainless steel for corrosion resistance, ceramics for high temperatures, and polymers for chemical compatibility. Always match material to the seat for optimal performance.

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.

Disc