Disc/Ball: Temperature Range -50°C to 400°C, Diameter 10-500 mm

Component Specifications

Definition

The Disc/Ball is a critical sealing component in check valves, designed to move freely within the valve body to allow unidirectional flow. When fluid flows in the forward direction, pressure lifts the disc/ball from its seat; when flow reverses or stops, gravity or backpressure forces it back against the seat, creating a tight seal to prevent backflow. This component ensures system integrity by maintaining pressure and preventing contamination in pipelines.

Working Principle

The Disc/Ball operates on a simple mechanical principle: it responds to fluid pressure differentials. Forward flow creates pressure that displaces the component from its seat, allowing passage. Reverse flow or absence of forward pressure causes the disc/ball to return to its seated position, blocking the flow path. In swing check valves, a hinged disc pivots; in ball check valves, a spherical ball moves linearly; both rely on fluid dynamics and gravity for operation.

Materials

Common materials include stainless steel (e.g., AISI 316 for corrosion resistance), brass (for low-pressure applications), carbon steel (for high-strength needs), and engineered polymers like PTFE or Nylon (for chemical compatibility). Material selection depends on fluid type, pressure, temperature, and environmental conditions.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Diameter	10-500 mm
Seal Type	Metal-to-metal or soft-seat (e.g., elastomer)
Pressure Rating	Up to 6000 psi
Temperature Range	-50°C to 400°C
Flow Coefficient (Cv)	Varies by size and design

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, DIN 3230, ASME B16.34

Parent Products

This component is used in the following industrial products

Check Valves

Check valves are one-way flow-control components used in fluid handling systems to permit flow in a single direction and to block reverse flow.

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Check Valves (Inlet & Outlet)

Check valves installed at the inlet and outlet of a pump head or fluid block ensure unidirectional fluid flow, preventing reverse flow that could damage the pump or disrupt system operation.

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Engineering Analysis

Risks & Mitigation

Seal failure leading to backflow
Corrosion or wear from abrasive fluids
Sticking due to debris accumulation
Water hammer from rapid closure

FMEA Triads

Trigger: Material degradation from chemical exposure
Failure: Loss of sealing, causing backflow and system contamination
Mitigation: Use corrosion-resistant materials like stainless steel or coatings; implement regular inspection and replacement schedules.

Trigger: Debris buildup on seating surface
Failure: Disc/Ball fails to close fully, allowing leakage
Mitigation: Install filters upstream; design valves with self-cleaning features; perform routine maintenance.

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Seating surface flatness within 0.001 inches per inch; dimensional tolerances per ISO 2768-m

Test Method

Pressure testing per ISO 5208 for leakage rates; material certification per ASTM standards; functional testing under simulated flow conditions.

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

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

Manufacturers of Disc/Ball

Manufacturer profiles associated with Disc/Ball.

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Frequently Asked Questions

What is the difference between a disc and a ball in check valves?

A disc is typically a flat or slightly curved plate used in swing check valves, pivoting on a hinge; a ball is spherical and used in ball check valves, moving linearly. Discs suit larger pipelines, while balls offer quicker response in smaller systems.

How do I select the right material for a Disc/Ball?

Consider fluid compatibility (e.g., stainless steel for corrosive fluids), pressure and temperature ratings, and industry standards. Consult valve specifications and conduct material testing if needed.

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/Ball