Valve Disc/Ball: Temperature Range -50°C to +450°C

Component Specifications

Definition

The valve disc or ball is the primary sealing and flow-regulating component within inlet and outlet valves. It functions as a movable element that interfaces with the valve seat to create a tight seal when closed and provides controlled flow passage when open. In ball valves, it's a spherical element with a through-hole; in disc valves, it's a flat or tapered plate that rotates or lifts perpendicular to the flow direction. This component directly determines valve performance metrics including shut-off capability, flow coefficient (Cv), pressure drop, and service life.

Working Principle

The disc/ball operates by mechanical actuation (manual, pneumatic, or electric) to rotate or lift, changing its position relative to the valve seat. In the closed position, it creates a metal-to-metal or soft-seated seal against the seat, preventing fluid passage. When opened, it aligns its flow passage with the valve body ports, allowing controlled fluid movement. The sealing mechanism relies on precise machining, surface finish, and material compatibility to maintain integrity under varying pressures and temperatures.

Materials

Stainless steel (316/304), carbon steel, brass, alloy steels, or engineered polymers. Sealing surfaces may include hardened coatings (stellite, tungsten carbide) or elastomeric inserts (PTFE, EPDM, Viton) for enhanced sealing.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Diameter	10-500 mm
Leakage Class	ANSI/FCI 70-2 Class IV-VI
Surface Finish	Ra 0.4-1.6 μm
Pressure Rating	PN10 to PN420 (150-2500 psi)
Temperature Range	-50°C to +450°C
Flow Characteristic	Equal percentage/Quick opening

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 17292, API 608, ASME B16.34, DIN 3352

Parent Products

This component is used in the following industrial products

Inlet/Outlet Valves

Inlet/Outlet valves are critical components of dosing pumps that regulate the flow of fluids into and out of the pump chamber.

View Product Details

Valves (Suction & Discharge)

Flow control components in mud pumps that regulate drilling fluid intake and output.

View Product Details

Engineering Analysis

Risks & Mitigation

Seal degradation under thermal cycling
Cavitation erosion in high-velocity flows
Gallling in metal-to-metal seals
Corrosion in chemical service
Mechanical failure from over-torque

FMEA Triads

Trigger: Improper material selection for fluid service
Failure: Corrosion or chemical attack leading to seal leakage
Mitigation: Implement material compatibility charts and specify per ASTM/GOST standards; use corrosion-resistant alloys or coatings.

Trigger: Excessive actuation torque
Failure: Stem/disc connection failure or seat damage
Mitigation: Install torque limiters on actuators; follow manufacturer's torque specifications during assembly.

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Dimensional tolerances per ISO 2768-m; sealing surface flatness within 0.01 mm; surface roughness Ra ≤ 0.8 μm for metal seats

Test Method

Hydrostatic/pneumatic seat leakage test per API 598; material certification per EN 10204 3.1; NDE per ASME Section V

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 Valve Disc/Ball

Manufacturer profiles associated with Valve Disc/Ball.

Sourcing Valve Disc/Ball from China?

Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.

Request manufacturers We manufacture this

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Related Components

Mounting Interface

Precision mounting interface connecting punch tips to pharmaceutical tablet press machines for accurate tablet production.

Chrome Plating

Hard chrome plating is an electroplating process that deposits a layer of chromium onto metal surfaces to enhance wear resistance, corrosion protection, and reduce friction for hydraulic cylinder piston rods.

Upper Tool (Punch)

Upper Tool (Punch) is the active forming component in metal plate bending machines that applies precise downward force to create bends in sheet metal.

Main Frame

The main frame is the primary structural component of a hydraulic press, providing rigidity and stability to withstand high compressive forces during metal forming operations.

Frequently Asked Questions

What is the difference between a valve disc and a valve ball?

A valve disc is typically a flat or tapered plate that rotates or lifts perpendicular to flow (common in butterfly or globe valves), while a valve ball is spherical with a through-hole that rotates 90° to align with flow (exclusive to ball valves). Discs offer better throttling control; balls provide faster operation and higher flow capacity.

How do I select the right material for a valve disc/ball?

Material selection depends on fluid compatibility, pressure-temperature conditions, and wear resistance. Use stainless steel for corrosive fluids, carbon steel for high-pressure steam, and coated/elastomer-seated versions for bubble-tight sealing. Always verify against industry standards like NACE MR0175 for sour service.

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.

Valve Disc/Ball