Plug Body: Temperature Range -20°C to 400°C

Component Specifications

Definition

The plug body is a critical component in plug valves, serving as the rotating element that regulates fluid flow through the valve. It features a tapered or cylindrical design with a through-port that aligns with the valve body ports to allow flow or rotates to block it. Engineered for precise fit within the valve body, it ensures leak-tight sealing and smooth operation under various pressure and temperature conditions.

Working Principle

Operates by rotating 90 degrees within the valve body to open or close the flow path. The plug's port aligns with the inlet and outlet ports in the open position, allowing fluid passage. In the closed position, the solid section of the plug blocks the ports, stopping flow. Sealing is achieved through mechanical interference, lubricants, or elastomeric sleeves.

Materials

Carbon steel (ASTM A216 WCB), stainless steel (ASTM A351 CF8M), alloy steel, brass, or specialized alloys for corrosive environments. Surface treatments may include hardening, plating, or coating.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Port Size	DN15 to DN600
Taper Ratio	1:6 or 1:8
Surface Finish	Ra 0.8 μm max
Pressure Rating	PN16 to PN100
Temperature Range	-20°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 17292, API 599, DIN 3356

Parent Products

This component is used in the following industrial products

Valve Plug

The movable component within a control valve that regulates fluid flow by adjusting the orifice opening.

View Product Details

Engineering Analysis

Risks & Mitigation

Wear and tear from friction
Corrosion in harsh environments
Improper installation leading to leaks

FMEA Triads

Trigger: Abrasive particles in fluid
Failure: Surface scoring and increased leakage
Mitigation: Use hardened materials, install filters, and implement regular maintenance.

Trigger: Thermal expansion mismatch
Failure: Seizing or binding during operation
Mitigation: Select materials with compatible coefficients, design with clearances, and control operating temperatures.

Industrial Ecosystem

Compatible With

Plug valves, control valves, sampling valves

Typical Suppliers & Equivalents

Crane, Flowserve, Kitz, Velan

Compliance & Inspection

Tolerance

±0.05 mm on critical dimensions

Test Method

Hydrostatic testing per ISO 5208, helium leak testing for high-integrity 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.

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

Manufacturers of Plug Body

Manufacturer profiles associated with Plug Body.

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Frequently Asked Questions

What is the primary function of a plug body in a valve?

To regulate fluid flow by rotating to align or block ports in the valve body.

How does a plug body achieve sealing?

Through tapered design, lubricants, or elastomeric sleeves that create a tight fit against the valve body.

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.

Plug Body