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Plug Body Component – Machinery and Equipment Manufacturing

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

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

Standards

ISO 17292, API 599, DIN 3356

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Plug Body.

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

Interchangeable Parts

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

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation

4/5

Manufacturing capability

4/5

Inspection readiness

5/5

Supplier transparency

3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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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.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

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