Body Cavity: Bore Size DN 15-600 (1/2"-24")

Component Specifications

Definition

The body cavity is the precisely engineered internal volume of a valve body that forms the primary flow path for fluids or gases. It houses critical functional elements like the seat, disc, or ball, and its geometry determines flow characteristics, pressure drop, and turbulence. Machined to exacting tolerances, it ensures proper sealing and alignment of moving parts while withstanding operational stresses from pressure, temperature, and fluid properties.

Working Principle

Operates by creating a controlled passageway where fluid enters through an inlet port, is directed by the cavity geometry, and exits through an outlet port. Flow regulation occurs when an internal closure element (disc, ball, or plug) moves within the cavity to obstruct, partially restrict, or fully open the flow path, altering the cross-sectional area available for fluid passage.

Materials

ASTM A216 WCB (carbon steel), ASTM A351 CF8M (stainless steel 316), ASTM A995 4A (duplex stainless steel), ASTM B61 (bronze), ASTM A494 M35-1 (monel). Surface finishes: Ra 0.8-3.2 μm for sealing surfaces, with hardness requirements of HRC 22-30 for carbon steel and HB 150-200 for stainless steel.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Bore Size	DN 15-600 (1/2"-24")
Cavity Volume	0.1-500 L depending on valve size
Leakage Class	ANSI/FCI 70-2 Class IV-VI
Pressure Rating	ANSI Class 150-2500 (PN 10-420)
Surface Roughness	Ra ≤ 1.6 μm for sealing surfaces
Temperature Range	-196°C to 815°C depending on material
Flow Coefficient (Cv)	5-10,000

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, API 598, ASME B16.34, DIN EN 12266-1

Parent Products

This component is used in the following industrial products

Valve Body

The main structural housing of a pressure relief valve that contains and directs fluid flow.

View Product Details

Regulating Valve Body

The main structural housing of a regulating valve that contains and supports internal flow control components.

View Product Details

Engineering Analysis

Risks & Mitigation

Cavitation damage from rapid pressure changes
Erosion-corrosion in high-velocity applications
Thermal stress cracking during temperature cycling
Galvanic corrosion in mixed-material assemblies
Flow-induced vibration leading to fatigue failure

FMEA Triads

Trigger: Improper material selection for fluid service
Failure: Accelerated corrosion leading to wall thinning and leakage
Mitigation: Implement material compatibility matrices and corrosion allowance calculations during design phase

Trigger: Inadequate surface finish on sealing areas
Failure: Seal leakage exceeding allowable rates
Mitigation: Specify Ra ≤ 1.6 μm finish with 100% inspection using profilometers

Trigger: Geometric deviations from design tolerances
Failure: Improper disc/ball alignment causing binding and operational failure
Mitigation: Implement statistical process control with Cpk ≥ 1.33 for critical dimensions

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.05 mm for bore diameter, ±0.1° for angular alignment, flatness within 0.025 mm per 100 mm

Test Method

Hydrostatic testing per API 598 (1.5x rated pressure), helium leak testing for severe service, dimensional verification using CMM

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 Body Cavity

Manufacturer profiles associated with Body Cavity.

Sourcing Body Cavity 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 factors determine body cavity geometry in valve design?

Cavity geometry is determined by flow requirements (Cv value), pressure drop limitations, fluid characteristics (viscosity, corrosiveness), actuation method, and sealing mechanism. Computational Fluid Dynamics (CFD) analysis optimizes shape to minimize turbulence and erosion.

How does cavity surface finish affect valve performance?

Surface finish directly impacts sealing effectiveness and flow efficiency. Smoother surfaces (Ra ≤ 1.6 μm) reduce friction, prevent particle accumulation, and ensure reliable sealing contact. Poor finishes cause leakage, increased wear, and higher pressure drops.

What are common failure modes in valve body cavities?

Erosion from high-velocity fluids, corrosion from aggressive media, cavitation damage from pressure fluctuations, thermal stress cracking, and mechanical deformation from overpressure or improper installation.

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.

Body Cavity