Main Valve Body for Precision Filling Heads | Specifications & Standards

Product Specifications

Technical details and manufacturing context for Main Valve Body

Definition

The Main Valve Body is the central structural component of a Precision Filling Head, providing a sealed housing that contains the valve seat, stem, and actuation mechanisms. It directs fluid flow, maintains pressure integrity, and ensures precise metering during the filling process in automated packaging lines. Constructed from Stainless Steel 316L, the body is designed for cleanability and corrosion resistance, with surface roughness values ranging from Ra 0.8 to 1.6 μm to minimize particle entrapment. The nominal diameter spans DN15 to DN50 (ISO 6708), influencing flow capacity and connection size. Operating pressure is specified between 1.0 and 1.6 MPa; operating temperature ranges from -20°C to 120°C (ISO 10497), above which seal integrity degrades. The flow coefficient (Cv) varies from 2.5 to 20 (ISO 10791), with higher values for larger sizes. Seat leakage rate is ≤0.01 ml/min, achieving Class VI shutoff critical for precision filling. Weight ranges from 0.8 to 3.5 kg, affecting handling and installation. These parameters serve as reference ranges for directory listing; actual values must be confirmed with the legal manufacturer or supplier for specific models and applications. The body's internal geometry and sealing surfaces are critical for controlling flow rate, preventing leaks, and ensuring repeatable fill volumes. Material grade per ASTM A276 is 316L, ensuring corrosion resistance and cleanability. This component is integral to filling systems in industries such as food, beverage, pharmaceutical, and chemical processing, where accuracy and hygiene are paramount. Verification of standards compliance and performance characteristics is essential before procurement.

Working Principle

The Main Valve Body acts as a pressure vessel and flow conduit. When the valve is actuated, fluid enters through an inlet port, is directed past the valve seat by the stem's movement, and exits through an outlet port to the filling nozzle. Its internal geometry and sealing surfaces control flow rate, prevent leaks, and ensure repeatable fill volumes. The body maintains pressure integrity within specified operating limits, and its surface finish reduces particle entrapment, supporting cleanability.

Common Materials

Stainless Steel 316L

Technical Parameters

Parameter	Typical range	Notes & selection driver
Nominal Diameter	DN15–DN50 mm	Determines flow capacity and connection size.ISO 6708
Operating Pressure	1.0–1.6 MPa	Below 1.0 MPa the seat load is insufficient.
Operating Temperature	-20–120 °C	Seal integrity degrades above 120°C.ISO 10497
Flow Coefficient	2.5–20 Cv	Higher Cv for larger sizes.ISO 10791
Seat Leakage Rate	≤0.01 ml/min	Class VI shutoff; critical for precision filling.ISO 5208
Surface Roughness	Ra 0.8–1.6 μm	Smoother finish reduces particle entrapment.ISO 1302
Material Grade	316L ASTM	Corrosion resistance and cleanability.ASTM A276
Weight	0.8–3.5 kg	Affects handling and installation.

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Valve Seat Part
Provides the sealing surface against which the valve stem closes to stop fluid flow.

Material: Stainless Steel or Ceramic
Stem Guide/Bushing Part
Aligns and supports the valve stem, ensuring straight-line actuation and minimizing wear.

Material: Bronze or PTFE-Impregnated Stainless Steel
Port Threads Part
Machined internal or external threads for connecting inlet/outlet piping or fittings.

Material: Stainless Steel

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Precision Filling Head

View system integration details

Manufacturers of Main Valve Body

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Frequently Asked Questions

What materials are available for the Main Valve Body?

According to the directory listing, the material on file is Stainless Steel 316L, per ASTM A276. This grade provides corrosion resistance and cleanability. For specific models, confirm material availability with the manufacturer.

What are the operating pressure and temperature ranges?

The listed operating pressure range is 1.0 to 1.6 MPa, and the temperature range is -20°C to 120°C (ISO 10497). These are reference values; always verify the actual limits for your application with the supplier.

How does the Main Valve Body ensure precise filling?

The body's internal geometry and sealing surfaces control flow rate and prevent leaks. The seat leakage rate is ≤0.01 ml/min (ISO 5208), achieving Class VI shutoff, which is critical for repeatable fill volumes in precision filling.

What standards apply to the Main Valve Body?

Relevant standards include ISO 6708 for nominal diameter, ISO 5208 for pressure and leakage, ISO 10497 for temperature, ISO 10791 for flow coefficient, ISO 1302 for surface roughness, and ASTM A276 for material. These are verification references; compliance must be confirmed with the manufacturer.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	0 to 100 bar (g)
flow rate:	Up to 500 L/min
temperature:	-20°C to 150°C
slurry concentration:	Max 40% solids by weight

Main Valve Body

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