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INDUSTRY COMPONENT

Valve Stem / Piston

Precision valve stem/piston for aseptic filling valve assemblies ensuring sterile fluid transfer in beverage manufacturing.

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Component Specifications

Definition

A critical cylindrical component in aseptic filling valve assemblies that moves linearly to open/close fluid pathways, maintaining sterility by preventing microbial ingress during beverage filling operations. It interfaces with seals and actuators to control product flow with minimal contamination risk.

Working Principle

Operates through linear actuation (pneumatic/hydraulic) to displace within a sealed chamber, creating a barrier that opens/closes fluid ports. In closed position, it blocks product flow; when retracted, allows precise filling while maintaining aseptic conditions via sterile barrier systems.

Materials

AISI 316L stainless steel (UNS S31603) with electropolished finish (Ra ≤ 0.4 μm); alternative: ceramic-coated titanium for corrosive applications.

Technical Parameters

Diameter 8-25 mm
Stroke Length 15-50 mm
Surface Finish Ra ≤ 0.4 μm
Temperature Range 0-130°C
Operating Pressure 0-6 bar
CIP/SIP Compatibility Yes

Standards

ISO 2852, DIN 11866, FDA 21 CFR 177, EHEDG

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Valve Stem / Piston.

Parent Products

This component is used in the following industrial products

Aseptic Filling Valve Assembly

A critical assembly that precisely controls the flow of hot, sterile beverage into bottles while maintaining aseptic conditions during the filling process.

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Engineering Analysis

Risks & Mitigation

Microbial contamination due to surface imperfections
Corrosion from acidic beverages
Seal failure causing leakage
Actuation misalignment

FMEA Triads

Trigger: Surface roughness exceeding Ra 0.4 μm
Failure: Bacterial adhesion and biofilm formation
Mitigation: Implement electropolishing and regular surface inspection per EHEDG guidelines

Trigger: Material incompatibility with cleaning agents
Failure: Corrosion and pitting
Mitigation: Use 316L stainless steel with proper passivation and validate CIP chemical compatibility

Trigger: Wear from repeated cycling
Failure: Increased clearance causing leakage
Mitigation: Design with replaceable wear sleeves and monitor cycle counts

Industrial Ecosystem

Compatible With

Krones Aseptics, Sidel Matrix, KHS Innofill, Serac fillers

Interchangeable Parts

Alfa Laval, GEA, Tetra Pak, SPX Flow

Compliance & Inspection

Tolerance

±0.01 mm diameter, ±0.05 mm straightness

Test Method

Dimensional verification per ISO 2768-m, surface roughness testing per ISO 4287, pressure testing per ISO 15848

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.

Related Components

Holding Tube

A precision-engineered tube in pasteurization systems that maintains precise temperature for pathogen elimination while preserving beverage quality.

Temperature Sensors

Temperature sensors are precision components that measure thermal conditions in beverage pasteurization systems to ensure product safety and quality.

Oxygen Sensor

Precision electrochemical sensor for real-time oxygen monitoring in beverage deoxygenation systems

Pressure/Vacuum Transducer

A precision transducer that measures pressure or vacuum levels in automated beverage container testing systems to ensure seal integrity and safety compliance.

Frequently Asked Questions

What materials are suitable for aseptic valve stems?

AISI 316L stainless steel is standard for corrosion resistance and cleanability. Ceramic coatings or titanium may be used for highly corrosive products.

How does the stem maintain sterility during operation?

Through precision machining with Ra ≤ 0.4 μm finish, proper seal integration, and compatibility with Clean-in-Place/Sterilize-in-Place (CIP/SIP) processes.

What standards apply to these components?

ISO 2852 for aseptic connections, DIN 11866 for dairy fittings, FDA regulations for food contact, and EHEDG guidelines for hygienic design.

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.