Valve Stem / Piston: Temperature Range 0-130°C

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

Parameter	Typical range	Notes & selection driver
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

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 2852, DIN 11866, FDA 21 CFR 177, EHEDG

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

Typical Suppliers & Equivalents

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

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

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Manufacturers of Valve Stem / Piston

Manufacturer profiles associated with Valve Stem / Piston.

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Related Components

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A mechanical or pneumatic device that redirects underfilled or overfilled beverage containers from the production line to a rejection area in automated filling verification systems.

Port Flanges

Precision-machined flanges for connecting beverage metering pump heads to piping systems with leak-proof seals.

Valve Stem and Seat

Precision sealing component for aseptic filling valves that controls sterile product flow in beverage manufacturing.

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.

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.

Valve Stem / Piston