Designed for CFOS applications in the semiconductor industry and fine chemicals

Ball Valves for Maximum Purity and Process Reliability

The Dockweiler ball valve series was specifically developed for applications with the highest requirements for purity, safety, and reliability. CFOS-compliant cleaning, cleanroom installation, and high leak tightness make these valves a reliable solution for modern gas supply systems. Whether used as individual components or integrated into prefabricated distribution systems, Dockweiler ball valves ensure maximum process reliability while enabling efficient installation.

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Content:

Purity starts with every detail

Designed for critical media and processes

Semiconductor industry
Fine chemicals
Bulk gases
Specialty Gases
Oxygen Applications (CFOS)
Analytical Systems

In the semiconductor industry and fine chemicals sector, even the smallest impurities or leaks can determine yield, equipment availability, and process stability. That is why Dockweiler ball valves have been specifically designed for ultra-high-purity applications.

All components are flushed with deionized water in accordance with ASTM G93 Level B for oxygen applications, ultrasonically cleaned, dried, then assembled and packaged under cleanroom conditions, and tested for a helium leak rate of up to 1 × 10⁻⁸ mbar·l/s.

The result is a ball valve that reliably meets the requirements for Clean For Oxygen Service (CFOS).

The modular valve concept

One solution, many connection options

Dockweiler ball valves feature a consistently modular design. This allows them to be optimally adapted to different plant configurations.
Available connection options:

Pipe socket connection for orbital welding applications
CFOS Compression Fitting Connection (CFC)
UHP Face Seal Connection (FSC), equivalent to VCR^®
Configurable purge ports
Custom valve assemblies and manifold solutions

This reduces installation times and efficiently meets customer-specific requirements.

^{*VCR® is a registered trademark of Swagelok Company, USA.}

Highest quality for demanding applications

Selected materials and defined surfaces

All areas in contact with the medium are specifically treated to ensure optimal weldability and high medium purity.
Highlights:

Mechanically polished surfaces down to Ra ≤ 0.5 µm on the ball, bore, and pipe connections
Pipe connections with surfaces up to Ra ≤ 0.8 µm
Controlled sulfur content between 0.005% and 0.017%
Tube ends suitable for orbital welding
Material quality tailored to high-purity gas applications

These features support reproducible weld quality as well as safe and stable processes.

System solutions for modern CFOS applications

From individual components to fully pre-assembled CFOS distribution systems

Your partner for high-purity gas supply systems

Dockweiler combines high-purity piping systems, connection technologies, ball valves, and customized system solutions into a comprehensive, end-to-end solution.

Benefits of Dockweiler Ball Valves

CFOS-compliant cleaning

Cleaning in accordance with ASTM G93 Level B and CGA G-4.1 for applications with the highest requirements for media purity.

High Tightness

Each ball valve undergoes a factory helium leak test down to 1 × 10⁻⁸ mbar·l/s.

Cleanroom Assembly and Packaging

Assembly and packaging under controlled cleanroom conditions for maximum process reliability

Complete documentation

Declarations of conformity, material certificates, and additional test reports ensure complete traceability.

PFAS-Free Option

Alternative sealing concepts are available as an option to address future regulatory requirements early on.

Seamless system integration

Optimized for Dockweiler piping systems, face-seal connections, cutting ring technology, and complete CFOS manifold systems.

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Everything from a single source

Dockweiler offers connections, gaskets and O-rings from a single source – from standard solutions to high-purity specialized compounds for the pharmaceutical industry, biotechnology, cosmetics and food industry, as well as for the semiconductor industry.

Special fittings for your needs

When standard products are not enough, we offer customized special fittings for your specific requirements. From design to delivery - we make sure that our solutions are perfectly tailored to your needs. Click here to find out more.

Selected Alloys

At Dockweiler, quality begins long before pipe production. With our Selected Alloys approach, we evaluate and qualify materials as early as the melt stage to lay the foundation for maximum purity, optimal weldability, and the highest process reliability.