WEKA introduces bellows valve configurations with reduced seat bore geometry, engineered for applications requiring exceptional mechanical robustness combined with the controllability of low mass flows. The optimized design significantly increases structural strength while maintaining identical flow characteristics.

The engineering solution

Traditional small-diameter cryogenic valves have thin walls due to compact design. Pipeline forces from thermal cycling, expansion, or installation stresses can affect valve operation. The reduced bore design solves this: larger outer diameter provides more resistant walls in critical areas, while smaller internal bore maintains required flow rates.

Result: Valves can withstand up to six times higher pipeline forces while delivering identical Kv values and flow performance.

Why DN15-6 instead of DN6?

DN15-6 uses DN15 connection dimensions (providing structural strength) with DN6 flow capacity. This combination delivers mechanical robustness where standard DN6 valves would be too fragile, while maintaining the exact flow characteristics your process requires.

Ideal applications

Installations with significant pipeline forces or thermal expansion stresses, Joule-Thomson effect applications requiring controlled pressure drop, subatmospheric pressure operation and low-pressure processes requiring reduced outlet velocity.

Available configurations

• DN15-10
• DN15-6
• DN25-15 with reduced bore geometry, plus
• DN80 PN40 and
• DN150 PN6 

These options expand our portfolio – existing standard configurations remain available.

Technical documentation

Complete specifications in data sheets 930219 (Bellows Valves), 20150066 (Control Cone), and 930435 (Heat Input).

Application guidance

Our engineering team can assess whether reduced bore configurations benefit your installation, particularly where pipeline forces, thermal cycling, or subatmospheric operation create mechanical challenges.

Get in touch with our experts today for a personalized consultation.