WEKA CRYOGENIC QUENCH VALVE

The WEKA quench valves (or cryogenic safety valves) were developed and manufactured in the sizes DN20 and DN40 and are activated at a set pressure of 20 bar. Due to the unique design of the valves, this response pressure is independent of the counterpressure in the collecting vessel.

The valves are classified as equipment part with safety function according to PED 2014/68/EU; accordingly, the harmonised standard EN ISO 4126 has been considered in the development.

As the valves are required to release cryogenic gas, they have a vacuum weld-in flange, a cold seat and a cryogenic extension to keep the heat input to a minimum. The heat input can be further reduced by means of an optional thermal connection.

The safety function is realised outside the cold box in the warm area by means of a mechanical spring system which will seal the valve tightly up to the defined response pressure. In addition, a pneumatic piston drive allows for the manual opening of the valve.

General Technical Specifications:

• Pressure: ≤ 25 BAR
• Temperature: 8 to 10 K (-265 to +263°C) 
• Nominal Diameter: 20mm to 40mm
• Set Pressure: 20 BARG (±0.5 BARG)
• Opening Pressure: 21 to 22 BARG
• Closing Pressure: > 6 BARA  

WEKA are a market leader in the manufacturing of cryogenic valves and accessories for critical high-tech and R&D applications. The WEKA product portfolio specialises in the regulation and control of gases/fluids, with media temperatures close to absolute zero.

We can help with manual, pneumatic and electric cryogenic valves in shut-off, control and check/non-return designs. Additionally, the product portfolio is completed by high-pressure valves, ejectors and transfer line couplings.