XXL EXTRA LARGE CRYOGENIC BELLOWS VALVES FOR BESPOKE APPLICATIONS

Extreme media temperatures, extreme pressure levels, extreme tightness and extreme dimensions. We can help you with precise control valves for scientific applications, media resistant globe valves for the chemical industry, miniaturised blow-off valves for space probes, fine-meshed gas strainers, gigantic valves for gas exploration. Our special cryogenic valve solutions are in operation at thousands of sites worldwide and reliably working 24/7.

From "XXS" to "XXL" size, our valves meet the highest quality expectations and requirements for acceptance with our customers. Especially for large nominal diameters up to DN300.

Stoehr has developed a family of cryogenic and ambient valves with stainles steel bellows sealing and strainers adapted from the successful series Univers 1200, Univers 1600 and Frees 1200 control valves, on/off shutoff valves, non-return/check valves and gas filters both for cryogenic or ambient temperatures. Sealing with bellows protects against leakage to the environment and offers additional safety for both plants and personnel, combined with the highest energy efficiency possible.

Technical Specifications:

• Valve Function: Bellows Sealed On/Off Shut-Off Valves, Control/Regulating Valves, Non-Return/Check Valves and Filters/Strainers
• Temperatures: Cryogenic Media from -271°C up to +50°C as Ambient Media
• Nominal Diameters: Large Sizes of DN125, DN150, DN200, DN250 and DN300
• Pressure Range: PN10, PN16, PN20, PN25, PN32, PN40 and PN50 (Depending on valve size)
• Actuation Types: Manual (Gear-Box Assisted, Electro-Pneumatic or Hydraulic
• Body Material: Stainless Steel (316L Stainless Steel) or Specialty Alloys on request
• Media: For He, Ar, H2, O2, N2 in gaseous or liquid form and more dangerous, toxic and acidic gases on request
• Tightness: High Leak Tightness Ratings (Up to Helium Leak Tightness of 10E-8 mBAR L/sec to environment, 10E-6 mBAR L/sec through seat)
• Certifications: Quality Management based on ISO 9001:2015, Pressure Vessel Regulations, AD2000-W2 H0, ATEX Regulations and more
• Special Options: Including detection chambers, seawater resistant designs, increased pressure up to PN50, optimised flow coefficient, fast acting opening/closing times, manual override, manual spindle locking, gearbox assisted for manual handwheels, outside coating, free installation in any position and many more tailored options on request.

Optional Services & Information Includes:

• Designed and tested in accordance with PED 2014/68 / EU and AD 2000
• Issuing the EU Declaration of Conformity including affixing the CE mark
• ATEX conformity
• Declaration of conformity SIL acc.IEC 61508
• Vision test with control of weld DIN EN ISO 5817
• Functional test DIN EN 12266-2
• Hydraulic pressure test (at factor 1.5 time x PN) acc. to DIN EN 12266-1
• Leak tests for control of leackage to the environment (water bubble test, helium leak test DINB 1779)
• LIN cold test
• Final Acceptance Test (FAT) in presence of customer representative and/or external auditor (TPI)
• PMI (Material Testing)
• Non-destructive tests including X-Rays for welds and pressure bearing parts, ultrasonic testing acc. to DIN ESO 22825 and colour-pentration testing acc. to DIN EN ISO 3452

Our entire range of Stoehr valves is utilised across many industries including industrial & specialty gases, research & development, aerospace & defence and renewable energies. Our cryogenic valves can be used in the most cutting-edge applications such as vacuum jacketed lines (VJ lines) or super insulated vacuum lines (SIVL), cold boxes, liquefiers, cryostats, high pressure and demanding test & pilot rigs, cryogenic and chemical transfer lines, gas filling stations, transportation vessels, specialty refuelling lines and more.

For information or advice on special design/custom cryogenic valves solutions, please get in touch with our experienced engineering team. Our full selection of cryogenic valves can be made available with various actuators, including diaphragm, piston or electric, solenoid valves, position regulators, a selection of cone designs, purge ports, vacuum jacketing, sealing options, surface treatments and certifications.

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