UNIVERS 1600 MANUAL & PNEUMATIC CRYOGENIC CONTROL VALVES

The Univers 1600 manual and pneumatic cryogenic control valve series is perfect for use at cryogenic temperatures down to LHe (1.8 K). These valves are supplied as standard with welding flanges for vacuum jacketing (custom sizes available on request).

The valve body optimises the heat input and allows for an optimal calculated flow rate (Kv value). The valves feature a "sniffle hole" (G1/8” thread) to detect chamber/pressure control for supervision of the stainless steel bellows seal tightness.

The pneumatic version of the valve features a pneumatic diaphragm actuator with a very small footprint for space saving on installation. The regulating/control version of the valve is offered with a high-value IP-Controller with various standard tranmission protocols, as well as memory function, limit switches and air filter regulators. The valves can be sized to accomadate various regulation ratios, such as 1:30/1:50/1:100 for extremely precise flow control. Regulating cones can be designed to deliver bespoke characteristics, even for very low pressure control rates down to < 1 BAR.

The Univers 1600 series valves can optionally have Soldered Cu flangse as thermal couplings, positioned along the extended stem. Sliding thermal contacts can cool the valve plug from the stem extension outer tube. High flow surface treatments, such as electropolishing or passivation are available for decreased blistering.

Features and Benefits:

• Angled body pattern for optimal flow conditions
• High Kv values
• High control accuracy
• Low heat input
• Sniffer bore for monitoring tightness of the bellows seal
• Venting/de-gassing facility
• Numerous options for optimum LHe processing (Cu cold shield on the outer tube of the spindle extension, sliding heat contacts between the spindle and inside of the outer tube and non-metallic valve spindles)
• Various regulating cones for different control characteristics
• Special version available for operating pressures of less than 1 bar
• Available as part of the Stoehr XXS or XXL Series for small sizes down to DN2 all the way up to large DN300

Technical Specifications:

• Valve Function: Bellows Sealed On/Off Valve or Regulating Control Valve
• Temperatures: Cryogenic Media from -271°C up to +50°C as Ambient Media
• Nominal Diameters: From DN2 to DN300
• Pressure Range: Up to PN40 (or PN1 as special very low pressure version)
• Actuation Types: Manual or Pneumatic Actuation
• Body Material: Stainless Steel
• Media: For N2, O2, Ar, H2, He, NG, LHe and more dangerous, toxic and acidic gases on request

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, cryodewars, test & measurement rigs, cryogenic and chemical transfer lines, gas filling stations, rocket fuelling 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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