Cryogenic Valves

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Overflow valve made of gunmetal, angle-type with threaded connections

The overflow valve is characterised by the fact that it ensures a continuous and quiet pressure reduction when used on tanks for the storage of cryogenic liquefied technical gases such as argon, oxygen, nitrogen or carbon dioxide. 

The overflow valve is adjusted to a pressure below the set pressure of the safety valves and thus prevents the safety valves of the tank from reacting. When the safety valves are fully opened, loud outflow noises are generated, which in most cases also significantly exceed the Immission guide value of TA Lärm (technical instructions for protection against noise) and deprive the neighbourhood from sleep. Thus, the response of the safety valves is often interpreted as a malfunction of the storage system and leads to the activation of the emergency plan including fire brigade, police and rescue services.

Using the overflow valve type 2580 can prevent this scenario.
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Shut-off valve made of gunmetal, in straight form

The series 2180 is characterised by a corrosionresistant, lead-reduced gunmetal housing and a stainless steel valve upper section. The design is identical to that of the series 2140 and therefore offers an excellent price-performance ratio. The valve cone is made of CW617N brass and adapted to the high-quality stainless steel valve spindle. Threaded and soldered sleeve connections are available. The series also meets the requirements of DIN EN 1626.

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Diverter ball valve made of gunmetal with pipe / threaded connection

Diverter ball valve for the installation of for example two safety valves in combination with bursting discs for the protection of containers designed for the storage of cryogenic gases.

The requirements of the PED relating to redundant or diverse safety devices are fulfilled by this fitting in combination with safety valves of the 2400 / 2480 series. On each side two additional connections for bursting discs are available.

In case the safety valves need to be maintained or the bursting discs replaced, the side requiring maintenance can be shut off.

With the series 2783, an extension of the connection options is also available for this type.

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Safety valve made of gunmetal, angle-type with threaded connectionsThe well proven safety valves series 2400 made of stainless steel receive a variant sister series, type 2480, that is made of gunmetal. It is characterised particularly by an increased outlet by one or two nominal diameters. Thus, within one valve size, there are two different performance classes available. Functionality and performance comply exactly with the sister series and it is just as stable in terms of function and high performance capability. All valves made of gunmetal are as a matter of course suitable for oxygen use and comply with basically all common delivery requirements of international standards like DIN EN, ASTM, EIGA and CGA as well as the specifications of the gas producers.

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Shut-off valve made of stainless steel, straight-through type

The main function of the 2140 shut-off valve is the controlled opening and closing of pipeline sections via the valve seat integrated in the body. Due to the use of high-quality materials, the fitting can be used for cryogenic operation at temperatures down to -196°C. The shut-off valves are approved according to DIN EN 1626.
The series is available in the nominal widths DN10 - DN50 and can be designed with connection options for welding ends and welding sockets. The manual valve actuator is operated via an ergonomically shaped handwheel, the open/closed position can be seen at all times via a visual position indicator.
The valve upper section can be configured with three different actuator lengths depending on the application and operating environment. 

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Diverter ball valve made of stainless steel with threaded connections

The optimal design of the flow channels within the diverter ball valve enable particularly high flow rates. This significantly reduces flow pressure losses to the safety valves and safe operation remains ensured.
The use of 1.4404 and 1.4408 high-alloy stainless steels enables high resistance against internal and external influences.
For the use with gases that are in contact with food an FDA-compliant sealing material has been used. Thanks to the oil- and grease-free manufacturing process, the diverter ball valves are suitable for use in systems using oxygen. With the ergonomically shaped handle and the separate testing connections, the diverter ball valve is optimally prepared for the maintenance of the safety valves. 
 

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Diverter ball valve made of gunmetal with threaded connections

As already implemented with the stainless steel series 2700, the gunmetal diverter ball valve 2780 possesses a flow geometry with very low pressure loss. The safe functionality of the safety valves mounted on the diverter ball valve is therefore better ensured. Additionally, opposite to the vertically mounted safety valves, there are also connections for bursting discs available. Due to the consistent cleaning of all component parts, the gunmetal diverter ball valve is also optimally suited for use in systems using oxygen.

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Diverter ball valve made of gunmetal with threaded connections

As already implemented with the stainless steel series 2700, the gunmetal diverter ball valve 2780 possesses a flow geometry with very low pressure loss. The safe functionality of the safety valves mounted on the diverter ball valve is therefore better ensured. Additionally, opposite to the vertically mounted safety valves, there are also connections for bursting discs available. Due to the consistent cleaning of all component parts, the gunmetal diverter ball valve is also optimally suited for use in systems using oxygen.

Additional connection options are provided for series 2782
 

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Overflow valve made of gunmetal, angle-type with threaded connections

The pressure regulator of the series 2980 is designed for setting and controlling the vessel pressure on tanks used for the storage of cryogenic liquefied gases, such as LIN, LOX, LAr, LNG. The use of two high-quality stainless steel bellows, the lead-reduced gunmetal body material and the PTFE seat seal make the pressure regulator suitable for a wide temperature range. The pressure regulator is available in three different spring packages and can be individually adjusted up to 38 bar. The pressure regulator is characterised by temperature resistance and an excellent control quality combined with a compact design.

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Safety valve made of stainless steel, angle-type with threaded connections.The safety valves of this series have been awarded full approval for vapours and gases as well as for liquids. All components of the valve are specially cleaned during the production process and are thus oil- and grease free in accordance with DIN EN 12300. Because of this every valve is suitable for use in systems using oxygen and is accordingly marked. The use of 1.4404 and 1.4408 high-alloy stainless steels renders the safety valves particularly resistant to extremely cold temperatures. For the use with gases that are in contact with food an FDA-compliant sealing material has been used.
The valve setting and seat insert are separately sealable which makes unauthorised adjustments easily noticeable. Overpressure from 0.2 bar up to 70.0 bar is purged safely with a consistently high level of performance.

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Diverter ball valve made of gunmetal with pipe / threaded connection

Diverter ball valve for the installation of for example two safety valves in combination with bursting discs for the protection of containers designed for the storage of cryogenic gases. The requirements of the PED relating to redundant or diverse safety devices are fulfilled by this fitting in combination with safety valves of the 2400 / 2480 series. On each side two additional connections for bursting discs are available. In case the safety valves need to be maintained or the bursting discs replaced, the side requiring maintenance can be shut off.