valves and components for gas industry
cryogenic and high-pressure engineering
aerospace, marine and energy industry



UNIVERS 1600 – a new stainless steel universal globe valve for a wide range of applications with optimized cv-value.


UNIVERS 1600 Series with best Cv values in class

The shipped globe and control valves of STÖHR series 1600 even at large sizes feature best Cv values and prevailed against a well-known competitors.

The promised flow rates were measured by a sworn expert and have thereby confirmed the agreed maximum flow rates:
DN 80 / PN 10 at 160 m3/h, DN 100 / PN 10 at 250 m3/h.
Valves were delivered with both manual and with pneumatic actuators.


Cryogenic valves from STÖHR ARMATUREN – Prepared with Valve Body Housing

STICKS and other cryogenic valves from STÖHR now available with factory-provided multi-layer adsorption insulation material and body housing for the quick use in vacuum insulated pipes.

For a quick installation within the vacuum insulated piping system, cryogenic valves from STÖHR ARMATUREN can be ordered with pre-installed housing provided by the factory as option. The prepared housing is available for all cryogenic valve series, however it is especially useful for the standardized cryogenic valves of the STICKS series with its insert concept. For preparation, the valve body will be wrapped with a multi-layer adsorption insulation material achieving high thermal quality. The housing made ​​of stainless steel will then be welded to the standard pre-installed welding flange. The encased cold valves can afterwards be installed directly into rigid or flexible transfer lines without further machining by the customer. The encased valves are either preconfigured with optional couplings (STÖHR-Johnson coupling or other customer specific design) or with open pipe for connection to the plant.



Lower heat input by reduced mass of the valve body STICKS 900S contributes to increasing the performance of the cryogenic plant.

The widely used series STICKS of STOEHR ARMATUREN for use in vacuum-insulated lines has gained another product advantage in addition to its attractive insert concept. The cryogenic valve with nominal diameters of DN15 and DN25 in the pressure range up to 25 bar (PN25) was optimized by shaping the valve body and thus by reducing the overall mass. Mass reduction was achieved for the nominal diameter of DN15 at about 45 g (-30%), and for DN25 up to 370 g (-40%). This advantage is significant especially for use at applications of liquid helium.
This mass reduction not only facilitates the assembly of STICKS, but also reduces the heat input into the overall system. The formation of gas is reduced by minimized time for cooling down of the cryogenic system.
The valve is therefore ideal for applications of liquid helium (LHe).

Also manufacturers for vacuum-insulated lines benefit from the new housing design since using the STICKS series now allows smaller tube diameters which reduces cost significantly.
The cryogenic valve series STICKS with insert concept thus continues to represent an attractive product for plant construction and plant operation.



Europe prepares for new technologies on future missiles: high-thrust rocket engine equipped with STÖHR valves

The European Space Agency (ESA) and the German Aerospace Center (DLR) work together on new ways of dealing with fuel delivery systems for Europe's future launcher systems. For this, the TEXUS-48 launcher was sent to a thirteen-minute test flight from Kiruna (Sweden). For the complete simulation of a full-fledged space flight two new components, so-called Propellant Management Devices, were tested during the six-minute phase of weightlessness for use in hydrogen and oxygen tanks.

Both experimental modules of the TEXUS 48 test vehicle developed by ASTRIUM were each equipped with three axial flow valves of the STÖHR AXIUS series. The experimental testbed TEXUS 48 is used to study functions under μ-g conditions and the development of the Propellant Management Device. Simply put, the behavior of the liquid fuels hydrogen and oxygen in zero gravity and the valve design for new ignitions are being investigated. This was tested successfully using valves from the AXIUS series of STÖHR.

The Propellant Management Devices placed in the upper grades and at the tank outlet are designed to provide optimal supply and bubble-free dispensing of liquid oxygen and liquid hydrogen to the turbo pump of the engine, so that a counter-ignition is guaranteed during the flight phase at any time.

Liquid nitrogen was used during the TEXUS 48 mission as test fluid. The STÖHR AXIUS valves were installed within the deep cold tank of the space rocket and have proven their reliability even under extreme conditions. The special requirements of ASTRIUM on weight, size and the bellow sealing were fulfilled to 100 percent.

STÖHR AXIUS valves of can be used at operating temperatures between 4K and 323K. The nominal pressure ranges up to 420 bar with a control pressure of 6 to 8 bar, optional up to 40 bar. They are suitable for all media and are available in various sizes from DN4 to DN40.




Compact cryogenic valve with integrated pneumatic actuator

Typical cryogenic valves on the market are space consuming due to their large distance between the actuator and the medium. Conventional actuators lose power when they are exposed to temperatures below -40 degrees Celsius. Conventional cryogenic valves are therefore designed with long valve body and stem to position the actuator as far as possible from the cryogenic medium to avoid freezing as well as condensation. This leads inevitably to increase of height to almost double.

With its actual development FREES compact, STÖHR ARMATUREN developed a very compact valve with integrated actuator achieving various advantages:
- pneumatic drive suitable for use in cryogenic applications (up to -196 degrees Celsius),
- maximum possible height reduction,
- total weight reduction,
- smaller footprint of the actuator,
- unrestricted fitting position in vacuum-insulated pipes, i.e. installation upside-down, also for the pneumatic actuator.

The 6-bar industry standard for the operating pressure of pneumatic valves could be retained. Also maintainability of valve stem and actuator were achieved which means easy installation and removal of actuator and valve insert unit is possible without opening the vacuum system. Change of actuator can be performed without opening the media space which means that no system downtime is required. In addition, life cycle of the pneumatic actuator was significantly extended by replacing O-ring seals with bellows instead. Overall, by its compact design a lower use of material could be achieved.

For the prototype a number of different ideas were implemented, for example using the dead space for functional units, avoiding long valve stems, replacing stainless steel components with alternative materials, using stainless steel pneumatic cylinders of variable length as well as separating of mounting and sealing forces.

New features are the replacement of heat-transmitting stainless steel components by special cryogenic-grade plastics including pressure and force transmitting parts in cryogenic areas such as the valve stem. In addition minimized frictional forces and an overall low-wear design were achieved.



New globe valve for the transport of hazardous goods

The European Convention on the Carriage of Hazardous Goods by road (ADR) contains special rules for road transport in terms of packaging, freight securing and identification of hazardous goods. Amongst others, the ADR rules the classification of goods to be transported as hazardous goods and their associated security measures, the construction of containers, tanks and vehicles for transport as well as their multimodal transport (road - train, boat or plane).

So far, not all transports of hazardous goods were covered by the ADR such as the transport of rocket fuel in space industry. Therefore it was targeted to develop a universal globe valve leading to a lower-cost solution due to subsequent series production instead of specific valve developments. In addition, transports can be insured due to the new certification. STÖHR ARMATUREN in cooperation with its development partner ASTRIUM*, the leading European space company, as initial customer and operator developed the valve series LOCKS complying with TPED (EU directive on transportable pressure equipment), ADR, RID (rail) and IMDG (maritime). Also requirements of the clean air act (TA Luft) are met.

The development is completed and the valve is currently in the certification process for the approval of the Pi mark for 2013. While valve sales for applications for various transportable rocket fuels will be made by ASTRIUM, the globe valve for all other caustic, toxic or explosive liquids can be obtained from STÖHR ARMATUREN. The valve will be available as cylinder, straight-through or angle valve. Various end connections will be available.

STÖHR products have already been approved for transport of hazardous goods since 1988, so the company has a long track record in this field. The LOCKS demonstrator is shown on the VALVE WORLD 2012 on stand A82 in hall 3 of STOEHR ARMATUREN.



Spring less non-return valves cut pressure drops

Springless non-return valves introduced by STÖHR ARMATUREN create a smaller pressure differential when open compared with conventional spring operated check valves. By using a magnetic field rather than a spring to provide the closing force, the MAGROS valves reduce energy losses, eliminate shutter vibration and offer improved reliability.

Traditional spring check valves produce increasing resistance as the shutter opens and the spring becomes more compressed. However, with MAGROS valves the magnetic closing force decreases as the shutter opens further. The minimum cracking pressure is also low at less than 0.1 bar.

The valve body of MAGROS is machined from solid stainless steel, with surfaces in contact with the product machined, ground, electrolytically polished or passivated. The valves are suitable for gases and liquids in the temperature range from -40 °C to +50 °C.

Cryogenic models are also available, suitable for fluid temperatures between -196 °C for nitrogen (down to -271 °C for helium in special execution) and +50 °C and with a minimum cracking pressure of less than 0.03 bar.


STÖHR ARMATUREN was rewarded with the seal of quality for "Innovation by Research" by the Stifterverband für die Deutsche Wissenschaft (Founding Association for German Sciences) and is a permanent corporate member of following cryogenic associations: Deutscher Kälte- und Klimatechnischer Verein | Cryogenic Society America, Inc. | British Crygenics Council |

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