Type 3248 Cryogenic Valve

Daddy Cool

Liquefied gases, such as hydrogen, are generated, transported and stored at cryogenic temperatures near absolute zero. Such temperatures call for specially engineered valves capable of resisting these cryogenic temperatures. The Type 3248 Cryogenic Valve is such a valve; it is also suitable for installation directly in the cold-box. To facilitate installation and achieve an optimized flow of the liquefied gas, the valves are available with globe- and angle-style bodies.

Features at a glance

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No chance for embrittlement

All wetted valve parts are made of materials with defined alloy compositions. They withstand the extremely low temperatures, showing no signs of impaired strength and viscosity even after longer periods in operation.

Maintenance made easy

The valves come with a top-entry design. As a result, service and maintenance work on the trim parts can be performed without having to remove the valves from the pipeline, cold-box or insulation. After the actuator has been removed, there is free access to the valve seat and plug through the cryogenic extension bonnet.

Minimized emissions

Thanks to their bellows seal, the valves comply with the strictest emission requirements according to ISO 15848. Fugitive emissions are minimized and in hydrogen service the flammable, explosive gas is prevented from escaping.

Type 3248 Cryogenic Valve

Excellent reliability

The valves for liquid hydrogen can master the challenges posed by the combination of cryogenic medium temperatures and hydrogen as the process medium; they minimize the heat intake from the atmosphere to the inside of the valves. This ensures that the hydrogen, which has been cooled down arduously, retains a constant temperature. Additionally, the valves withstand the hydrogen, which has a tendency to permeate their material structure and cause stress corrosion cracking. All wetted parts retain their strength and proper functioning over a very long period of time.

The valves' reliable functioning is guaranteed by qualifications of the welding procedures and weld fillers with slow strain rate testing (SSRT) performed on pressure equipment and pressure accessories as well as by optional, in-production function tests.

Optional vacuum jackets, vacuum sleeves or cover plates make the valves suitable for installation in the cold-box and almost completely prevent any heat intake from the atmosphere to the inside of the valves, which ensures a constantly low temperature of the process medium.

Actuators, positioners, solenoid valves or supply pressure regulators: no matter which pieces of equipment you need, SAMSON offers you fully fledged control valves from a single source. Benefit from the direct attachment option to mount accessories on small and medium-sized valves to considerably reduce the required piping and hook-up work.

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ACHEMA 2022

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SAMSON valves for the hydrogen value chain

Hydrogen network feed-in

Hydrogen generated from renewable energy sources can be fed into existing (natural) gas networks. Once in the pipeline, it can be used in power generation or heat supply applications. This presents a sustainable solution for the storage and conversion in energy networks based on renewable energy sources.
Green hydrogen

The electricity required to produce green hydrogen is generated in solar-thermal power plants, for example. In such plants, solar radiation is bundled by reflectors (mirrors) to heat up oil, water or molten salt for the downstream generation of steam to generate electricity. SAMSON has the right solutions to meet the strict material and control accuracy requirements that apply throughout the entire process.
Electrolysis

Green hydrogen is generated by decomposing water into hydrogen and oxygen using renewable electricity. In the different procedures, precise, rugged control is necessary to guarantee the highest levels of efficiency and reliability in supply and the output stages across a wide load range. For years, products by SAMSON have been used successfully in our customers' plants.
Ammonia generation

Green hydrogen and nitrogen are fed into high-pressure reactors for the sustainable production of ammonia. Ammonia is more than an essential intermediate product in the production of fertilizers; it can also serve as a high-density fuel. To ensure proper control of the media at high temperatures and pressures, SAMSON valves are a proven, rugged choice.
Liquefaction and transport

Hydrogen is cooled down in several stages to liquefy it. The two main methods used are the Joule-Thomson effect and Claude's process. Tanker ships or tank trucks are used for transport. The SAMSON control equipment necessary for liquefaction and transport, which comes with a design temperature of –253 °C, has been proven in service for many years.
Refineries

In refineries, hydrogen is used in crude oil refining processes: In hydrocracking, hydrogen serves to break long-chain hydrocarbon molecules. In hydrotreating, hydrogen is used to remove sulfur and other unwanted compounds from petroleum products through hydrogenation. SAMSON has been supplying valves, actuators, explosion-protected positioners, limit switches and solenoid valves for these key applications for decades.
Hydrogen refueling stations

Hydrogen is stored as a liquid to reduce its volume. When refueling vehicles, the cryogenic hydrogen is evaporated and subsequently compressed before it is introduced into the vehicle tank. At many stations, SAMSON self-operated regulators are used to control the pressure during the evaporation process.
Chemical industry

The industrial-scale production of high-purity polysilicon for microelectronics and solar panels mainly takes place in a process that is based on chemical vapor deposition using trichlorosilane and hydrogen. Control valves by SAMSON even surpass the highest purity levels to be met and, thanks to exact control, they guarantee reliable operation, prime quality and high yields..