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MVS Cryomech - Liquid Nitrogen Plants
Cryomech Liquid Nitrogen Plants center their robust and versatile design on the principles of the Gifford-McMahon Cryocooler. The modular system comes fully integrated with an on-site gas generator from MVS Engineering. At a small scale, the system is designed to be mobile and fit into most user locations, regardless of space or environmental restrictions. Most maintenance can be performed in the field with minimal technical training. The systems are designed for long durations of use between service intervals.
- Cryocoolers and compressors are built at their own factory in USA
- Cryomech’s founders were the inventors of the Gifford-McMahon (GM) cycle technology
- Fully automatic operation with single push button start
- Automatically enters into standby mode when the production dewar is full
- Dewar sizes 35-500 Liters
- Cryogenically insulated extraction line and valve for low loss Liquid Nitrogen transfer
- Long operation service in between maintenance intervals
- Most maintenance can be conducted by in-house operation personnel of the client
- Long life of components with very high availability rate
- Plug and play design. In most cases, customer only needs to provide electrical power and the system can be made operational in a few hours
All Cryomech Liquid Nitrogen Plants work with exactly the same group of components.
There needs to be a supply of nitrogen gas. Nitrogen makes up 78% of the air we breathe and can be separated from the rest of air’s components. Gaseous Nitrogen is produced from systems manufactured in India by MVS Engineering.
There is a storage vessel for the LN2. A dewar is a vacuum insolated vessel designed to store very, very cold liquids.
Gaseous Nitrogen from the MVS system is taken to a cryorefrigerator to condense the nitrogen gas inside the dewar into liquid. The source of Cryomech’s expertise is in the manufacture of Cryorefrigerators (Cryocoolers). Cryorefrigerators are machines that remove heat down to temperatures below 120K (-153° C).
The Cryomech Cryorefrigerator consists of a pair of stainless steel flexible helium lines, a helium compressor package and a cold head. The cold head is installed directly at the very top of the dewar in which the liquid nitrogen is to be collected. From the top, the cold head extends to the neck of the dewar to cool down the nitrogen to 77K (-196°C) that enters the dewar. Nitrogen gas changes its state to liquid when it comes in contact with the cold head heat exchanger. The liquefied nitrogen drips down from the heat exchanger into the dewar. The pressure inside the dewar gets typically lower in this process, but the regulator lets in more nitrogen in the dewar to maintain the pressure at the predefined level. In the dewar, the flow rate of nitrogen gas is regulated by the rate of liquefaction.
Founded in 1963 by Professor William E. Gifford, Cryomech is a world leader in compact liquid nitrogen and other cryogenic products. The founder of Cryomech is also famously known as the co-inventor of the Gifford-McMohan Cycle and the Pulse Tube Cycle. The first Liquid Nitrogen plant – the LNP40 was developed in the year 1992. Dr. Chao Wang developed the first commercially available 4K Pulse Tube Cryocooler in 1999. In 2007, Cryomech introduced the LHeP12 and 20 Liquid Helium Plants. In 2010, the first Cryomech Helium Recovery System was installed. In 2013, Cryomech developed the 1K Cryostat and released its second-generation Liquid Helium Plants with increased liquefaction rates and remote monitoring.