Which Valves Are Used in Cryogenic Service?

In cryogenic services, the common valve types include cryogenic ball valves, cryogenic gate valves, cryogenic stop valves, cryogenic butterfly valves, cryogenic check valves, cryogenic throttle valves and low cryogenic pressure. They are specially designed and selected for low temperature conditions to ensure sealing performance and operational stability. These valves are described in detail below:
Cryogenic ball valve: A 90-degree rotating sphere is used to open and close, with short travel time and fast opening and closing. Its valve body and valve cover are usually made of cryogenic materials such as LCB (-46°C), LC3 (-101°C), CF8 (-196°C), and neck structure is designed to protect the filling and prevent cryogenically induced sealing failure.
Cryogenic gate valve: A closed cover is formed between the gate valve and the seat to control the rise and fall of the medium by rotating the valve stem. It has the advantages of low fluid resistance, low the sealing surface corrosion, opening and closing, saving force, etc.. It is suitable for fluid cutting in low temperature environment. The structure consists of wedges (single door, double door, elastic gate type) and parallel gate type (single door, double door) and can be divided into open and hidden stem depending on the thread position of the stem.
Low Temperature Check Valve: A tight cover is formed between the disc and the seat, and the medium is controlled by disc rotation. Simple structure, excellent sealing performance, suitable for low temperature flow regulation and interception.
temperature butterfly: Control media flow by rotating butterfly plate. It has the characteristics of simple structure, small size and light weight. It is easy to operate in low temperature environments and is usually used in low temperature systems with strict spatial requirements.
Low temperature check valve: the valve disc deadweight or spring force to achieve one-way flow control. When the flow direction of the medium changes, it will automatically close, prevent the backflow of the cryogenic medium, cause damage to the system, and ensure the safe operation of temperature pipeline.
Low temperature throttle valve: by adjusting the gap between the core and valve seat to control the flow rate of the media, to maintain stable throttle performance in low temperature environment, so as to achieve accurate regulation of the flow rate of the low temperature media to meet the strict flow control requirements.
Low Cryogenic pressure: by adjusting valve core opening to change the dielectric pressure, maintain stable decompression performance in low temperature environment, ensure the low temperature system pressure in a safe range, prevent equipment damage or safety accidents due to abnormal pressure.