Cryogenic Ball Valve
Cryogenic Ball Valve is a high-performance valve type designed for extremely low temperature working conditions. It is generally used for the control and emergency shut-off of liquefied natural gas (LNG), liquid nitrogen, liquid oxygen, liquid argon and other media. In extremely cold environments, it is matched with a suitable actuator to achieve the purpose of fine control of the medium.
There are significant differences in design and performance between Cryogenic Ball Valves and ordinary ball valves, which are mainly reflected in material selection, structural design, sealing performance, manufacturing process and applicable working conditions. The following are the main differences between the two:
|
Features |
Cryogenic Ball Valve |
Ordinary ball valve |
|
Operating temperature range |
Below -46°C, even as low as -196°C |
Usually suitable for -29°C to 200°C |
|
Material selection |
The valve body and key components are made of low-temperature resistant materials (such as stainless steel, low-temperature alloy steel), and the sealing material is PTFE or special low-temperature rubber |
The valve body material is mostly carbon steel, cast iron or stainless steel, and the sealing material is ordinary rubber or PTFE |
|
Bonnet design |
The long-necked bonnet structure is used to prevent external heat from entering and avoid ice or freezing |
Ordinary bonnet design, no special insulation or antifreeze function |
|
Sealing structure |
Double sealing design to ensure zero leakage under ultra-low temperature conditions |
Single-layer sealing design, suitable for general working conditions |
|
Antifreeze and insulation design |
Equipped with insulation layer or electric heating device to prevent low-temperature media from affecting the external structure of the valve |
No special antifreeze or insulation design |
|
Manufacturing process |
Key components need to be cryogenically treated and ultra-low temperature tests (such as liquid nitrogen tests) must be carried out before leaving the factory |
No cryogenic treatment is required, conventional pressure test is sufficient |
|
Operation method |
The operating mechanism has antifreeze and anti-jamming functions, and supports manual, gear transmission, electric or pneumatic operation |
Conventional operation method, no special antifreeze design |
|
Applicable media |
Liquefied natural gas (LNG), liquid nitrogen, liquid oxygen, liquid argon and other cryogenic media |
General media such as water, steam, oil, gas, etc. |
|
Application areas |
LNG storage and transportation, air separation equipment, cryogenic chemical industry, aerospace and other fields |
General industrial pipeline system, water supply and drainage system, etc. |
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