Dq41f-40p low temperature ball valve | introduction to stainless steel ball valve

Dq41f cryogenic ball valve is applicable to the management system of cryogenic liquid storage and transportation equipment. It has the characteristics of flexible switching and reliable sealing. It can also be used in the management system of other low-temperature and cryogenic media.

Dq41f-40p low temperature ball valve | features of structural design and processing and manufacturing of stainless steel ball valve:

Low temperature ball valves are divided into low temperature floating ball valves and low temperature fixed ball valves. For ball valves with a temperature higher than -50 ℃, the long neck structure is generally not used. For ball valves with a temperature lower than -50 ℃, the neck length t is generally 250mm, or it is determined according to the design and calculation of our company Low temperature ball valve is mainly used to output liquid low-temperature media such as ethylene, liquid oxygen, liquid hydrogen, liquefied natural gas, liquefied petroleum products, etc. it is not only flammable and explosive, but also needs to be gasified when heating up. When gasifying, its volume expands hundreds of times.

The materials of liquefied natural gas valves are very important. Unqualified materials will cause external or internal leakage of the shell and sealing surface; The comprehensive mechanical properties, strength and rigidity of parts can not meet the use requirements or even fracture. It will cause the leakage of liquefied natural gas medium and cause explosion. Therefore, in the process of developing, designing and developing liquefied natural gas valves, material is the primary key issue. Valve body and bonnet: LCB (-46 ℃), LC3 (-101 ℃), CF8 (304) (-196 ℃)

The low-temperature valves produced by our factory are specially treated at low temperature. The rough machined parts are placed in the cooling medium for several hours (2-6 hours) to release the stress, ensure the low-temperature performance of the material, and ensure the finish machining size, so as to prevent the leakage caused by the deformation of the valve due to temperature changes under low-temperature conditions.