Manual Butt Welding Long Stem SS304 Or SS316 Customize Pressure Cryogenic Ball Valve

Manual Butt Welding Long Stem SS304 Or SS316 Customize Pressure Cryogenic Ball Valve

Low temperature ball valve is suitable for low temperature medium such as methane, liquid natural gas, hexene, carbon dioxide, liquid ammonia, liquid oxygen, liquid nitrogen, liquid hydrogen and so on.

The cryogenic ball valve undergoes special low-temperature treatment, and the rough-machined parts are placed in the cooling medium for several hours (2-8 hours) to release the stress, ensure the low-temperature performance of the material, and ensure the precision processing size, to prevent the valve from operating under low temperature conditions , Leakage due to deformation caused by temperature changes. For medium temperature higher than -50℃, long neck structure is generally not used; for ball valves with medium temperature lower than -50℃, the neck length is generally 250mm, or determined according to our company's design and calculation. It 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 one of the indispensable important equipment in the petrochemical industry, air separation, natural gas and other industries. Its quality determines the quality Whether it is produced safely, economically and continuously.

1. The structure of opening a pressure relief hole in the valve core is adopted.

2. The gasket is made of ceramic filling material with stable sealing performance.

3. The valve body is light and small in size. In order to reduce the heat loss of the valve body, especially in order to ensure the use of the valve at ultra-low temperature, the valve body is specially designed to be light in weight and small in size.

4. The long shaft valve has a valve through which a low-temperature fluid flows, and adopts the form of a long valve stem, which can avoid the external heat and keep the gland at normal temperature to prevent the performance of the cover seal from degrading. This length is the best length obtained through calculation and experiment.

Through the low temperature performance test, to ensure the low temperature performance of the material and the comprehensive mechanical properties of the workpiece,Technical characteristics

Strength and rigidity

The stem has an elongated structure and the design includes a self-adjusting elongated system to compensate for the heat

Wear, tightening and expansion due to change

It has a structure to prevent abnormal pressure increase, and a pressure relief hole is provided to release the liquid trapped in the valve cavity

Overpressure caused by medium heating

Frequent operation under low temperature conditions, its internal materials are not jammed, scratched, etc.

Q: Are you trading company or manufacturer ?

A: We are manufacturer ,our own factory is located in Sichuan province,China

Q: How to control the quality of ball valve?

A: 1)Select high quality raw material.

    2)Strict required during machining.

    3)Tested twice to insure zero leakage.