Low temperature stop valve, model preparation of low temperature stop valve, executive standard of low temperature stop valve
Time: 2021-05-24 14:36:12 Source: Yonglong Valve Reading: zero second
Low temperature stop valve, model preparation of low temperature stop valve, executive standard of low temperature stop valve
The stem axis of the low temperature long shaft stop valve is perpendicular to the sealing surface of the valve seat. The valve rod has a relatively short opening or closing stroke and a very reliable cutting action, making this valve very suitable for cutting off, adjusting and throttling as a medium. It is mainly used in low temperature liquid medium systems such as liquid oxygen (liquid nitrogen, liquid argon). It has the characteristics of flexible switch, reliable seal, withstand voltage, etc. It is also suitable for the switch system of low temperature liquid storage and transportation equipment.
Low temperature stop valve - application case of carbon dioxide storage tank
Model preparation of low temperature stop valve:
1. Add D before the stop valve model, and D is the first letter of low-temperature pinyin
2. DJ11F-40P is the type of internal thread
3. DJ21F-40P is the model with union welding
4. DJ41F-40P is flange connection type
5. DJ61F-40P is a welding type
6. Add 6 before the model number, which is pneumatic, such as DJ641F-40P, pneumatic low temperature stop valve, and add 9, which is electric, such as DJ961F-40P, electric low temperature stop valve.
Executive standard of low temperature stop valve:
1. Design and manufacture: JB/T7749-95
2. Structure length: GB/T12221-89
3. Connecting end: GB/T9113-2000, HG20592-97，SH3406-96GB/T12224-89
4. Inspection and test: JB/T7749-95
Low temperature stop valve liquid oxygen storage tank application case
The material of low temperature long neck stop valve working at low temperature should ensure its low temperature performance, mainly to ensure its cold impact strength. The valve trim must be properly selected to have sufficient cold impact strength to prevent fracture. The impact strength of C and Cr alloy steels will soon lose when the temperature is below - 20 ℃, so the use temperature is limited to - 30 ℃ and - 50 ℃ respectively. Nickel steel with 3.5% Ni content can be used up to - 100 ℃, and nickel steel with 9% Ni content can be used up to - 196 ℃.
Low temperature stop valve Alternative name: short shaft low temperature stop valve low temperature short shaft stop valve long shaft low temperature stop valve low temperature long shaft stop valve short diameter low temperature stop valve low temperature short diameter low temperature stop valve low temperature long diameter low temperature stop valve long neck low temperature stop valve low temperature long neck stop valve short neck low temperature stop valve low temperature long neck stop valve short neck low temperature stop valve low temperature short neck stop valve
[Recommended reading] / TECHNICAL ARTICLES
