Product center
DQ347Y type low temperature ball valve
【Product use】
Cryogenic ball valves are mainly used in ethylene, liquefied natural gas installations, natural gas LPG LNG storage tanks, receiving bases and satellite stations, air separation equipment, petrochemical exhaust gas separation equipment, liquid oxygen, liquid nitrogen, liquid argon, carbon dioxide cryogenic storage tanks and tank trucks, pressure swing adsorption oxygen production and other devices.
【Product features】
1.According to the standard requirements, ball valves with a temperature below -50℃ generally adopt a long-neck structure design to increase the temperature of the packing and ensure the reliable sealing of the stem packing. The neck length is generally designed according to the standard requirements. If the user has special requirements, it can also be according to the contract requirements.
2.Valves used for cryogenic media. When the valve is in the closed position, the cryogenic liquid medium trapped in the valve cavity expands sharply due to gasification when the temperature rises, resulting in an abnormal increase in the pressure in the valve cavity, which can seriously cause accidents such as valve rupture.The company's ball valve has the function of automatic pressure relief in the middle cavity. When the middle cavity is abnormally boosted, the medium in the middle cavity can rely on its own force to push the valve seat and automatically release the pressure, thereby ensuring the safety of the valve.
3.The parts of the valve are treated at low temperature to ensure the stability of the shape and size of the parts at low temperatures.
【Technical specifications】
| Design basis |
GB |
API |
ASME |
|
| Design standard |
GB/T 12237 |
API 6D |
ASME B16.34 |
|
| Structure length | Connecting flange |
GB/T 12221 |
API 6D |
ASME B16.10 |
| welding | ||||
| Connecting flange |
GB/T 9113 JB/T 79 |
ASME B16.5 ASME B16.25 |
||
| Butt welding end |
GB/T 12224 |
ASME B16.25 |
||
| Test and inspection |
GB/T 13927 JB/T 9092 |
API 6D |
API 598 |
|
【Product performance specification】
| Valve model | Valve specifications |
Applicable temperature（℃） |
Applicable media | Material | Connection method | Operation method |
|
(K)Q41、(K)Q341、(K)Q641、(K)Q741、 (K)Q841、(K)Q941 |
1/2”~8” DN15~200 PN16~PN100, CL150~600 |
-196～570°C |
Cryogenic liquid oxygen, liquid nitrogen, liquid argon, carbon dioxide, etc. |
WCB,CF8,CF3,CF8M,CF3M，4A,5A,Monel，Incoloy etc. |
Welding, flange | Handle, handwheel, gearbox, electric, pneumatic |
Contact us
WeChat public account: Beijing Valve General Factory Co., Ltd.
switchboard: 010-8928 3399
fax:010-8928 3802
Sales hotline：010-8928 3800、010-8928 3399转2288
mailbox：bvmc@bvmc.cc
Address: No. 3, Lvhai Road, Pangezhuang Town, Daxing District, Beijing
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