精品中文字幕久久久无码,邻居少妇张开双腿让我爽一,国产免费拔擦拔擦8x,老熟女高潮一区二区三区,无码中文无码高清,国产精品久久久久久久水蜜桃

Gate Valve summary

Good sealing performance, fluid resistance is small, and has a certain adjustment performance;
But the size is large, the structure is complex, the processing is difficult, the sealing surface is easy to wear, not easy to maintain, the opening and closing time is long.
Suitable for making large caliber valves, in addition to steam, oil and other media, but also suitable for containing granular solid and viscosity of the medium, and is suitable for venting and low vacuum system valves.

Gate Valve Scope of application

1. Applicable medium range: water, steam, oil, oxidizing corrosive medium (Z42W-16Ti), acid, alkali flue gas, etc. 

2. Gate valve is suitable for steam, high temperature oil and oil and gas and other media, and frequent switch parts, not for easy coking medium;

3. Single gate or double gate soft seal open stem flat gate valve is used for urban gas transmission pipeline; 

4. Urban water works, single gate or double gate without guide hole rod flat gate valve;

5. For pipelines with suspended particle media, use knife shaped flat gate valve;

Gate Valve standard

• AP I600/ISO 10434 :Bolted steel gate valves for oil and gas
• BS 1414 :Steel gate valves for petroleum, petrochemical and refining industries
• API 603 :150LB corrosion-resistant flanged cast gate valve
• GB/T 12234 :Flanged and butt-welded steel gate valves
• DIN 3352 : Gate valve
• SHELL SPE 77/103 :Steel gate valve according to ISO10434