久久人人97超碰精品888 I 亚洲欧美日韩国产综合 I 99久久精品久久久久久ai换脸 I 白丝美女操出白浆 I 久久久久久欧美 I 日本国产极品诱惑 I 国产精品乱码久久久久久 I 成人综合日日夜夜 I 老司机午夜精品视频在线观看 I 精品亚洲成av人在线观看 I 9i免费看片黄 I 免费成人美女在线观看. I 999av电影 I 国产成人综合亚洲91猫咪 I 激情伦乱视频 I 久久麻豆一区二区 I 青娱乐极品盛宴一区二区 I 欧美精品久久99 I 成人激情视频免费在线 I 另类激情文学 I 国产片av在线免费观看 I 56国语精品自产拍在线观看 I 国产日韩视频在线观看 I 日本高清中文字幕有码在线 I 成人aaaa免费全部观看 I 天堂а√在线8种子蜜桃视频 I 国产成人免费视频 I 欧美美女啪啪 I 国产精品天干天干在观线 I 亚洲精品国产动漫 I 国模一区二区三区私拍视频 I 国产噜噜噜噜久久久久久久久 I 欧美三级乱人伦电影

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