又大又硬又黄又刺激的免费视频-国产成人女人毛片视频在线-久久婷婷五月综合色一区二区-91在线一区二区-亚洲精品男人的天堂-香蕉久久久久久-欧美一区二区三区久久-亚洲精品午夜精品-仙踪林少妇高潮在线观看-日韩在线三区-无码精品久久一区二区三区-国产成人午夜在线视频a站-欧美一级淫片-精品av国产一二三四区-日韩一区二区三区在线观看视频

Ball Valve summary

Ball valve has the advantages of simple structure, quick switching, easy operation, small volume, light weight, few parts, least fluid resistance and good tightness.

Ball Valve scope of application

1. Suitable for medium with low temperature (≤150℃), high pressure and high viscosity;
2. Can not be used for flow regulation;For situations requiring quick opening and closing;
3. Usually, the ball valve is recommended to be used in the pipeline with two-position regulation, strict sealing performance, wear, shrinkage channel, rapid opening and closing action, high pressure cut-off (large pressure difference), low noise, gasification phenomenon, small operating torque and small fluid resistance;
4. Also suitable for light structure, low pressure cut-off, corrosive medium;

Ball Valve standard

API 6D/ISO 14313: Pipeline valves
API 608: Flanged, threaded and butt-welded end steel ball valves
- ISO 17292, Steel ball valves for the petroleum, petrochemical and refining industries
BS 5351: Steel ball valves
GB/T 12237: Flanged and butt-welded steel ball valves
DIN 3357: Ball valves
Shell SPE 77/100: Press BS5351 ball valve
Shell SPE 77/130: Flanged end and butt-welded end ball valves according to ISO14313