乱人伦中文字幕-日本乱理伦片在线观看中文-色94色欧美sute亚洲线路二-久久成人亚洲香蕉草草-成人免费毛片网站-午夜亚洲国产-а天堂中文在线官网-麻豆人人妻人人妻人人片av-欧美亚洲精品真实在线-在线不卡国产-欧美精品网站-成人久久免费网站-911精品国产一区二区在线-成人做受视频试看120秒-91黄色看片

The vacuum gate valve is improved from the ordinary manual gate valve. The difference is that the packing seal of the vacuum gate valve is equipped with a vacuum seal ring, which has the function of self-expansion and compression.Better gas sealing performance than ordinary gate valves.When the vacuum gate valve is closed, the sealing surface can be sealed only by medium pressure, that is, the sealing surface can be sealed by medium pressure pressing the sealing surface of the gate to the other side of the seat to ensure the sealing surface, which is self-sealing.Most gate valves are forced to seal, that is, when the valve is closed, to rely on external force to force the gate plate to the seat, to ensure sealing surface sealing.

Product model: DKJ41H-25
Nominal size: DN15~150mm
Nominal pressure: PN4.0~10.0MPa
Main materials: 25, WCB, Cr5Mo
Design and Manufacture: GB/T12235, API
Flange dimensions: JB/T79, GB/T9113
Pressure and temperature: ASME B1 6.34, GB/T9131
Structure length: GB/T12221
Butt welding connection size: ASME B1 6.25, GB/T12224
Inspection and test: GB/T13927, JB/T9092