国产午夜福利短视频-国产精品刘玥久久一区-亚洲无线一二三四区手机-国产网站视频-成人av黄色-欧美城天堂网址-性色蜜桃臀x66av-免费无码观看的av在线播放-久久国产精品成人片免费-天天噜噜噜噜噜噜-中文不卡视频-人人妻人人爽人人狠狠-四虎成人久久精品无码-久草视频免费看-久久视精品

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