狠狠躁日日躁夜夜躁,在线一区二区三区在线一区,一级片久久久,国产乱xxxx国语对白,成人www在线观看,亚洲精品久久久久久久久,久久久久久久999,中文字幕一区二区在线观看

Home / Product

Product

High

High performance riser ball valve

Nominal pressure:PN0.4~1.6MPa
Nominal diameter:DN25~100mm

High performance riser ball valve is the latest product developed on the basis of the introduction of Germany through the wall entry pipe safety fire ball valve technology. It is mainly used for cutting off the medium in emergency or normal maintenance.


Reliable seal construction

The ball and PTFE seat form a primary seal under the action of a disc spring, and the back of the seat is provided with an O-ring to help seal. Once the PTFE seat is burned, the ball forms a metal seal with the body under the force of the spring.


Operating structure for anti-theft

The special shape opening and closing mechanism is hidden in the upper part of the valve body, and the special wrench can be operated; The top protective cover prevents rain and other debris, to achieve the purpose of special management and safe gas use.


Low operation twist

A specially designed slotted disc spring with a radial ring provides the valve seal force, resulting in extremely low opening and closing torque compared to conventional ball valves.


Valve stem structure

The inverted valve is blown out by the pressure in the cavity to avoid safety hazards; Two self-tightening O-rings ensure stem seal.


Antistatic structure

After the disc spring compression, the ball and the valve body form a conduction road, the valve in the process of opening and closing the static electricity generated.


External anticorrosion

Cathodic electrophoretic coating is used to prevent the valve from oxidizing and rusting effectively and prolong its life.

主站蜘蛛池模板: 日本少妇高潮xxxxⅹ| 国产99久久九九精品免费| 少妇高潮一区二区三区99小说| 日韩欧美亚洲视频| 国产婷婷一区二区三区久久| 国产偷窥片| 国产精品综合久久| 99精品在免费线偷拍| 国产午夜精品一区二区三区四区| 日本边做饭边被躁bd在线看| 日韩中文字幕亚洲欧美| 大bbw大bbw超大bbw| av午夜电影| 久久99精| 91久久国产露脸精品| 欧美视频1区| 日韩毛片一区| 亚洲第一天堂无码专区| 亚洲欧美另类国产| 欧美髙清性xxxxhdvid| 丰满少妇在线播放bd日韩电影| 亚洲精品日韩精品| 久久久精品欧美一区二区| 午夜叫声理论片人人影院| 中文字幕一区二区三区又粗| 日本aⅴ精品一区二区三区日| 亚洲麻豆一区| 欧美一区二区三区久久久久久桃花| 久久久久亚洲精品视频| 欧美三级午夜理伦三级中视频| 欧美精品国产精品| 伊人久久婷婷色综合98网| 国产国产精品久久久久| 国产精品欧美日韩在线| 欧美精品国产一区| 日韩久久精品一区二区三区| 日韩美一区二区三区| 91精品一二区| 国产一区在线视频观看| 88888888国产一区二区| 午夜毛片在线观看| 国产日韩欧美一区二区在线观看 | 国产一区二三| 在线观看v国产乱人精品一区二区| ass美女的沟沟pics| 在线国产91| 91在线一区二区| 亚洲自偷精品视频自拍| www.日本一区| 国产婷婷色一区二区三区在线| 亚洲四区在线| 欧美三区二区一区| 99久久免费毛片基地| 狠狠躁夜夜躁人人爽天天天天97| 国产一区免费在线| 欧洲在线一区| 亚洲精品日韩在线| 国产精品免费专区| 国产麻豆91欧美一区二区| 国产亚洲精品久久久久久网站| 国偷自产一区二区三区在线观看| 国产一区二区91| 欧美日韩一区二区三区四区五区| 精品国产乱码久久久久久图片| 亚洲欧洲日韩av| 在线观看欧美一区二区三区| 99热一区二区| 欧美日韩国产在线一区| 午夜理伦影院| 91久久精品国产亚洲a∨麻豆| 蜜臀久久精品久久久用户群体| 高清国产一区二区 | 午夜一区二区视频| 亚洲一二三在线| 国产精品久久久久久久妇女| 国产精品一区久久人人爽| 狠狠色噜噜狠狠狠888奇米| 91精品一区二区在线观看| 精品99免费视频| 国产品久精国精产拍| 国产精品自拍不卡| 久免费看少妇高潮a级特黄按摩|