Vice-valve installed in the main valve side or both sides of the flap valve and the screw connection, the normal flow of media, the valve is opened, the medium pressure valve is opened by the Deputy, the medium through the valve hole into the main Double Door Check Valves, Air Cushion valve, Vice export side, so that the main valve inlet end of relief, the main valve valve flap to open, the main valve before and after the pressure balance; medium counter-current, the main valve valve valve in the counterflow medium under the action of fast closed, and the deputy valve body upper part of the buffer tank, the Deputy valve valve cap screwed the upper part of his body covered with a small hole, the Deputy valve valve valve with the piston rod sets have a certain air gap between the piston and the buffer cylinder with rubber O-ring seal, the piston and the valve flap between the lower-dimensional seal; as Vice-valve With the main valve valve valve valve valve was closed, because of Vice-valve valve cover the role of holes, the medium gradually flows through the small hole on the Vice-valve cylinder cushion cavity, part of the media, through the Deputy valve valve flap and the gap between the piston rod reflux, it is slow, Vice valve piston closed.
副阀安 装在主阀阀瓣下侧或两侧且用螺纹联接，介质正常流动阀门开启时，介质压力将副阀打开，介质通过副阀小孔流入主阀出口端，使主阀进水口端卸压，主阀阀瓣开启，主阀前后压力趋于平衡；介质逆流时，主阀阀瓣在逆流介质作用下快速关闭，而副阀阀体上部为缓冲缸，副阀阀盖旋入阀体上部其盖上有一小孔，副阀阀瓣与其活塞杆空套有一定间隙，活塞与缓冲缸之间采用O型橡胶圈密封，活塞下部与阀瓣之间为平面密封；当副阀阀瓣随主阀阀瓣关闭而关闭时，因副阀阀盖小孔的作用，介质通过小孔逐渐流入副阀缓冲缸上腔体，一部分介质通过副阀阀瓣与活塞杆之间的间隙倒流，故副阀活塞是缓慢关闭的。
Commonly used products: Brass wire, including zinc line, polishing lines, filters, ion exchange resins, conductive block, wire mold, insulation board, guide pulley, bearings, water spray nozzles, descaling agent K200, KC12, eye discharge mode discharge brass, discharge chucks, belts as well as a strong magnet, clamp, charge plates, screws, etc. have the cash, and other great products: Tension brushless motor, sets up nose snakes belly, auxiliary sprinkler head, cluster-type sprinkler head Block, Block, and the mother spray, sprinkler head connected·, sprinkler head covered by panels, round round of vice-axis spindle, folder line wheels, power wheels, flow meter, electric plate fixed to the pad, round round, wire wheels, gears, axle win hearts catheter, vertical meter cable, pole lines, grounding line, guide line wheels, micro switch, on the nose, eyes mold base, the wheel seat, rectifier ring, nose mounting insulation, automatic threading catheters, eye mold base assembly, pressure gauge and chuck ER group, eyes fixed mold plate and so have the cash or stock.
常用产品：黄铜线、包锌线、抛光线、过滤器、离子交换树脂、导电块、导丝模、绝缘板、导轮、轴承、喷水嘴、除锈剂K200、KC12、放电眼模、放电铜管、放电夹头、皮带以及强力磁石、夹具、押板、螺丝等均有现货，其他非常用产品：张力马达碳刷、上机头蛇腹套、辅助喷水头、子母型喷水头喷座和母座、喷水头连接铜环、喷水头盖板、出线轮主轴副轴、夹线轮、强力轮、流量计、给电板固定垫、出线轮、引线轮、齿轮、出线轮轴心、导管、垂直度计连接线、极间线、接地线、引导线轮、微动开关、上机头、眼模座、滚轮座、整流环、机头绝缘固定座、、自动穿线导管、眼模座总成、压力表以及ER夹头组、眼模固定板等有现货或备货。