Chongqing Exhibition kun pipeline valve distributor, agent all kinds of valves: Y-strainer, globe valve, gate valve, table before the valves, check valves, butterfly valves, steam traps, rubber lined diaphragm valves, ball valves ...... 24 hours Toll Free: 15213217807 (Li) Official Website: www.zhankunguandao.com Chongqing, also known as cut-off valve gate valve, the valve is forced closed, so the valve is closed, the valve must exert pressure to force the sealing surface does not leak. When the medium from the bottom valve into the valve, the operating force required to overcome the resistance of the stem and packing friction and pressure generated by the medium thrust power than the valve off the valve opening force, so that the stem The diameter should be large, otherwise it will happen bend the stem top failure. Divided into three types according to connection: flanged, threaded connection, welding connection. From the emergence of a self-sealing valve, globe valve is replaced by medium flow valve on the top into the valve chamber, then in the medium under pressure, off valve is small, while the force to open the valve, the valve stem diameter can be appropriate reduced. Meanwhile, under the action of the medium, this form of valve is also more tightly. China's valve "three to" has been specified, the flow valve, all top-down. This valve should be installed horizontally valve opens, the valve opening height for nominal diameter from 25% to 30%. Flow has reached the maximum, which means that the valve has reached the fully open position. So shutoff valve fully open position, valve stroke should be determined. Chongqing PE shut-off valve Model: diameter 20mm-110mm features: compression capability, high temperature resistance, corrosion resistance; Chongqing valve, also called cut-off doors, is the most widely used threaded globe valve valve illustrated one, it's So popular is due to the opening and closing process between the sealing surface friction is small, more durable, opening height is not easy to manufacture, easy maintenance, not only for low-voltage, and suitable for high pressure. Valve closure principle is: to rely on bar pressure valve allows the valve seat sealing surface sealing surface and fit closely to prevent medium flow. Valve medium only allowed one-way flow, install directional. Valve structure length is greater than the valve, and fluid resistance, long-term operation, the sealing reliability is not strong. 24 hours Toll Free: 15213217807 (Li) Official Website: www.zhankunguandao.com Chongqing valves For more product information, please contact: Company Name: Chongqing Exhibition kun Technology Co., Ltd. ADD Warehouse: Chongqing Jiulongpo go Guanghua Electrical City 1-32 Tel :023 -81,996,669; 15123295084 (Li)