The definition of gate valve

Gate is one of the commonly used block valves, is mainly used to connect or truncation pipeline medium, does not apply to adjust the medium flow. Gate valves are suitable for pressure, temperature and diameter range is very large, especially suitable for medium and large diameter pipeline. Gate valve is used as a cut-off media, through the entire circulation when fully open, the medium run minimal pressure loss. Gate valves are normally applied to don't need to often open/close, and keep the gate full open or full close condition. Is not suitable for use as regulating or throttling. For the high-speed flow medium, ram in local open conditions can cause the vibration of the gate, and vibration and possible damage of disc and seat sealing surface, and the throttling can make gate medium of erosion. From the structure form, the main difference is adopted in the form of packing element. According to the form of sealing element, often the gate valve is divided into several different types, such as: parallel double parallel wedge gate valve, gate valve, gate valve, wedge double disc brake, etc. The most common form is wedge gate valve and parallel gate valve.