Electric ball valves, electric valve, electric gate valves use and comparison: 1. Electric valve electric ball valve is evolved by the cock valve. It specific the same action rotated 90 degrees, different is the cock body is ball, a round hole or channel its axis. Spherical and opening ratio should be such, that is when the ball rotate 90 degrees, in the inlet and outlet should be completely present spherical, thereby blocking flow. Ball valve just has to rotate 90 degrees operation and small rotational torque can be closed tight. Full equality of the valve body cavity for medium resistance is very small, straight flow channel. Usually do think most suitable direct ball valve open and close, but recent development has put a ball valve designed to make it with throttling and control flow. Ball valve itself is the main characteristics of compact structure, easy operation and maintenance, and is applicable to water, solvent, acid and gas, such as general work medium, but also is suitable for the working conditions of media, such as oxygen, hydrogen peroxide, methane and ethylene. Ball valve body can be a whole, also can be combined. 2. Electric valve electric cut-off valve and valve stem and valve seat sealing surface vertical axes. Open or close the valve stem travel relatively short, and very reliable cutting action, makes this valve very suitable for used as medium cut off or mediation and throttling. Cut-off valve disc once in an open state, the seat and disc once in an open position, it is no longer the contact between the seat and clapper sealing surfaces, and have a very reliable cutting action, close to the valve is very suitable for used as medium cut or adjust and throttling. Once stop valve is fully open, it will no longer have a contact between the seat and clapper sealing surfaces, and thus its sealing surface mechanical wear and tear is small, because most of the cut-off Industrial Valves seat and valve disc is easy to repair or replace the whole valve sealing components without removed from the pipeline, for the valve and pipeline welding, it is very suitable for as a body of occasions. Flow direction of medium through the valve changed, so stop Industrial Valves flow resistance was higher than that of other valves. 3. Electric valve electric 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. In addition, the manual valve is the most basic driving mode of the valve. It includes using the handwheel, handle or wrench driven directly and through the transmission mechanism for driving two kinds. When the valve is rev torque is bigger, can be driven by gear or turbine drive, to achieve the purpose of ellipsis. Gear transmission points straight tooth cylindrical gear and taper gear transmission. Gears reduction ratio is small, be applicable to the gate and globe valves, turbine drive reducer is larger, apply to cock and ball valve.
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