Q941H/Y electric hard seal ball valve

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>Product Introduction
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Introduction of Electric Hard Seal Ball Valve
Electric hard seal ball valve is suitable for two-position cutting and adjustment occasions. The connection between the valve and the actuator adopts a direct connection method and consists of a series of fine and small electric actuators (different types of electronic electric actuators or pneumatic piston actuators can also be configured according to user requirements) and ultra-short ball valves. The electric actuator has a built-in servo system, so there is no need for a separate servo amplifier. The operation can be controlled by inputting signals and power. Compared with ordinary electric ball valves, it has the characteristics of compact structure, small volume, light weight, close distance between the valve seat and the end flange, less material retention, and superior sealing performance.
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Electric hard-sealed ball valve
Working principle
The center line of the ball of the cam eccentric single valve seat is offset relative to the center line of the valve body, and the valve seat The sealing surface is eccentric. When the valve stem rotates clockwise around the point, the ball also rotates and closely matches the sealing surface of the valve seat. When the friction torque between the sealing pair and the friction torque between the packing and the valve stem are greater than the torque caused by the medium pressure, the valve will A reliable seal will be achieved. Since the valve seal adopts a cam-type eccentric structure, when the valve is opened, the ball quickly separates from the valve seat sealing surface. When the valve is closed, the ball quickly matches the sealing surface of the valve seat. This achieves the purpose of small opening torque and tight closing.
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Electric hard-sealed ball valve
Structural features
The body cavity space of small-diameter valves is narrow, and the usual structural design is no longer applicable. Therefore, the end of the valve stem is processed into a flat shape with a short shaft. There are flat grooves and holes on the upper and lower sides of the ball. The holes are used to connect the upper and lower valve stems to fix the ball, limit the degree of freedom of the ball, and at the same time balance the body cavity and pipelines. The effect of pressure between media. The flat groove cooperates with the valve stem to transmit the torque from the handle.
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Electric hard-seal ball valve
Manufacturing and processing
The coaxiality of the two holes of the ball and the eccentric size tolerance requirements of the center line of the ball relative to the center line of the valve body It is relatively strict and generally requires boring machine or CNC machine tool processing. Before assembly, the sealing surface of the valve seat and the sphere surface should be ground together, then place the sphere in the closed position, install the left valve body, adjust the gasket, and tighten the screws. If there is no leakage during static pressure irrigation, the valve can ensure sealing under the sealing test. .
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Technical parameters of electric hard-sealed ball valve
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Appearance drawing of electric hard-sealed ball valve