Hydraulic Ball Valve Factories Introduces The Process Of Using Ball Valves

The ball valve uses a handle or related driving device to apply a certain torque to the upper end of the valve stem so that the ball rotates 90 degrees to complete the fully open or fully closed action. When the ball valve is opened or closed, the ball rotates with the valve stem. The opening of the ball valve is a process of gradually increasing or decreasing. Therefore, the valve body flow channel of the ball valve is a constricted section when it is opened and closed. During the opening and closing process of the ball valve, with the opening

When the fluid flows through the valve, a certain pressure difference is generated on both sides of the valve, and the size of the pressure difference changes with the change of the opening degree. Based on the principle of conservation of energy, as the fluid approaches the valve, in order for the fluid to pass through the valve, the velocity of the fluid increases. Instead, there is a corresponding decrease in pressure, which is inversely proportional to velocity.

Hydraulic Ball Valve Factories Introduction When the upstream flow rate of the ball valve is constant, the flow rate increases with the increase of the pressure difference. Flow velocity and pressure occur downstream of the narrow neck (ie, the constriction). When the ball valve is opened and closed, the fluid flowing through the valve is equivalent to flowing through the contraction section. The contraction section is not in the contraction section, but a distance downstream of the contraction section, which changes with the pressure. systolic velocity, the flow area of ​​the logistics layer, and the fluid pressure.

During the opening and closing operation of the high-pressure ball valve, especially in the early and late stages of opening and closing, there is a large pressure difference on both sides of the valve due to the small opening of the valve. Large pressure differentials bring high flow rates to the fluid. When the fluid passes through the valve at high speed, turbulence, flashing, and cavitation will occur in the fluid. During liquid operation, when the high-pressure fluid passes through the valve in the form of turbulent flow, due to the valve disc, The influence of obstacles, such as valve plates or other closing elements, can create pressure fluctuations that cause the valve to vibrate.