Principles And Advantages Of Plastic Ball Valves


    The plastic ball valve has a simple structure, consisting of only a few parts, and saves material consumption; small size, light weight, small installation size, small driving torque, simple and rapid operation, only need to rotate 90° to quickly open and close; and At the same time, it has good flow regulation function and closing and sealing characteristics. In the application field of large and medium caliber, medium and low pressure, plastic ball valve is the dominant valve form. When the ball valve is in the fully open position, the thickness of the butterfly plate is the resistance when the medium flows through the valve body, so the pressure drop generated by the valve is small, so it has better flow control characteristics. The ball valve has two sealing types: elastic seal and metal seal. Elastic sealing valve, the sealing ring can be embedded in the valve body or attached to the periphery of the butterfly plate. Valves with metal seals generally have a longer life than valves with elastic seals, but it is difficult to achieve a complete seal. Metal seals can adapt to higher operating temperatures, while elastic seals have the defect of being limited by temperature. If the ball valve is required to be used as a flow control, the main thing is to correctly select the size and type of the valve. The structural principle of the ball valve is especially suitable for making large-diameter valves. Ball valves are not only widely used in general industries such as petroleum, gas, chemical, and water treatment, but also used in cooling water systems of thermal power stations. Commonly used ball valves include wafer butterfly valves and flanged butterfly valves. Wafer type ball valves are connected between two pipe flanges with stud bolts. Flange type ball valves are equipped with flanges on the valve, and the flanges on both ends of the valve are connected to the pipe flanges with bolts. The strength performance of the valve refers to the ability of the valve to withstand the pressure of the medium. The valve is a mechanical product that bears internal pressure, so it must have sufficient strength and rigidity to ensure long-term use without cracking or deformation.
    In addition, our company also produces related accessories, such as pp compression fittings, in addition to pipe fittings. If you need it, welcome your consultation and purchase!