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  • Overview and application of pneumatic expansion butterfly valves
    • Mar , 19 2024

    The working principle of pneumatic expansion butterfly valve is to rely on compressed air provided by the air source to cause elastic deformation of the sealing pair inside the valve body, thereby achieving switch control. After the gas source enters the valve body, it is compressed to a certain pressure through a compressor and then sent into the cylinder, causing the piston to move left or right...

  • Basic knowledge of pneumatic valve control accessories
    • Mar , 19 2024

    Pneumatic valve is a type of valve driven by compressed air, which has the advantages of high efficiency, safety, and environmental protection, and is widely used in industrial automation control systems. Pneumatic valves consist of three parts: pneumatic actuator, control accessories, and valve body. The pneumatic actuator is the part that realizes the opening and closing action of the valve, whi...

  • Hardening method of metal hard sealed ball valve balls and valve seats
    • Mar , 14 2024

    At present, the commonly used hardening processes for the surface of metal hard sealed ball valves mainly include the following: (1) Surface welding (or spray welding) of hard alloy on the sphere can achieve a hardness of over 40HRC. The process of surface welding of hard alloy on the sphere is complex, with low production efficiency, and large area welding can easily cause deformation of the part...

  • What is a ball valve? What is the function of a ball valve?
    • Mar , 12 2024

    Ball valve is a common type of valve, and its design characteristics make it widely used in various industrial applications. Ball valves are favored for their simplicity, reliability, and ease of operation, playing an important role in fluid control. The main components of a ball valve include a sphere with a diameter and inlet and outlet pipes located on both sides of the sphere. Spheres are usua...

  • Centrifugal pump foundation: mechanical seals for internal and external flushing
    • Mar , 12 2024

    The evolution from packing seal to mechanical seal: The pump impeller is installed on the pump shaft that passes through the pump casing or volute. If there is no pump seal, the hollow "damp" part of the shaft entering the volute will become the source of continuous leakage. Over a hundred years ago, most pumps relied on packing to prevent pump leakage while allowing the shaft to rotate freely. Th...

  • Does the shut-off valve have directionality? Why install in the direction?
    • Mar , 07 2024

    Globe valve, also known as shut-off valve, belongs to the forced sealing type valve and is a type of shut-off valve. There are three types of connection methods: flange connection, threaded connection, and welded connection. The "Three Modernizations" of valves in our country once stipulated that the flow direction of globe valves should be from top to bottom, so there is directionality during ins...

  • Working principle of pneumatic solenoid valve
    • Mar , 07 2024

    Electromagnetic valves are automation basic components used to control fluids and belong to actuators; Not limited to hydraulic, pneumatic. Electromagnetic valves are used to control the direction of hydraulic flow, and mechanical devices in factories are generally controlled by hydraulic steel, so electromagnetic valves are used. The working principle of an electromagnetic valve is that there is ...

  • Valve sealing level and selection
    • Mar , 05 2024

    Valves are important components in the pipeline system of petrochemical plants, with a wide variety and large quantity, and are one of the main sources of leakage in the plant. Therefore, the requirements for valve leakage are crucial. The sealing performance of a valve refers to the ability of each sealing part of the valve to prevent medium leakage. The main sealing parts of a valve include the ...

  • What is the principle of a shut-off valve
    • Mar , 05 2024

    1、 What is the principle of a shut-off valve? A globe valve uses the torque of the valve stem to exert downward pressure on the sealing surface, relying on the pressure of the valve stem to tightly fit the sealing surface of the valve disc and the sealing surface of the valve seat, preventing the flow of medium or regulating the flow rate of medium. 2、 What is the scope of application of globe val...

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