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Latches are one of the main types of shut-off valves used in pipeline systems to completely cover the flow of the working medium. Understanding the differences between the retractable and non-retractable spindle, as well as the features of the seal, allows you to choose and effectively use the latches in different conditions. Latch seal In the process of operation of the latches, elements such as sealing and spindle play an important role. The gate can be flat or wedge-shaped, depending on the design.

ШпиндельSpindle : Connects the gate to the drive and Що таке гідроудар у трубопроводі. Як його уникнути? (https://admiralzavod.ua.market) ensures its movement. КорпусBody: Made of various materials such as cast iron, steel or stainless steel. The case provides protection of internal elements and connection to the pipeline. Sider (wedge): The main shut-off element that moves up and down, closing or opening the pipeline cross-section. The spindle can be retractable or retractable, depending on the type of latch. Seal: Provide tightness of connections between the gate and the body.

Seals can be made of various materials, including rubber, Teflon and metal. ПривідDrive : The mechanism that moves the gate. Drives can be manual (flywheel), electric, pneumatic or hydraulic. Design and principle of operation: In latches with a non-retractable spindle, the spindle rotates in place, and the locking element rises and descends along the guides inside the housing. The spindle remains fixed in an upright position, regardless of the lattice's state.

Advantages: КомпактністьCompactness: Latches with a retractable spindle take up less space, which is especially important in limited spaces. Simplicity of the design: A smaller number of moving elements reduces the likelihood of mechanical malfunctions and simplifies installation. Disadvantages: Lack of visual control : Determine the condition of the latch (open or closed) can only be by indicators or special marks on the drive.

Wear and corrosion: Spindle is in constant contact with the working environment, which can lead to its rapid wear and corrosion, especially when working with aggressive environments. Sudden valve closure: When the valve or latch closes too quickly, the kinetic energy of the moving fluid is converted into a pressure that causes a hydroelectric shock. Quick shutdown of the pump: A sharp shutdown of the pump causes an instantaneous pressure reduction, which can lead to a reverse flow and shock wave.

The presence of air in the system: Air bubbles can suddenly shrink or expand, causing pressure jumps. Change the flow direction: Sudden changes in the direction of the flow, for example, when starting or stopping the pump, can also lead to a hydroelectric shock.