{"id":6621,"date":"2026-04-09T16:19:00","date_gmt":"2026-04-09T13:19:00","guid":{"rendered":"https:\/\/ukspar.ua\/?p=6621"},"modified":"2026-05-14T16:26:08","modified_gmt":"2026-05-14T13:26:08","slug":"elektroprivid-dlya-zasuvki-yak-vibrati-pravilno","status":"publish","type":"post","link":"https:\/\/ukspar.ua\/en\/blog\/elektroprivid-dlya-zasuvki-yak-vibrati-pravilno\/","title":{"rendered":"Electric actuator for a latch: how to choose the right one"},"content":{"rendered":"

Modern industrial pipeline systems require reliable and automated control of shut-off valves. Electric latch<\/a> \u2014 is the optimal solution for facilities where it is necessary to remotely or automatically control the flow of liquid or gas.<\/p>\n\n\n\n

The correct choice of an electric actuator for a latch directly affects the reliability of the entire system, the duration of its trouble-free operation and operating costs. In this article, we will consider what an electric actuator for a latch is, where it is used, what types there are and how to correctly approach the selection of an electric actuator for a latch.<\/p>\n\n\n

What is an electric actuator for a latch and how does it work?<\/h2>\n\n\n

An electric actuator is a device that converts electrical energy into mechanical motion and transmits torque to the spindle or shaft of a valve to open or close it. It is installed on the valve instead of a handwheel and provides automation of the control process. In essence, an electric actuator for a valve consists of an electric motor, a gearbox and a control system, which together control the flow of the medium in the pipeline.<\/p>\n\n\n\n

The principle of operation is as follows: the electric motor, having received a command signal, transmits rotation through the gearbox to the output shaft. The latter, in turn, is connected to the valve spindle through standard connecting elements. The gearbox reduces the rotation speed and increases the torque, which allows opening and closing valves of large diameters even at significant operating pressure.<\/p>\n\n\n\n

Most modern electric drives are equipped with built-in limit switches that automatically stop the motor in the extreme positions - "fully open" and "fully closed", as well as torque switches for overload protection.<\/p>\n\n\n

Where are electric valves used?<\/h2>\n\n\n

The electrically operated gate valve is used extremely widely in industry - wherever manual control of the shut-off valve is inconvenient, dangerous or impossible. The main areas of application are as follows:<\/p>\n\n\n\n

    \n
  • An automated electric gate actuator allows you to remotely control gates at pumping stations, treatment plants, and water mains without the presence of an operator directly at the facility.<\/li>\n\n\n\n
  • Electric valves operate in hydrocarbon and aggressive chemical transportation systems where manual operation is associated with risk to personnel and a reliable shut-off pipeline element is critically important.<\/li>\n\n\n\n
  • Electric drives provide control automation at heat stations, boiler rooms, and power plants, where quick switching of coolant flows is required.<\/li>\n<\/ul>\n\n\n\n

    The industrial electric drive is also used in metallurgy, mining, and food processing industries.<\/p>\n\n\n

    Types of electric actuators for shut-off valves<\/h2>\n\n\n

    Before you start choosing an electric actuator for a gate valve, it is important to understand what types of actuators exist. They are classified by the nature of the output movement:<\/p>\n\n\n\n

      \n
    • Multi-turn actuators are the most common type for valves. The output shaft makes several complete revolutions from the initial to the final position. This actuator is compatible with wedge, parallel and slide valves, where the spindle is moved by rotation.<\/li>\n\n\n\n
    • A single-turn (quarter-turn) electric actuator is designed for ball valves, butterfly valves, and butterfly valves, where a 90\u00b0 turn is sufficient. This type is not suitable for classic gate valves - it is more relevant for other types of shut-off valves.<\/li>\n\n\n\n
    • Linear (transitional) drive - provides rectilinear movement of the stem. It is used less often, mainly for valves with a non-returnable spindle, where the thread of the travel nut is implemented outside the valve body.<\/li>\n<\/ul>\n\n\n\n

      For most industrial valves on pipelines, a reliable multi-turn electric actuator is chosen, as it provides smooth, controlled movement of the valve and can transmit torque over a wide range of values.<\/p>\n\n\n

      Basic parameters for selecting an electric actuator for a latch<\/h2>\n\n\n

      Competent selection of an electric actuator for a valve is impossible without analyzing the technical parameters of the valve itself and its operating conditions.<\/p>\n\n\n\n

      Key characteristics to be determined:<\/p>\n\n\n\n

        \n
      • Torque. This is the main parameter when selecting. The required torque depends on the type and diameter of the valve, the operating pressure, the type of transported medium and the condition of the seals. Valve manufacturers usually indicate the minimum required torque for opening\/closing. For reliable operation, it is recommended to choose an electric actuator with a torque margin of 30 % above the minimum required.<\/li>\n\n\n\n
      • DN diameter (conditional passage). The larger the DN diameter of the pipeline, the larger the gate area - and the higher the torque required for control.<\/li>\n\n\n\n
      • System pressure. The operating pressure directly affects the force required to move the valve. When selecting, take into account the nominal pressure PN and the maximum possible pressure drop across the valve at the moment of opening or closing.<\/li>\n\n\n\n
      • Type of latch and spindle design. There are two types of latches: with a retractable spindle (the spindle rises when opened) and with a non-retractable one (the spindle rotates without axial movement). A retractable spindle requires a drive with a lead screw nut or a special adapter that compensates for axial movement. A non-retractable one requires a standard output shaft.<\/li>\n\n\n\n
      • The number of revolutions of the output shaft. This parameter is determined by the spindle thread pitch and the full stroke of the valve. The actuator must provide exactly as many revolutions as are required to fully open or close the valve.<\/li>\n\n\n\n
      • Control and power supply system. Standard power supply \u2014 380 V \/ 50 Hz three-phase current for industrial drives or 220 V single-phase for less powerful ones. The control type can be local (push-button station on the drive), remote (4\u201320 mA, 0\u201310 V signal or discrete inputs) or integrated into ACS TP systems via Modbus, PROFIBUS, HART protocols, etc.<\/li>\n<\/ul>\n\n\n

        How to choose the right electric actuator for the type of latch<\/h2>\n\n\n

        Selecting an electric actuator for a gate valve is a step-by-step process that takes into account the combination of valve parameters and operating conditions. Let's consider the algorithm for selecting an electric actuator for a gate valve in more detail:<\/p>\n\n\n\n

          \n
        1. Determine the type and characteristics of the valve: diameter DN, nominal pressure PN, spindle type (retractable \/ non-retractable), seal material and characteristics of the transported medium.<\/li>\n\n\n\n
        2. Determine the required torque. If the valve data sheet does not specify the torque, it can be calculated using industry methods or by contacting the supplier's technical department.<\/li>\n\n\n\n
        3. Determine the number of revolutions required for full stroke. To do this, divide the full stroke of the rod (in mm) by the spindle thread pitch. How to choose the right electric actuator for a latch is to choose a model whose revolution range covers the obtained value.<\/li>\n\n\n\n
        4. Check the compatibility of the connecting elements. The ISO 5210 standard specifies the standard dimensions of flange connections and the shape of the output shaft (from F03 to F40 and above). It is necessary to ensure that the connecting flange of the actuator matches the valve cover.<\/li>\n\n\n\n
        5. Select the type of control. If the valve operates in an automated control system, choose an actuator with a standard analog or digital interface that is compatible with your SCADA or PLC. For stand-alone facilities, simple remote control via cable lines is sufficient.<\/li>\n\n\n\n
        6. Consider the environmental conditions. The degree of protection of the drive housing (IP) must correspond to the installation conditions: for wet rooms and open areas - not lower than IP67, for explosive areas - with appropriate explosion protection (Ex).<\/li>\n<\/ol>\n\n\n

          What to look for when choosing an electric drive<\/h2>\n\n\n

          It is also worth dwelling on practical nuances that are often overlooked when purchasing equipment:<\/p>\n\n\n\n

            \n
          • A reliable electric actuator should have a built-in manual control mechanism (handwheel or handle) for emergency resetting of the valve to the desired position in the event of a power outage. This is a must for critical pipeline systems.<\/li>\n\n\n\n
          • An industrial electric drive must have a torque switch that protects both the valve and the drive itself from damage if the valve gets stuck or a foreign object gets in. The lack of such protection is a direct cause of premature equipment failure.<\/li>\n\n\n\n
          • Electric actuators are available for short-time (S2) and repeated short-time (S4) operating modes. For frequently switched valves, it is necessary to choose a model with the appropriate mode to avoid motor overheating.<\/li>\n\n\n\n
          • A standard automated electric drive for water supply and industrial facilities must have a declaration of conformity, passport and quality certificate. Check whether the selected drive meets the requirements of current technical regulations.<\/li>\n\n\n\n
          • Choose a supplier that offers not only the products themselves, but also technical support for selection, setup, and warranty service. This is especially important for complex facilities where the electric actuator for the latch operates in a complex automation system.<\/li>\n<\/ul>\n\n\n\n

            Proper selection of an electric actuator for a gate valve is a complex technical task. A properly selected industrial electric actuator allows for remote control of entire process lines, ensures uninterrupted operation of pipeline systems, and significantly reduces the cost of maintaining the shut-off valve throughout its entire service life.<\/p>","protected":false},"excerpt":{"rendered":"

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