Within the Apex Valve system, the actuator (if automated) serves as the automated driving mechanism that precisely controls the opening, closing, or modulation of the valve. It receives control signals (e.g., electrical, pneumatic, or hydraulic) and translates them into the mechanical force required to position the valve's internal components, such as the disc or plug, thereby regulating the flow of liquids, gases, or slurries through the pipeline. The actuator is a component part, typically mounted on the valve, and is available in configurations suited for various automation requirements. It is designed to operate with control signals such as 4-20 mA analog or digital (HART) commands, and can be powered by a 24 V DC supply (with other voltages on request). The actuator provides a torque range of 50-2000 N·m, selectable according to valve size, and achieves a stroke time of 15-60 seconds for 90° rotation. Positioning accuracy is ±0.5% of full stroke. The operating pressure range is 1.0-1.6 MPa, with a note that The actuator is designed for an ambient temperature range of -40 to 85 °C for the standard version, and enclosure protection is IP54-IP65 (per IEC 60529), with higher ratings on request. Materials on file include aluminum alloy, stainless steel, and engineering plastics. Body material options are WCB or CF8M (per ASTM A216/A351), with other alloys available. Weight ranges from 15-120 kg, depending on torque and options. All values are directory reference ranges and must be confirmed for the specific model and application with the legal manufacturer or supplier. The actuator is not a standalone product; it is an integral part of the valve assembly, and its selection depends on valve type, required torque, control signal, and environmental conditions.
The actuator operates by receiving an external control signal (e.g., 4-20 mA electrical current, 3-15 psi pneumatic pressure, or digital command). This signal energizes its internal mechanism—such as an electric motor, pneumatic piston, or hydraulic cylinder—which then generates linear or rotary motion. This motion is transferred via a stem or shaft to the valve's closure member, moving it to the desired position (open, closed, or throttled) to control flow. The actuator's control system compares the actual position with the commanded position and adjusts the output to achieve the required accuracy. The actuator may include feedback sensors for position monitoring and can be interfaced with control systems for remote operation. The working principle is based on converting the input signal into mechanical force, and the specific mechanism (electric, pneumatic, or hydraulic) determines the response time and torque characteristics. For the Apex Valve system, the actuator is designed to provide reliable and precise positioning under specified operating conditions, but the actual performance must be verified with the manufacturer for the specific model and application.
