Скачать с ютуб How Valve Positioner Works | Hook's Law в хорошем качестве

How Valve Positioner Works | Hook's Law

( 🔴 ) Link to FREE Udemy Course for I&C Professionals 1500+ Engineers have taken the Course (Engineers have said it is even BETTER than the PAID Courses available) Give it a Try 😊 Link 👉 https://asad-shaikh-instrumentation.c... (🔴) Link to E-Book on Control Valve Mastery 👉 https://www.asad-shaikh.com/control-v... What is a Control Valve Positioner? In industrial processes, control valves play a crucial role in regulating fluid flow, pressure, and temperature. However, to achieve precise control, a control valve positioner is often necessary. A positioner is a device that accurately controls the movement of a control valve, ensuring it reaches the desired position in response to a control signal. Working Principle of Control Valve Positioners The working principle of a control valve positioner is based on a feedback control loop. The positioner receives a control signal from a controller or PLC, which compares the desired valve position with the actual position. If there's a deviation, the positioner adjusts the valve's movement to match the desired position. This process occurs continuously, ensuring the valve remains at the correct position. Types of Control Valve Positioners There are two primary types of control valve positioners: 1. Pneumatic Positioners: Use compressed air to move the valve stem. 2. Electric Positioners: Use an electric motor to move the valve stem. How Positioners Improve Valve Performance Control valve positioners enhance valve performance in several ways: 1. Accurate Control: Positioners ensure the valve reaches the desired position, reducing errors and improving process control. 2. Increased Precision: Positioners can achieve precision of ±1% or better, depending on the application. 3. Faster Response Times: Positioners respond quickly to changes in the control signal, reducing process upsets. Benefits of Using Control Valve Positioners The benefits of using control valve positioners include: 1. Improved Process Control: Accurate control of valve movement ensures consistent process conditions. 2. Increased Efficiency: Reduced errors and faster response times lead to improved process efficiency. 3. Extended Valve Life: Positioners reduce wear and tear on valves, extending their lifespan