A motor operated valve (MOV) is a type of valve that is automatically operated by an electric motor. The motor is coupled to the valve stem through a set of gears, which allows the motor to open, close, or adjust the valve position based on control signals. MOVs are widely used in various industrial applications where remote or automated valve control is required.
Key features and benefits of motor operated valves:
- Remote operation: MOVs can be controlled remotely from a control room or through an automated control system, eliminating the need for manual operation at the valve location.
- Precise control: The electric motor and gear assembly allow for precise positioning of the valve, enabling accurate flow control and regulation.
- Fail-safe operation: Many MOVs are designed with fail-safe features, such as spring-return or battery backup, to ensure that the valve moves to a predetermined safe position in the event of a power failure or control system malfunction.
- Torque limiting: MOVs often incorporate torque limiting devices to prevent damage to the valve or actuator due to excessive force during operation.
- Position indication: MOVs can be equipped with position indicators, such as limit switches or potentiometers, to provide feedback on the valve's actual position to the control system.
- Versatile valve types: Motor operators can be adapted to various valve types, including gate valves, globe valves, ball valves, and butterfly valves, depending on the application requirements.
Motor operated valves are used in a wide range of applications, including:
- Power plants (nuclear, fossil fuel, and hydroelectric)
- Oil and gas pipelines
- Water and wastewater treatment plants
- Chemical and petrochemical processing plants
- HVAC systems
- Irrigation systems
- Fire protection systems
Their ability to provide remote, automated, and precise valve control makes them essential components in many industrial processes where reliable and efficient valve operation is critical.