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What is Motor Operated Valve or Motorized Valves?
Motorized Valve or Motor Operated Valve (MOV) is an important item of Plant & Piping system. These valves are generally of wide size range and are used for different applications such as Pump discharge etc. Motor Operated.Valves are often called as On-Off valves as the motors serve the purpose of fully opening or fully closing valves in pipelines. For example, cooling water lines, process pipelines where controlling of fluid is not required, motor operated valves can be used to fully allow or fully stop the fluid flow. These valves are not used for throttling purposes as they serve mainly On-Off sice application.Motor operated valves can be of various types e.g. Gate/ Ball/ Butterfly etc. with actuator control. Design of Motors and valves can be different. An electric motor is mounted on the valve and geared to the valve stem so that when the motor operates the valve will open or close. For this MOV, motor operated with actuator control from local panel or, from control room is required. There is a requirement of co-ordination among Piping-Electrical-Instrumentation-Process engineers and vendor for design and procurement of such motor operated valves.
Applications of Motorized Valves
Motorised control valve / Motor operated valves are usually for full open and full close applications.
However there are places where they are used for position control as well.
Types of motor operated valves
Motorised control valve can be classified into three types. However it must be noted that the main application of motorised valves are for flow control and flow isolation.