An Overview of Motorized Valve


A valve that is driven by an electric motor is called a motorized valve. The motorized valves are ideal for large valves or to control remotely like agricultural irrigation, aircraft deicing, and automated fire suppression. The electric motor can be suited from linear type valves like gate valves to rotary motioned valves like ball valves and butterfly valves. There are no significant differences between motorized valves and manual valves in terms of their internal components; only the inputs that control valve operation differ.

Valves play a crucial role in fluid flow systems whether it is the garden hose or hydroelectric power generation systems. When the valves are too large and require so much torque to operate, or valves are present in remote areas, inaccessible locations,  or need to operate periodically when plants or factories are unmanned. To counter these problems motorized valves are used. The motorized valves work on the same principle as manual valves. The main and only difference is their operating system. The manual valves require an operator to operate them by the hand lever or gear wheel. While the motorized valves have an electrical actuator, that operates the valve easily by the electricity. The motorized valves can be opened or closed remotely or by an automated system.

Motorized valves are run on an advanced mechanism based on an electric motor that is connected to a gear shaft to open or close them. The particular advanced mechanism relies on the type of valve. The linear motion control valves like gate valves and globe valves use a lead screw mechanism that moves the barrier up and down. It is the best for larger systems like water mains.

Quarter-turn or rotary motorized valves are for quick action. They need just a 90- degree rotation to change their position from open to closed or closed to open. There is a central spindle advance mechanism used in this type of valve. These valves are the most reliable motorized valve types like motorized ball valves and motorized butterfly valves. This type of valve is not suitable for flow control or throttling application but performs best for sealing characteristics. These valves are commonly used in high-pressure fuel lines and on aircraft deicing systems.

The motorized valve components are the same as the manual valves of the same type. The only difference between them is the inclusion of a motor and a gear train assembly. The motorized valve mechanism is secured from advancing too far by using a set of electrical limits that cut off the motor supply when a valve is fully open or closed. When the valve needs to come into action again like close to open or open to close, the motor’s direction is simply reversed to move the valve in opposite direction.

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