Electric Valve Actuator
Overview for Electric Valve Actuator
An electric actuator or to be more precise an electric valve actuator, is a machine that converts electrical energy into rotary torque which is used to drive a valve.
Typically an electrical actuator consists of an electric motor or motors, which produce low torque at high speed. Connected to a gearbox, the speed is slowed and as it does, the torque increases. At the electric actuator’s output drive, the final low speed produces high torque so that the required rotary torque is available at an acceptable speed. Electrical circuits or electronic circuitry is used to control the starting and stopping of the motor when the valve is at the required position.
There are two main methods of achieving an electric opening and closing of a valve, one relates to a quarter-turn valve only, the other to either a part-turn or multi-turn electric actuator. Generally only applicable with an electric ball valve, is a uni-directional electric valve actuator. A uni-directional electric actuator always rotates in the same direction with the motor being stopped at 90 degree intervals, typically by cams fixed to the output shaft striking electrical micro-switches which cut the power to the motor, and await an electrical command to run to the next position. This type of electrical actuator function reduces the cost of the electronic controls as the motor always rotates in the same direction. Despite this uni-directional electric actuators are not a popular design as they are now out-dated and are now relatively rare. By far the most common type of electric actuator is the reversible electric valve actuator. This type of actuator drives a valve from open to close in one direction – usually clockwise, then reverses to travel from the closed to the open position. The direction of rotation of the motor reverses to achieve this operation. In on-off reversible electric valve actuators the motor runs and via the gearbox to which it is connected, rotates the output drive until either cams fixed to the output shaft strike electric micro-switches, or alternatively magnetic sensors, detect the desired position and stop the motor. The motor awaits the next electrical command, at which point the motor runs in the opposite direction to reverse the output shaft, again until either cams or magnetic sensors stop it.
Dongming’ s DC Gearbox Motor Solution for Electric Valve Actuator
There are many type Electric Valves. We only talk about the 90 degree open/close valve. Because When at the beginning of open and at the end of close, valve will hit stall, so at this moment, the stall torque is very high. It cases gear broken easily. And at the same time, the current is also very high, it is easy make motor burned. That is what most important issue we need to solve.
DONGMING engineer team develop and test by test. We got the balance point which the gear is not broken and the valve is close completely 100%. A proper solution is provided by us. We recommend use our spur square gearbox motor DM-95SS series.
DONGMING MOTOR advantages for electric valve:
- Low speed
- High Torque
- Gear not broken at stall
- low current
- Long lifetime
Related Products
Diamater: 36mm
Voltage: 12V~24VDC
Speed: 5RPM-15RPM
Torque:1kg.cm~80kg.cm
Gearbox Diameter: 12mm
Voltage: 6v-24v
speed: 2rpm-250rpm
torque: <5kgf.cm
Diamater: 12mm
Voltage: 3~12VDC
Speed: 1~2000RPM
Torque: 0.02~2kg.cm
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DONGMING MOTOR specializes in automatic door operator motors and gear motors. We have provided DC gear motors for the commercial automatic door operator industry for years and our success lies in our long-standing focus on quality and value. We focus on four commercial door operator applications: Slide Door Operators Swing Door Operators Overhead Door Operators Revolving Door Operators Slide Door Operators Electric sliding doors found in public buildings are designed to add customer convenience. Electric sliding doors on elevators are a requirement. Both types of electric sliding doors must operate quietly and efficiently, relying on the power behind its electric gear motor inside. Typical electric sliding doors are interior doors and may not need the IP ratings of exterior door use. Swing Door Operators Hospitals, clinics and retail locations will typically use an electric swing door. A rugged and durable gear motor that is quiet in operation is just as important as its longevity. Power Electric ensures the highest quality, durability and reliability and we work to continuously maintain and improve. Overhead Door Operators Also commonly referred to as garage door openers, we focus on commercial-grade operators for motor and gear motor applications. Motors and gear motors for these heavy doors must operate with precise torque and efficiency, be extremely reliable and durable and able to withstand environmental demands. Learn more on IP Ratings to discover what it means and contact us to discuss what’s right for your needs. Revolving Door Operators Electric revolving doors save energy by reducing the drafts of air that escapes through swing or slide doors. These types of doors also improve traffic flow in commercial areas. Revolving doors must be powered by a gear motor that meets energy efficient standards as well as have a long lifespan. Contact us to talk through how your revolving door operators can benefit from housing a Power Electric-sourced gear motor. DONGMING MOTOR works with automatic door operator equipment companies throughout the world, assisting customers with motor and gear motor solutions for their projects. Connect with our in-house engineering experts for custom electric motors or find support choosing the right product for your electric door operator applications by calling 86-755-2973-5896.
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