Скачать или смотреть Valworx Electric Actuators

On/Off electric actuators open and close the valve via an electric motor. Upon receipt of a continuous signal, the motor runs until the valve is rotated 90 degrees, completely closing or opening the valve. When the valve reaches the closed or open position, an internal cam on the actuator strikes a limit switch and shuts off the motor. If the electric signal is lost mid-stroke, the valve stays in mid-stroke position.
Electric actuators come in a variety of torque ratings, from as low as 15Nm to 600Nm or more. Common voltages are 24VDC and 120VAC.
Some features that differentiate higher quality electric actuators include an all-metal gear drive, a weatherproof enclosure (normally IP 67 NEMA 4X or higher), a thermostatic heater to prevent internal condensation, a manual override mechanism and a dome position indicator.

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