Valve actuators

Details Valve actuators Valve actuators

F - Mech Eng,Light,Heat,Weapons

16

K

341/108, 341/91,

F16K 31/04 (2006.01) H02P 7/29 (2006.01)

Patent

CA 1184627

ABSTRACT OF DISCLOSURE. " Valve Actuators" A valve actuator comprises a variable speed motor, a speed control circuit for controlling the motor speed including speed selector means by means of which the desired motor speed can be set to different values by adjustment means. A torque limit control circuit is arranged to stop said motor when a pre-set torque limit has been exceeded. The torque limit control includes a torque sensor arranged to provide a measure of torque from one or more torque-related electrical paramters of the motor for example a torque related current flowing in the motor, and adjustment means for setting torque limit control circuit to different torque limits.

401192

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