New Smart Valve Actuator Utilizes Brushless Direct Current Voltage Motor
Flowserve Corp. has launched the Flowserve Limitorque QXM smart valve actuator for The Limitorque for rising stem valve applications. The QXM is suitable for choke valves and small control valves in the upstream oil and gas, water, fossil fuel and renewable power markets.
The QXM is a smart electronic valve actuator available with either 6.5 total turns, or a maximum of 20 total drive sleeve turns. This is critical for small valves that require limited travel and maximum control. The QXM encoder employs system-on-chip technology, which permits redundant, 12-bit resolution over 20 total turns, or an accuracy of less than two degrees of drive sleeve rotation. This redundancy is part of the built-in self-test feature of all Limitorque smart actuators.
The unit utilizes a brushless direct current voltage motor. This motor design meets most global voltage requirements. This feature was designed to eliminate sparks, reduce mechanical and electrical noise and dissipate heat better than direct-current motors with brushes. The Limitorque QXM is available for multiturn valves that require a minimum of 18 lb. ft./24 Nm to a maximum of 250 lb. ft./337 Nm torque and from 3-24 RPMs.