July 21, 2011 - Flowserve announced the Limitorque QXM smart valve actuator. The Limitorque QXM is designed for rising stem valve applications, including choke valves and small control valves in the upstream oil and gas, water, fossil fuel and renewable power markets. Important features of the Limitorque QXM include:
- The QXM is a smart electronic valve actuator available with either 6.5 total turns, or a maximum of 20 total drive sleeve turns.
- 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.
- The QXM utilizes an innovative brushless direct current (BLDC) voltage motor.
This is especially important for small valves that require limited travel and maximum control.
This redundancy is part of the built-in self-test feature of all Limitorque smart actuators.
This positioning resolution makes the QXM one of the most accurate actuators on the market today.
This motor design meets most global voltage requirements.
This unique feature is an advanced technology that helps eliminate sparks, reduce mechanical and electrical noise, and dissipate heat better than direct-current motors with brushes.
The brushless motor is designed to last longer than conventional motors and allows for more accurate positioning.
The BLDC motor, in conjunction with the absolute encoder, helps provide the precision users are demanding in their processes.
The Limitorque QXM is available for multi-turn 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.
