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Designed for any rising stem valve application but especially for choke valves and small control valves in upstream oil and gas, water and power applications, the Flowserve Limitorque QXM is a smart electronic valve actuator limited to a maximum of twenty drive sleeve turns. The QXM encoder is the same one used in the Limitorque QX.  It employs system-on-chip technology, which permits redundant, 12-bit resolution over 20 total turns or an accuracy of less than 2 degrees of rotation. This redundancy feature is part of the B.I.S.T. (built-in-self-test) feature of the MX and QX.

QXM also utilizes the same brushless direct current voltage motor as the innovative QX smart actuator. The use of a BLDC motor will meet most global voltage requirements. This unique feature is an advanced technology which eliminates sparks, reduces mechanical and electrical noise and dissipates heat better than DC motors with brushes. A brushless motor design lasts longer than conventional motors and allows for more accurate positioning. This is especially important in functions which require choke valves and control valves. The use of a BLDC motor in conjunction with the absolute encoder assists in providing the precision users are demanding in their processes.

The Limitorque QXM is available for limited multi-turn valves that require a minimum of 18 lb.ft/24 Nm to a maximum of 250 lb.ft./337 Nm of torque and from 3-24 RPMs.

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