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Electronic Actuators for Control Valves
The world of process control has mostly relied upon
pneumatic linear actuators for many years. Advances in
electric actuators, especially electronic actuators, have
achieved similar functionality as pneumatics with the added
advantages of electrical operation. Flowserve Limitorque
introduced the MX, the first multi-turn electronic,
non-intrusive actuator with an absolute encoder, almost
20 years ago. The QXM, also with an absolute B.I.S.T (Built
In Self-Test) encoder followed; it uses a brushless DCV
motor (BLDC) specifically designed for the choke and control
valve industry.
In order to meet the demands of the choke and control
valve markets, a linear base can be added to complement
the MX and QXM products to provide a linear output. The
LB (Linear Base) is available in two sizes and can sustain
thrust up to 25 000 lb/109 kN. Please see Linear Base 1 and
2 Selection Tables for the ratings of LB1 and LB2 when
combined with either the MX or QXM products.
