Limitorque QX Electronic Actuator FCD LMENIM3314-01 – 06/18
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2.1 QX Actuator Subassembly Components
Table 2.1 - Typical QX Actuator Subassembly
Item Number Description
3 Baseplate
5 Motor cartridge
6 Clutch shaft
7 Clutch fork
10 Handwheel cover
10-4 Handwheel
11 Motor
14-1 Encoder
14-4 Terminal block
14-8 Power controls
15-3 Controls cover
2.1.1 Product Description
Your QX actuator controls the opening and closing travel of valves and other actuated devices. OPEN and CLOSED
limits are protected by an absolute encoder that provides optical sensing of valve position and measures valve position
in both motor and handwheel operation. No battery or backup power supply is required. Output torque is derived
from current, voltage and temperature. If the preset torque is exceeded, the motor shuts off. As a result of this reliable
and advanced protection technology, all valve and other actuated devices are protected from potential damage from
overload, improper seating and foreign obstructions.
A range of control and network options is available which can be easily added to the control capabilities already
available on a standard actuator. Contact your local Limitorque distributor or Limitorque sales office for further
information.
2.1.2 Storage
Storage Recommendations
Your QX actuator is double-sealed and weather-proof as shipped, even for explosion-proof applications, providing
all compartment covers and cable entry plugs are left intact. Actuators should be stored in a clean, dry, protected
warehouse until ready for installation. If actuators must be stored outdoors, they should be stored off the ground and
high enough to prevent being immersed in water or buried in snow.
Preferred Storage Orientation
Your QX actuator should be stored with terminal compartment in the vertical position and the drive base down to
obtain optimum service life.
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