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PRODUCT DESCRIPTION
Beck Group 14 linear control drives are
engineered for precise, reliable operation of globe
valves requiring up to 4,000 lbs of thrust. The
cool, stable operation of Beck’s control motors
coupled with the powerful gear train provide the
tight, responsive control required by modern
control loops to keep operating costs low. The
motor can withstand occasional accidental stalls
of up to four days without failure, and will resume
instant response to control signals immediately
upon removal of the condition. Mechanical stops
on the output shaft prevent over-travel.
An easy-to-turn, spoke-free Handwheel is
incorporated into the Group 14 design to allow
manual operation during installation or power
outages. The Handwheel can be used to open
and close valves smoothly and easily under full
load conditions.
The Beck Tight-Seater™ coupling is a part of
the Group 14 linear drive. This preloaded disk
coupling is mounted on the drive output shaft
and provides positive seating of the valve plug
up to the rated thrust of the drive. It eliminates
high-pressure leakage, which can cause erosion
of the valve seat. A patented self-locking
mechanism holds the drive output shaft in
position when the motor is deenergized.
A Calibar index allows simple, single-point
adjustment of the length of the stroke to match
valve requirements. When this adjustment is
made, the position feedback signal, end-of-travel
limit switches, and any auxiliary switches are all
automatically adapted to the new stroke setting.
Valves may also be operated at their individual
locations with a built-in electric Handswitch.
TABLE 1:
GROUP 14 MECHANICAL AND ELECTRICAL SPECIFICATIONS
Beck’s ESR-4 Electronic Signal Receiver
provides precise drive control from either
conventional analog or computer-based control
systems.
Beck’s CPS-2 Contactless Position Sensor
provides accurate position feedback in demanding
environmental conditions, with no contacting or
wiping surfaces to wear or intermittently lose
contact.
Beck Group 14 electronic control drives are
designed with individual weatherproof enclosures
to protect the main components.
Although the Group 14 drive is normally
installed in the upright position, the drives may
be installed in any orientation. For installations
where the piping will not support the weight of
the control drive, holes are provided for mounting
hardware.
TYPICAL APPLICATIONS
Beck Group 14 linear control drives are
suitable for steam flow control, combustion gas
control, and any other application that requires
precise valve position control. A drive may be
applied to any globe, cage, or diaphragm valve
with a rising stem that has a stroke within the
capability of the drive. An integral mounting yoke
is part of each linear drive.
Beck Group 14 drives are available in stroke
ranges from 5/16” to 4 1/2”, and in a variety of
thrust and timing combinations. See Table 1 for
thrust and timing options.