Flowserve 72 Series Electri-SAFE - Manual (Page 4)

4 Series 72 “Electric-SAFE” On/Off Operation Including CLC Option WCAIM2049
INSTALLATION OF ACCESSORIES
For details on installation of accessories, refer to the installation
instructions contained in respective accessory kit.
OPERATION
The Series 72 Actuator opens when power is applied. The hydraulic
pump/motor is turned off when the actuator reaches its full open
position by the limit switch SW-1. Power is maintained to the
normally open solenoid to keep the actuator in the open position.
A. Basic Actuator
The Series 72 actuator drive shaft rotates through a full 90°
segment with approximately 2° overtravel at each end of travel.
Rotation is accomplished by pumping hydraulic fluid into the
center chamber, forcing the two opposing pistons apart, resulting
in a counter-clockwise rotation of the drive shaft to the "open"
position. Closure is accomplished by means of springs contained
within the end caps which force the pistons together when the
power to the solenoid has been interrupted.
If rotation opposite to that described above is required, refer to
the section on Installation for the proper procedure to reverse
the rotation.
B. Stroke Times
On/Off Version:
Standard stroke times of the Series 72 actuator are shown in the
following table. Times shown represent average times under 50%
load conditions at 72 degrees Fahrenheit environmental
temperature. Opening and closing speeds will increase as the
environmental temperature goes down. Actuator temperature can
be controlled through the use of heater elements, heating bands,
insulation, and other typical means for hydraulic equipment
temperature control.
The figures shown below are meant as an indication of obtainable
speeds only. Faster or slower speeds are obtainable, if required,
by using additional control equipment.
Actuator Size 1572 2072
Opening @ 72°F 6 sec. 10 sec.
Closing @ 72°F 1 sec. 3 sec.
CLC Version:
The Series 72 equipped with the CLC option can attain the same
speeds as the On/Off Version, or be adjusted to attain slower
opening or closing speeds. Control of the actuator’s cycle time is
achieved by breaking up the power applied to the actuator into a
series of pulses. Opening and closing speeds will increase as the
environmental temperature goes down. Actuator temperature can
be controlled through the use of heater elements, heating bands,
insulation, and other typical means for hydraulic equipment
temperature control.
The length of time a power pulse is applied is controlled by the
“ON” adjustable control. The interval between pulses is controlled
by the “OFF” adjustable control.
To adjust, start with both controls at midpoint. To reduce cycle
time on 120 VAC units, turn “ON” control in CW direction and
“OFF” control in CCW direction. To increase cycle time turn “ON”
control in CCW direction and “OFF” in CW direction. To reduce
cycle time on 240 VAC units, turn “ON” control in CCW direction
and “OFF” control in CW direction. To increase cycle time turn
“ON” control in CW direction and “OFF” control in CCW direction.
Flow Control Division
Worcester Controls
DC Wiring
CCW/CW (OPEN/CLOSE) CW (CLOSE) CCW (OPEN)