MEA INC
2600 American Lane | Elk Grove Village, IL 60007 | USA
T +1 847 766 9040 | F +1 847 350 1951
COMPLETE CONTROL
www.meaincorporated.com
MEA Incorporated | Hawk Actuator Instruction and Operation Manual
02/2018
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actuator output. For example, if the rated actuator output is 10,000 in-lbs and the maximum
allowable seat load is 7,500 lbs, the pressure switch should be set at 75% of 2000 psi or 1500 psi.
4) Locate the Safe Seat pressure switch and slide the adjustment cover back towards the hydraulic
connection end of the switch to expose the adjustment ring.
5) While looking at the pressure switch with the electrical connection facing upward and hydraulic
connection facing downward use a .095” pin (a 5/64” drill bit also works well) to rotate the
adjustment ring completely to the right to lower the setpoint.
6) Using the HMI put the actuator into Manual mode and back the actuator/valve off the seat to
unload the SLA.
7) Using the HMI put the actuator into Control Mode and command the unit to stroke to the seated
position. Observe the pressure on the temporary gauge as the valve seats. This gauge pressure is
equal to the current pressure switch setpoint.
8) Increase the pressure switch setpoint using the adjustment ring to a value closer to, but still
below, the setpoint determined in step 3. Rotate the adjustment ring to the left to increase the
setpoint or rotate to the right to lower the setpoint.
9) Repeat steps 6-8, each time raising, and fine-tuning, the switch setpoint until it is equal to the
value determined in step 3.
10) Slide adjustment cover back into place over pressure switch adjustment ring.
5-11 Safety Precautions
Due to the presence of potentially dangerous electrical and mechanical energy, prior to performing
installation and maintenance of any Hawk actuator appropriate safety precautions must be taken. These
precautions should include, but not be limited to the following:
Adherence to site specific permitting and safety guidelines
Lock out, Tag out procedures where appropriate for the maintenance performed
Within any electrical work, the Hawk actuator must be de-energized
If the unit includes an accumulator or Safe Seat all stored energy must be released
5-11.1 Releasing Accumulator/Reservoir Stored Energy
1) Close the shutoff ball valves located upstream of the accumulator and reservoir.
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