ABB LP10, Manual, Page: 6 / 42

LP LINEAR PISTON ACTUATORS INSTRUCTION MANUAL
4
2.0 RATINGS
Thrust Ratings
The basic thrust rating of a pneumatic piston is
equal to the area of the piston times the supply
pressure. The minimum supply pressure for both
the TZIDC and the AV1 is 20 psi.
The maximum supply pressure for the
TZIDC is 90 psi and 125 psi for the AV
positioner.
The area of the piston is A = π D
2
/4. Subtract
approximately 10% for friction losses and
because the rod side of the piston has less area.
An example is shown for an 80 psi air supply:
To find the lever length that would result in 90
o
rotation of the damper shaft, multiply the cylinder
stroke length by 0.707.
Please refer to the individual Product
Specifications for details on the AV and TZIDC
Positioner performance.
Operating Torque/Thrust Actuator Type
Characteristic LP10 LP20 LP30 LP32 LP40 LP50 LP60
Area-Retracting (Rod Side) 4.71 in. 2 11.2 in. 2 26.8 in. 2 26.8 in. 2 48.8 in. 2 48.8 in. 2 76.1 in. 2
Area-Extending (other side) 4.91 in. 2 11.94 in. 2 28.3 in. 2 28.3 in. 2 50.3 in. 2 50.3 in. 2 78.5 in. 2
Force out @ 80 psi
1
339 lbs. 806 lbs 1930 lbs. 1930 lbs. 3514 lbs. 3514 lbs. 5479 lbs.
Lever Length for 90º Rotation 3.54 in. 2.83 in. 5.66 in. 11.32 in. 5.66 in. 11.32 in. 11.32 in.
Operating Torque @ 80 psi
2
71 ft. lbs. 134 ft. lbs. 643 ft. lbs.
1286 ft.
lbs.
1172 ft. lbs 2341 ft. lbs. 3651 ft. lbs.
Note 1: Use the rod side area x psi to calculate force. Subtract 10% for friction loss.
Note 2: Torque at mid-stroke is 1.4x torque at +/- 45º