ABB LP, Instruction Manual

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LP LINEAR PISTON ACTUATORS INSTRUCTION MANUAL
4
2.0 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 TZID-C and the
AV1 is 20 psi.
The maximum supply pressure for
the TZID-C 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 TZID-C Positioner performance.
LP Cylinder Thrust @ 80psi
2.5” d x 5” s 353 lbs.
4” d x 4” s 905 lbs
6” d x 8” s 2036 lbs.
8” d x 16” s 3619 lbs.
10” d x 16” s 5655 lbs.