Actuators; Pneumatic Damper Actuator Torque Ratings; Torque Rating - Honeywell Pneumatic Controls Engineering Manual

Pneumatic Damper Actuator Torque Ratings

TORQUE (LB-IN.) DELIVERED TO A 90-DEGREE STROKE DAMPER SHAFT:
Spring Range
Actuator Psi (kPa)
MP913 10-15 (69-103)
5-10 (34-69)
MP916 3-12 (21-83)
4-8 (27-55)
5-12 (34-83)
MP909D 3-8 (21-55)
5-10 (34-70)
8-13 55-90)
5-10 (34-70)
MP909E 2.5-6.5 (17-45)
3-13 (21-90)
5-10 (34-70)
5-10 (34-70)
9-13 (62-90)
MP909H 9-13 (62-90)
plus positioner
MP918A 8-13 (55-90)
plus positioner
MP918B 3-7 (21-49)
3-13 (21-90)
5-10 (34-70)
8-13 (55-90)
MP920 7-13 (34-90)
a
Torque in this column is for modulating service only.
b
The lesser of retracted or extended shaft torque.
The following reference formulas are valid for actuators mounted on fixed brackets only.
Most dampers operate through a 90-degree arc. The amount of torque that a pneumatic actuator can deliver to the damper shaft
may be calculated from the net force delivered and the length of stroke of the actuator using the following equations:
T
T =
M
T = Torque with actuator shaft retracted.
R
T = Torque with actuator shaft extended.
E
The midstroke is significant only for modulating service and is based on the premise that an input pressure change no greater than
1.5 psi (10 kPa) should cause the actuator to reposition the damper.
72 customer.honeywell.com
Stroke Shaft
in. (mm) Retracted
1 (25) 11 (1.243)
1 (25) 6 (0.678)
2-1/4 (57) 41 (4.632)
2-1/4 (57) 51 (6.214)
2-1/4 (57) 69 (7.796)
2-3/8 (60) 10.7 (1.209)
2-3/8 (60) 17.9 (1.98)
2-3/8 (60) 28.6 (3.232)
3 (76) 22.5 (2.543)
3.1 (79) 25.6 (2.893)
4 (101) 39.6 (4.475)
4 (101) 66 (7.458)
3.1 (79) 51.2 (5.786)
3.1 (79) 92.1 (10.41)
3.1 (79) 92.1 (10.41)
3-1/2 (89) 333 (37.63)
3-1/2 (89) 125 (14.3)
3-1/2 (89) 125 (14.3)
3-1/2 (89) 208 (23.5)
3-1/2 (89) 333 (37.63)
6 (152) 520 (58.75)
F S
R
= --------------- -
R
2
1.5 A 0.707S
Delivered Torque lb-in. (N•m)
a
Midstroke 13 psi (90 kPa) main 18 psi (129 kPa) main 20 psi (138 kPa) main
2 (0.226) 0 (0)
2 (0.226) 3 (0.339)
26 (2.937) 14 (1.582)
26 (2.937) 69 (7.796)
26 (2.937) 14 (1.582)
7.6 (0.859) 17.9 (2.023)
7.6 (0.859) 10.7 (1.209)
7.6 (0.859) 0 (0)
9.5 (1.974) 13.5 (1.526)
22 (2.486) 66.5 (7.515)
28 (3.164) 0 (0)
28 (3.164) 39.6 (4.475)
22 (2.486) 30.7 (3.469)
22 (2.486) 0 (0)
0 (0)
b
0 (0)
b
88 (9.944) 250 (28.25)
88 (9.944) 0 (0)
88 (9.944) 125 (14.3)
88 (9.944) 0 (0)
158 (17.85) 0 (0)
T = Midstroke torque.
M
F = Force exerted by actuator with shaft retracted.
R
F = Force exerted by actuator with shaft extended.
E
A = Effective area of actuator diaphragm.
S = Actuator stroke.
70-6925
Shaft Extended
3 (3.339) 5 (0.565)
9 (1.017) 13 (1.469)
138 (15.6) 109 (12.315)
138 (15.6) 166 (18.755)
82 (9.264) 109 (12.315)
35.7 (4.034) 42.8 (4.836)
28.6 (3.232) 35.7 (4.034)
17.9 (2.023) 25.0 (2.825)
36 (4.008) 45 (5.085)
118 (13.33) 138 (15.59)
66 (7.058) 92.4 (10.44)
105.6 (11.93) 132 (14.92)
81.8 (9.243) 102 (11.53)
51.2 (5.786) 71.7 (8.102)
66 (7.1) 92.4 (10.44)
208 (23.5) 292 (33)
458 (51.53) 541 (61.3)
208 (23.5) 292 (33)
333 (37.63) 416 (47.01)
208 (23.5) 292 (33)
372 (42.03) 521 (58.86)
F S
E
T = --------------- -
E
2