Pneumatic Actuated - KTH Sales, Inc.
Pneumatic Actuated - KTH Sales, Inc.
Pneumatic Actuated - KTH Sales, Inc.
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Sizing and Selection<br />
Double Acting Actuators<br />
Top View<br />
Air In<br />
Air pushes pistons outward,<br />
pinion turns counterclockwise<br />
Air In<br />
Air pushes pistons inward,<br />
pinion turns clockwise<br />
Sizing<br />
1. Determine the maximum torque of the valve to be actuated<br />
2. Add a reasonable safety factor to the valve torque to obtain the required actuator<br />
torque (safety factor = 20% to 50% based on working conditions)<br />
3. Refer to Double Acting torque chart below. Read down the Air Supply Pressure<br />
column to the first torque that exceeds the determined required torque, then left<br />
to find appropriate actuator size<br />
Example:<br />
Valve breakaway torque is 100 in.lbs. x 20% safety factor = 120 in.lbs.<br />
Available air supply is 70 psi. Reading down the 70 psi column, the<br />
first torque exceeding the requirement is 156 in.lbs. Selected actuator<br />
is DA52<br />
Torque Output - Double Acting<br />
MOD<br />
DA 32<br />
DA 52<br />
DA 63<br />
DA 75<br />
DA 85<br />
DA 100<br />
DA 115<br />
DA 125<br />
DA 160<br />
DA 200<br />
DA 270<br />
Air Supply Pressure (PSI)<br />
40 50 60 70 80 90 100 115<br />
Torque Output Double Acting Actuators (in.lbs.)<br />
34 43 55 64 71 82 87 101<br />
86 110 133 156 179 203 226 261<br />
154 196 238 280 321 363 405 468<br />
284 360 435 511 586 661 737 850<br />
408 518 629 740 851 962 1072 1238<br />
646<br />
1070<br />
1409<br />
2930<br />
818<br />
1355<br />
1783<br />
3662<br />
991<br />
1640<br />
2157<br />
4394<br />
1163<br />
1925<br />
2532<br />
5127<br />
1336<br />
2210<br />
2906<br />
5859<br />
1508<br />
2495<br />
3280<br />
6591<br />
1681<br />
2780<br />
3654<br />
7324<br />
1939<br />
3208<br />
4216<br />
8422<br />
5488 6866 8239 9612 10981 12359 13732 15792<br />
12734 15919 19097 22284 25469 28654 31832 36611<br />
7
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