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Flow Control -   DYNATORQUE Quarter Turn Iron Worm Gear Operators

 
DYNATORQUE™ Commercial Grade Operators are suited for application where maximum valve torque ratings have been accurately calculated. All units have been designed to withstand loads far in excess of their rated torques. Operators in this category are totally enclosed, weatherproof and permanently lubricated. Units are suitable for use in all handwheel and chainwheel applications with the exception of the DT3 and DT7 (These actuators are not recommended for use with handwheels over 18” in diameter and are not recommended for use with any of our chainwheel options.)
 
Materials
Unit housings and covers are iron worms are heat-treated carbon steel, worm wheels are cast ductile iron, input shafts are carbon steel with yellow zinc coating, shaft and worm seals are Buna-N rubber, housing to cover seals are styrene butadiene, bushings are oil impregnated copper nickel steel alloy.
 
Model
Unit Wgt. LBS.
Max. Output Torque Lb.-In.
Gear Ratio
Turns for 90 Deg.
Std. Output Bore
Std. Key Size
Sq.
Std. Mounting Pattern
Mech. Adv.
HDW Size
Inches
Approx Rim Pull Lbs.
Qty. & Size
Bolt Circle
 DT3
7
4,500
30:1
7.5
1.000
.250
(4)3/8-16
3.250
8.10
14
80
15
10,000
48:1
12
1.750
.375
(4)1/2-13
5.000
12.96
18
86
19
8,000
30:1
7.5
1.750
.375
(4)1/2-13
5.000
8.10
24
82
26
16,000
57:1
14.25
2.000
.375
(4)1/2-13
4.921
13.68
30
78
 DT21
34
26,000
60:1
15
2.500
.500
(4)5-8-11
5.512
22.5
30
77
78
36,000
53:1
13.25
3.250
.750
(4)3-4-10
6.496
19.00
36
105
78
40,000
79:1
19.75
3.250
.750
(4)3-4-10
6.496
27.6
36
80
105
50,000
212:1
53
3.250
.750
(4)3/4-10
6.496
60.80
20
80
108
63,000
318:1
79.5
3.250
.750
(4)3/4-10
6.496
91.20
18
77
 DT60
111
60,000
60:1
15
3.250
.750
(8)3/4-10
10.250
15.60
36
213
145
90,000
240:1
60
3.250
.750
(8)3/4-10
10.250
49.92
36
100
148
140,000
360:1
90
3.250
.750
(8)3/4-10
10.250
78.00
36
104
402
220,000
600:1
150
6.250
1.5x1.0
(8)1 1/8-7
14.016
150
36
81
460
300,000
1200:1
300
6.250
1.5x1.0
(8)1 1/8-7
14.016
264
30
76
*Indicates units with spur assist.
  
Notes:
 
1. Handwheels listed are recommended sizes to produce full rated torque with the rim effort listed. The formulas listed below will assist you in determining alternate handwheels sizes and rim pull requirements based on your application.
 
To Find: Handwheel diameter for given output torque at a given rim effort.
Divide the output torque by the mechanical advantage and multiply the result by 2.
Then divide this result by the handwheel rim effort.
 
To Find: Rim effort for a given output torque with a given handwheel diameter.
Divide the output torque by the mechanical advantage and multiply the result by 2.
Then divide this result by the handwheel diameter. 
         
Note: Handwheels are not included as part of the operator part list or price.
 
2. Bore, keyways, and mounting patterns listed are for Cameron standards. Please consult the factory for special bore treatments, costs, and deliveries.
 
3. Standard mounting patterns on the DT3 through the DT54 are (4) tapped holes straddling centerline at 45 degrees. Standard mounting patterns on the DT60 through the DT300 are (8) tapped holes straddling at 22.5 degrees.
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