• Overview
  • Specifications
  • Related Products

Overview

Our DYNATORQUE quarter-turn industrial worm-gear operators are designed for use with valves and dampers, as well as most other quarter-turn applications requiring a self-locking mechanism. Cameron's flexible manufacturing process allows us to offer both standard construction and custom configurations for customer-specific applications.

Standard operators are available with various mounting interface dimensions. Custom-machined gears come with bores and bolt holes for direct mounting to the valve.

Standard gearbox housings are made from cast grey iron with ductile iron as an optional material. The product line offers a varied selection of alternate component materials to meet customer application requirements.

  • 16 different frame and spur combinations provide output torque from 4500 to 300,000 lb-in (500 to 33,900 N·m)
  • Standard mounting dimensions or configured to customer requirements
  • Standard cast gray or ductile iron housing
  • Chainwheel operation available on select frame sizes
  • Optional models with 180-and 360-degree multi-turn capabilities
  • Marine, submerged, and high-and low-temperature applications
  • Available built to AWWA C-504 material and design criteria

Specifications

Model  Unit.
Wgt.
lb
Max. Output
Torque lb-in
Gear
Ratio
Turns for
90 Degrees
Std.
Output
Bore
Std. Key
Size Sq.
DT3  7 4500 30:1 7.5 1.000 0.250
DT7  15  10000 48:1 12 1.750 0.375
DT8  19  8000 30:1 7.5 1.750 0.375
DT12  26  16,000 57:1 14.25 2.000 0.375
DT21
34 26,000  60:1  15
2.500 0.500
DT36  78  36,000 53:1 13.25 3.250 0.750
DT40 78 40,000 79:1 19.75 3.250 0.750
DT50*
105 50,000 212:1 53 3.250
0.750
DT54*
108 63,000  318:1 79.5 3.250
0.750
DT60  111 60,000 60:1 15 3.250
0.750
DT90* 
145 90,000   240:1 60 3.250
0.750
DT140* 
148 140,000   360:1 90 3.250 0.750
DT200*   278 200,000 450:1 112.5 4.750 1.25X1.0
DT220*
402 220,000  600:1 150 6.250
1.5X1.0
DT300*
460 300,000 1200:1 300  6.250  1.5X1.0
Model  Std. Mounting
Pattern 
(Qty. and Size)
Std. Mounting
Pattern
(Bolt Circle)
Mech.
Adv.
HDW 
Size 
in.
Approx Rim 
Pull lb 
DT3  (4)3/8-16
3.250 8.10 14 80
DT7  (4)1/2-13
5.000 12.96 18 86
DT8 
(4)1/2-13
5.000 8.10  24 82
DT12  (4)1/2-13
4.921 13.68 30 78
DT21
(4)5/8-11
5.512 22.50 30 77
DT36
(4)3/4-10
6.496  19.00  36  105 
DT40  (4)3/4-10 6.496  27.60  36  80 
DT50*
(4)3/4-10
6.496  60.80  20  82 
DT54*
(4)3/4-10
6.496  91.20  18  77 
DT60
(8)3/4-10
10.250
15.60 36 213
DT90* 
(8)3/4-10
10.250
49.92 36 100
DT140* 
(8)3/4-10
10.250 78.00 36 104
DT200*  (8)11/8-7 14.016  120 36  93
DT220*
(8)11/8-7
14.016
150 36 81
DT300*
(8)11/8-7 14.016 264 30 75

*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 handwheel 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.