Overview

Cameron DYNATORQUE gear operators are modified with an infinitely adjustable "memory stop" device suitable for valves and dampers, as well as most other quarter-turn applications requiring a self-locking mechanism.

This configuration is ideal for use when a valve or damper is used for flow control and must always be opened or closed to the same exact position. The addition of a traveling nut module allows repeatable valve travel to the predesignated set point.

Our 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 materials are cast gray or ductile iron, but the line also offers a varied selection of alternate materials to meet customer application requirements.

Specifications

 

Model  Unit
Weight
lb
Maximum
Output
Torque
lb-in
Gear
Ratio
Turns
for
360
Degrees
Standard
Output
Bore
Standard
Key
Size Sq.
DT3  7 4500 30:1 30 1.000 0.250
DT8  19  8000 30:1 30 1.750 0.375
DT12  26  16,000 57:1 57 2.000 0.375
DT21
34 26,000  60:1  60
2.500 0.500
DT36
78 36,000 53:1 53 3.250 0.750
DT50*
105 50,000 212:1  212 3.250
0.750
DT54*
108 63,000  318:1  318 3.250
0.750  

  

Model  Standard
Mounting
Pattern 
(Quantity 
& Size)
Standard 
Mounting
Pattern
(Bolt Circle)
Mech.
Adv.
HDW 
Size 
in.
Approx.
Rim 
Pull 
lb
DT3  (4)3/8-16
3.250 8.10 14 80
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 
DT50*
(4)3/4-10
6.496  60.80  20  80 
DT54*
(4)3/4-10
6.496  91.20  18  77 

*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's standards. Please consult us 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.