• Overview
  • Specifications

Overview

The Cameron commercial-grade DYNATORQUE 360 multiturn worm-gear operator is made for applications that require multiple output turns but do not require the operator to withstand thrust loading. These operators do not have positive output stops. Operators listed have bores, keyways, and mounting dimensions as listed on the individual operator envelope drawings. Operators are assembled in position II (clockwise input results in clockwise output) and have one shop coat of black oxide primer. Operator pricing does not include handwheels.

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,
lbm
Maximum
Output
Torque,
in.lbf
Gear
Ratio
Turns
for
360°
Standard
Output
Bore, in
Standard
Key
Size, in2
DT3  7 4,500 30:1 30 1.000 0.250
DT7  15  10,000 48:1 48 1.750 0.375
DT8  19  8,000 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 
and Size, in
Standard 
Mounting
Pattern
(Bolt Circle)
Mechanical
Advantage
Handwheel
Size,
in
Approximate 
Rim Pull,
lbf
DT3  Four 3/8–16
3.250 8.10 14 80
DT7  Four 1/2–13
5.000 12.96 18 86
DT8  Four 1/2–13
5.000 8.10  24 82
DT12  Four 1/2–13
4.921 13.68 30 78
DT21
Four 5/8-11
5.512 22.50 30 77
DT36
Four 3/4–10
6.496  19.00  36  105 
DT50
Four 3/4–10
6.496  60.80  20  80 
DT54
Four 3/4–10
6.496  91.20  18  77 

  Indicates units with spur assist.

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. Handwheels are not included as part of the operator part list or price. 

Bore, keyways, and mounting patterns listed are for Cameron standards. Consult Cameron for special bore treatments, costs, and deliveries.

Standard mounting patterns on the DT3 through the DT54 are four tapped holes straddling centerline at 45°.