• Overview
  • Specifications

Overview

Our DYNATORQUE multi-turn worm-gear operator (360 Deg) are commercial grade, worm geared, and made for applications that require multiple output turns but do not require the operator to withstand thrust loading. 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 hand wheels.

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
DT7  15  10000 48:1 48 1.750 0.375
DT8  19  8000 30:1 30 1.750 0.375
DT12  26  16000 57:1 57 2.000 0.375
DT21
34 26000  60:1  60
2.500 0.500
DT36
78 36000 53:1 53 3.250 0.750
DT50*
105 50000 212:1  212 3.250
0.750
DT54*
108 63000  318:1  318 3.250
0.750  

  

Model  Standard 
Mounting
Pattern 
(Quantity 
and Size)
Standard 
Mounting
Pattern
(Bolt Circle)
Mechanical
Advantage
HDW 
Size 
in.
Approximate 
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 
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.