NOTE! For Certified Dimensions contact the Factory!   Data on this site is for information only.

Specifications for Series DT Quarter-Turn
Aluminum Worm Gear Operators

Definition

DynaTorque basic grade actuators are suited for applications where maximum valve torque ratings have been accurately calculated and where actuators will not be subjected to torques higher than the rating. Actuators in this category are totally enclosed, weather-proof, and permanently lubricated. The DT2 & DT5 are not recommended for use with handwheels over 18" in diameter and are not recommended for use with any of our chainwheel options.

Construction

Unit housings and covers are cast aluminum, worms are heat-treated carbon steel, worm wheels are ductile iron, input shafts are carbon steel with yellow zinc coating, shaft and worm seals are Buna-N rubber, housing-to-cover seals are silicon sealant, bushings are oil impregnated copper nickel steel alloy.

 

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Model

Unit
Wgt.
Lbs.

Max

Output
Torque
Lb.-in.

Gear
Ratio

Turns
for

90°

Output
Bore
(IN)

Std.
Keyway
Size
(IN)

Std. Mounting Patterns

Mechanical
Advantage

Approx.
Hdwl.
Size
(IN)

Approx.
Rim
Pull
Lbs.

Bolt Size
& Qty.

Bolt Circle (IN)

DT2

4

2,000

30:1

7.5

1.000

.250 Sq.

(4)3/8-16

3.250

8.10

6

82

DT5

7

5,000

48:1

12

1.750

.375 Sq.

(4)1/2-13

5.000

12.96

10

77

 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. Bores, keyways, and mounting patterns listed are for DynaTorque standard stocking units. Please consult the factory for special bore treatments, costs, and deliveries.

 3. Standard mounting patterns on the DT2 and DT5 are (4) tapped holes straddling centerline at 45 degrees.