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

 

Specifications for Series DT Industrial 1/4 -Turn 
Stainless Steel Gear Operators

Definition

DynaTorque Stainless Commercial Grade Operators are suited for applications where maximum valve torque ratings have been accurately calculated. All units have been designed to withstand loads far in excess of their rated torques. Operators in this category are totally enclosed, weatherproof and permanently lubricated. DT21 is suitable for use with chainwheel operators. DT3 and DT7 are not suitable for chainwheel operation. (These actuators 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, covers, indicators, and bolting hardware are 300 series stainless steel, worms are heat-treated carbon steel, worm wheels are cast ductile iron (manganese bronze option), input shafts are 17-4ph stainless steel, shaft and worm seals are Buna-N rubber, housing to cover seals are liquid gasket, bushings are oil impregnated copper nickel steel alloy.

*Note: Some units now available using Stainless Steel Gearing, Consult factory for more information.

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Model

Unit Wgt. LBS.

Max. Output Torque Lb.-In.

Gear Ratio

Turns for 90 Deg.

Std. Output Bore

Std. Key Size

Sq.

Std. Mounting Pattern

Mech. Adv.

HDW Size

Inches

Approx Rim Pull Lbs.

Qty. & Size

Bolt Circle

 

DT3

8

4,500

30:1

7.5

1.000

.250

(4)3/8-16

3.250

8.10

14

80

DT7

14

10,000

48:1

12

1.750

.375

(4)1/2-13

5.000

12.96

18

86

DT21

33

26,000

60:1

15

2.500

.500

(4)5-8-11

5.512

13.20

36

109

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. Bore, keyways, and mounting patterns listed are for DynaTorque standards. Please consult factory for special bore treatments, costs, and deliveries.

3. Standard mounting patterns on all operators are (4) tapped holes straddling centerline at 45 degrees.