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

Specifications For Series DT Quarter-Turn
 Iron Worm Gear Operators

Definition

DynaTorque Commercial Grade Operators are suited for application 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. Units are suitable for use in all handwheel and chainwheel applications with the exception of the DT1, DT3, and DT7 (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 and covers are iron, with the exception of the DT1 which is cast steel, worms are heat-treated carbon steel, worm wheels are cast ductile iron, input shafts are carbon steel with yellow zinc coating (exception DT1 is e-coated), shaft and worm seals are Buna-N rubber, housing to cover seals are styrene butadiene, 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 Deg.

Std. Output Bore

Std. Key Size

Sq.

Std. Mounting Pattern

Mech. Adv.

HDW Size

Inches

Approx Rim Pull Lbs.

Qty. & Size

Bolt Circle

 

DT1

6

1,500

30:1

7.5

.500

.125

(4)5/16-18

2.756

8.10

6

62

DT3

7

4,500

30:1

7.5

1.000

.250

(4)3/8-16

3.250

8.10

14

80

DT7

15

10,000

48:1

12

1.750

.375

(4)1/2-13

5.000

12.96

18

86

DT8

19

8,000

30:1

7.5

1.750

.375

(4)1/2-13

5.000

8.10

24

82

DT12

26

16,000

57:1

14.25

2.000

.375

(4)1/2-13

4.921

13.68

30

78

DT21

34

26,000

60:1

15

2.500

.500

(4)5-8-11

5.512

22.5

30

77

DT36

78

36,000

53:1

13.25

3.250

.750

(4)3-4-10

6.496

19.00

36

105

DT50*

105

50,000

212:1

53

3.250

.750

(4)3/4-10

6.496

60.80

20

80

DT54*

108

63,000

318:1

79.5

3.250

.750

(4)3/4-10

6.496

91.20

18

77

DT60

111

60,000

60:1

15

3.250

.750

(8)3/4-10

10.250

15.60

36

213

DT90*

145

90,000

240:1

60

3.250

.750

(8)3/4-10

10.250

49.92

36

100

DT140*

148

140,000

360:1

90

3.250

.750

(8)3/4-10

10.250

78.00

36

104
DT220* 402 220,000 600:1 150 6.250 1.5x1.0 (8)1 1/8-7 14.016 150 36 81
DT300* 460 300,000 1200:1 300 6.250 1.5x1.0 (8)1 1/8-7 14.016 264 30 76

*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 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.

 

ISO 9001 CERTIFIED

 
3. Standard mounting patterns on the DT3 through the DT54 are (4) tapped holes straddling centerline at 45 degrees. Standard mounting patterns on the DT60 through the DT300 are (8) tapped holes straddling at 22.5 degrees.