• Overview
  • Specifications
  • Related Products

Overview

Our DYNATORQUE Series SD  automated-valve declutchable manual overrides are used with pneumatic, hydraulic and back-drivable electric actuators. These products are sandwich mounted as part of an automated valve package to provide manual operation of the automated valve if a loss of plant air supply, power gas, hydraulic fluid power, or electricity occurs.

  • Standard ISO 5211 mounting dimensions on top and bottom flanges or custom machined for mounting to actuator and valve
  • Device is transparent to valve operation when disengaged
  • Suitable for either double acting or spring return actuators
  • 9 different frame and spur combinations provide output torque from 3000 to 140,000 lb-in (340 to 15,815 N·m)
  • One-handed declutch mechanism
  • Declutchable override sandwich mounted between valve and actuator
  • Units are suitable for use in all handwheel applications with DYNATORQUE chainwheel adapters.
The declutch mechanism is designed to mount between the valve and its primary driving mechanism. The declutch locks in both the engaged and disengaged positions.

We offer a locking device for the SD manual overrides to prevent engagement or disengagement

Specifications

 

Model  Double Acting Actuators
Maximum Valve Torque
lb-in  [N·m]
Spring Return Actuators
Actuator Spring End Torque
lb-in  [N·m] 
Override Maximum 
Torque Rating
lb-in  [N·m]
Mechanical
Advantage
HW
Size*
Rim
Pull*
DT3SD  2400  [271] 1100  [124]
3000  [339]  8.10  10 74
DT7SD  5600  [633]  2600  [294]
7000  [791]
12.96 14 77
DT12SD 
9600  [1085]
4550  [503]
12,000  [1356]
13.68 24 73
DT21SD 
16,800  [1898]
7775  [879]
21,000  [2373]
22.50 30 62
DT36SD 
28,800  [3254]
13,330  [1506]
36,000  [4067]
19.00 36  105
DT40SD 
32,000  [3616]
14,815  [1674]
40,000  [4519]
27.60 36 81
DT50SD 
40,000  [4520]
18,520  [2093]
50,000  [5649]
60.80 36 46
DT54SD 
50,400  [5695]
23,330  [2636]
63,000  [7118]
91.20 20 69
DT90SD 
72,000  [8136]
33,325  [3766]
90,000  [10,169]
49.92 36 100
DT140SD 
112,000  [12,655]
51,850  [5859]
140,000  [15,818]
78.00 36 100


Model  Hsg Bottom
Mounting Pattern
(Min. BCD/Tap)
Hsg Bottom
Mounting Pattern
(Std. BCD/Tap)
Hsg Bottom
Mounting Pattern
(Max. BCD/Tap)
DT3SD 
1.968-1/4-20
2.756-(4)5/16-18
4.016-3/8-16
DT7SD
3.250-3/8-16
4.016-(4)3/8-16
5.000-1/2-13
DT12SD
3.750-3/8-16
4.921-(4)1/2-13
6.496-3/4-10
DT21SD 
4.500-5/8-11
5.512-(4)5/8-11
7.000-3/4-10
DT36SD
6.000-1/2-13
6.496-(4)3/4-10
10.250-3/4-10
DT40SD
6.000-1/2-13
6.496-(4)3/4-10
10.250-3/4-10
DT50SD 
6.000-1/2-13
6.496-(4)3/4-10
10.250-3/4-10
DT54SD 
6.000-1/2-13
6.496-(4)3/4-10
10.250-3/4-10
DT90SD
6.500-3/4-10
10.000-(8)5/8-11
11.750-3/4-10
DT140SD
6.500-3/4-10
10.000-(8)5/8-11
11.750-3/4-10

Model  Cover Mounting
Pattern
(Min. BCD/Tap)
Cover Mounting
Pattern
(Std. BCD/Tap)
Cover Mounting
Pattern
(Max. BCD/Tap)
Total 
Weight
 (lb)
DT3SD 
2.756-.344
2.756-(4).344
4.250-.406
20 
DT7SD
3.750-.438
4.016-(4).406
5.000-.562
28 
DT12SD 
4.750-.562
4.921-(4).562
6.496-.812
45 
DT21SD
5.500-.562
5.512-(4).688
7.750-.812
62 
DT36SD
6.000-.563
6.496-(4).812
10.000-.688
130 
DT40SD 
6.000-.563
6.496-(4).812
10.000-.688
130 
DT50SD 
6.000-.563
6.496-(4).812
10.000-.688
168 
DT54SD 
6.000-.563
6.496-(4).812
10.000-.688
163 
DT90SD 
8.500-.688
10.000-(8).688
10.750-.812
268 
DT140SD
8.500-.688
10.000-(8).688
10.750-.812
271 


Notes:

* Handwheel and rim efforts shown are calculated at unit maximum torque rating. In the event that different handwheel and rim effort combinations are desired, please use the following formulas or contact us for assistance. 

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 two. 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 two. Then divide this result by the handwheel diameter.

1. The DT50SD and DT90SD have a 4:1 spur assist. DT54SD and DT140SD have a 6:1 spur assist.

2. Handwheels listed are recommended sizes to produce full rated torque with rim effort listed.

3. Standard mounting patterns on all units are per ISO 5211 (UNC) specifications.

4. Please consult factory for special bore treatments, metric threads or other non-standard configurations.