Dynatorque SRD
Nondeclutchable manual override
Overview
The Dynatorque SRD™ nondeclutchable manual override is used with pneumatic, hydraulic, and backdrivable electric actuators.
Applications
Sandwich mounted between the valve and its primary driving mechanism as part of an automated valve package, the override enables manual operation of the automated valve in the event of a loss of plant air supply, power gas, hydraulic fluid power, or electricity. We also offer a locking device for these overrides to prevent unintended engagement or disengagement.
Benefits
Enhanced operational safety and reliability
Features
- Standard ISO 5211 mounting dimensions on top and bottom flanges or custom machined for mounting to actuator and valve
- Transparent to valve operation when disengaged
- Alternative to the Dynatorque SD™ declutchable manual override for spring-return applications
- Eleven frame and spur combinations that provide output torque ranging from 3,000 to 260,000 lbf.in [340 to 29,375 N.m]
Tech Specs
| Model | Spring-Return Actuator Spring-End Torque, lbf.in [N.m] |
Override Max. Torque Rating, lbf.in [N.m] | Mechanical Advantage | Handwheel Size, in | Rim Pull, lbf | Housing (Bottom) Mounting Pattern (Min. BCD*-Tap), in |
Housing (Bottom) Mounting Pattern (Std. BCD-Tap), in |
Housing (Bottom) Mounting Pattern (Max. BCD-Tap), in |
Cover (Top) Mounting Pattern (Min. BCD-Hole), in |
Cover (Top) Mounting Pattern (Std. BCD-Hole), in |
Cover (Top) Mounting Pattern (Max. BCD-Hole), in |
Total Weight, lbm |
| DT3SRD | 1,111 [126] | 3,000 [339] | 8.10 | 10 | 74 | 1.968/4-20 |
2.756-(4)5/16-18 |
4.016-3/8-16 |
2.756-.344 |
2.756-(4).344 |
4.250-.406 |
19 |
| DT7SRD | 2,593 [293] | 7,000 [791] | 12.96 | 14 | 77 | 3.250-3/8-16 |
4.016-(4)3/8-16 |
5.000-1/2-13 |
3.750-.438 |
4.016-(4).406 |
5.000-.562 |
27 |
| DT12SRD | 4,444 [502] | 12,000 [1356] | 13.68 | 24 | 73 | 3.750-3/8-16 |
4.016-(4)3/8-16 |
6.496-3/4-10 |
4.750-.562 |
4.921-(4).562 |
6.496-.812 |
45 |
| DT21SRD | 7,778 [879] | 21,000 [2373] | 22.50 | 30 | 62 | 4.500-5/8-11 |
5.512-(4)5/8-11 |
7.000-3/4-10 |
5.500-.562 |
5.512-(4).688 |
7.750-.812 |
62 |
| DT36SRD | 13,333 [1506] | 36,000 [4067] | 19.00 | 36 | 105 | 6.000-1/2-13 |
6.496-(4)3/4-10 |
10.250-3/4-10 |
6.000-.563 |
6.496-(4).812 |
10.000-.688 |
126 |
| DT40SRD | 14,815 [1674] | 40,000 [4519] | 27.60 | 36 | 81 | 6.000-1/2-13 |
6.496-(4)3/4-10 |
10.250-3/4-10 |
6.000-.563 |
6.496-(4).812 |
10.000-.688 |
126 |
| DT50SRD | 18,519 [2092] | 50,000 [5649] | 60.80 | 36 | 46 | 6.000-1/2-13 |
6.496-(4)3/4-10 |
10.250-3/4-10 |
6.000-.563 |
6.496-(4).812 |
10.000-.688 |
154 |
| DT54SRD | 23,330 [2636] | 63,000 [7118] | 91.20 | 20 | 69 | 6.000-1/2-13 |
6.496-(4)3/4-10 |
10.250-3/4-10 |
6.000-.563 |
6.496-(4).812 |
10.000-.688 |
151 |
| DT90SRD | 33,333 [3766] | 90,000 [10,169] | 49.92 | 36 | 100 | 6.500-3/4-10 |
10.000-(8)5/8-11 |
11.750-3/4-10 |
8.500-.688 |
10.000-(8).688 |
10.750-.812 |
258 |
| DT140SRD | 51,852 [5859] | 140,000 [15,818] | 78.00 | 36 | 100 | 6.500-3/4-10 |
10.000-(8)5/8-11 |
11.750-3/4-10 |
8.500-.688 |
10.000-(8).688 |
10.750-.812 |
261 |
| DT200SRD | 74,074 [8369] | 200,000 [22,597] | 150.00 | 36 | 74 | 10.000-5/-11 |
14.016-(8)1-1/8-7 |
15.500-1-8 |
12.450-.688 |
14.016-(8)1.188 |
15.000-1.188 |
724 |
| DT260SRD | 96,296 [10,880] | 260,000 [29,376] | 264.00 | 30 | 66 | 10.000-5/-11 |
14.016-(8)1-1/8-7 |
15.500-1-8 |
12.450-.688 |
14.016-(8)1.188 |
15.000-1.188 |
764 |
Table footnotes
Handwheel rim efforts shown are calculated at unit maximum torque rating.
Handwheels listed are recommended sizes to produce full rated torque with rim effort listed.
Standard mounting patterns on all units are per ISO 5211 (UNC) specifications.
* Bolt circle diameter
