Dynatorque SD

Declutchable manual override

Overview

Dynatorque SD™ declutchable manual overrides are 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
Compatibility with both double-acting and spring-return actuators
Nine frame and spur combinations that provide output torque ranging from 3,000 to 140,000 lbf.in [340 to 15,815 N.m]
One-handed declutch mechanism
Suitable for all handwheel applications with chainwheel adapters

Tech Specs

Model	Double-Acting Actuators: Maximum Valve Torque, lbf.in [N.m]	Spring-Return Actuators: Spring-End Torque, lbf.in [N.m]	Override Maximum 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 (Standard BCD-Tap), in	Housing (Bottom) Mounting Pattern (Max. BCD-Tap), in	Cover (Top) Mounting Pattern (Min. BCD-Hole), in	Cover (Top) Mounting Pattern (Standard BCD-Hole), in	Cover (Top) Mounting Pattern (Max. BCD-Hole), in	Total Weight, lbm
DT3SD	2,400 [271]	1,100 [124]	3,000 [339]	8.10	10	74	1.968-1/4-20	2.756-(4)5/16-18	4.016-3/8-16	2.756-.344	2.756-(4).344	4.250-.406	20
DT7SD	5,600 [633]	2,600 [294]	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	28
DT12SD	9,600 [1,085]	4,550 [503]	12,000 [1,356]	13.68	24	73	3.750-3/8-16	4.921-(4)1/2-13	6.496-3/4-10	4.750-.562	4.921-(4).562	6.496-.812	45
DT21SD	16,800 [1,898]	7,775 [879]	21,000 [2,373]	13.20	30	106	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
DT36SD	28,800 [3,254]	13,330 [1,506]	36,000 [4,067]	13.25	36	151	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	130
DT40SD	32,000 [3,616]	14,815 [1,674]	40,000 [4,519]	19.84	36	112	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	130
DT50SD	40,000 [4,520]	18,520 [2,093]	50,000 [5,649]	34.45	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	168
DT54SD	50,400 [5,695]	23,330 [2,636]	63,000 [7,118]	51.68	30	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	163
DT90SD	72,000 [8,136]	33,325 [3,766]	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	268
DT140SD	112,000 [12,655]	51,850 [5,859]	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	271

Notes

^*Bolt circle diameter
Handwheel rim efforts shown are calculated at unit maximum torque rating.
DT50SD and DT90SD have a 4:1 spur assist; DT54SD and DT140SD have a 6:1 spur assist.
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.