Dynatorque severe service gears
Quarter-turn stainless steel gear models SG, SS, and SSW
Overview
Dynatorque™ severe service gears are engineered for uncompromising reliability and performance in valves, dampers, and other quarter-turn systems that require a self-locking mechanism.
External components are fabricated from 316 stainless steel, providing exceptional resistance to chemicals, saltwater, and other corrosive environments. Stainless steel internal parts are also available for enhanced durability.
- Model SG: Stainless steel unit with stainless steel gearing
- Model SS: Stainless steel unit with ductile iron gearing
- Model SSW: Stainless steel unit with manganese bronze gearing
Applications
- Engineered for seamless integration with both manual and automated valves
- Used in a range of industries, including oil and gas, chemical processing, pulp and paper, and food manufacturing
- Equipped for dependable performance in challenging environments, such as marine, submerged, extreme-temperature, and sour conditions
Benefits
- Reliability and operational longevity through use of corrosion-resistant materials
- Lower total cost of ownership
Features
- Available in three sizes for a wide spectrum of operational requirements
- Designed in accordance with AWWA* criteria and ISO 9001 standards
- Customizable to meet specific mounting requirements for seamless integration
- Comprehensive portfolio of accessories, including valve locking devices and handwheels
- Stainless steel partial-stroke test device available for diagnostic testing even in the harshest environments
- Stainless steel declutchable or nondeclutchable manual override mechanisms available on request
- Spur and miter gear options available on request
* American Water Works Association
Tech Specs
| Model | Unit Weight, lbm | Max. Output Torque, lbf.in | Gear Ratio | Turns for 90° | Standard Bore, in | Standard Key Size, in | Standard Mounting Pattern (Quantity) and Size, in | Standard Mounting Pattern (Bolt Circle Diameter), in | Mechanical Advantage | Handwheel Size, in | Rim Pull, lbf |
| DT3SG | 8 | 3,000 | 30:1 | 7.5 | 1.000 | 0.250 | (4) 3/8–16 |
3.250 | 8.1 | 14 | 53 |
| DT7SG | 14 | 7,000 | 48:1 | 12 | 1.750 | 0.375 | (4) 1/2–13 |
5.000 | 12.96 | 18 | 60 |
| DT21SG | 33 | 21,000 | 60:1 | 15 | 2.500 | 0.500 | (4) 5/8–11 |
5.512 | 13.2 | 36 | 88 |
| DT3SS, DT3SSW | 8 | 3,000 | 30:1 | 7.5 | 1.000 | 0.250 | (4) 3/8–16 |
3.250 | 8.1 | 14 | 53 |
| DT7SS, DT7SSW | 14 | 10,000 | 48:1 | 12 | 1.750 | 0.375 | (4) 1/2–13 |
5.000 | 12.96 | 18 | 60 |
| DT21SS, DT21SSW | 33 | 21,000 | 60:1 | 15 | 2.500 | 0.500 | (4) 5/8–11 |
5.512 | 13.2 | 36 | 88 |
Notes
- Handwheels listed are recommended sizes to produce full rated torque with the rim effort listed.
- Bores, keyways, and mounting patterns listed are for SLB standard stock.
- Standard mounting patterns on the DT3SG, DT7SG, and DT21SG are four tapped holes, straddling the centerline at 45°.
