Handwheels
Suited for Cameron products
6- to 48-in sizes, many in recessed or flat versions.
Dynatorque 180 memory-stop worm gears
Help a valve or damper return to the same predetermined position when reopened
Overview
For controlled travel up to 180°
Dynatorque™ 180 memory-stop worm gears are designed for valve, damper, and rotary applications that require precise, repeatable positioning beyond standard quarter-turn operation. The infinitely adjustable memory-stop device for controlled travel up to 180° helps return the valve or damper to a predetermined position. The traveling nut module supports accurate travel control and repeatable operation.
Built on a trusted platform, these worm gears combine self-locking performance, robust construction, and mounting flexibility. Standard units are available with common mounting interface dimensions, while custom-machined configurations can be supplied with bores, keyways, and bolt patterns to support direct valve integration.
Applications
- Valves and dampers requiring controlled travel up to 180°
- Nonrising stem valve applications where repeatable multiturn operation is required without thrust loading
- Process control installations that require a self-locking mechanical gear operator
- Applications where the valve or damper must return consistently to a predetermined set point
- Standard and low-temperature service environments, with additional configurations available for specific application requirements
Benefits
- Reliable self-locking performance: Worm gear construction helps prevent back-driving in demanding rotary applications
- Flexible integration: Standard and custom mounting options support alignment with valve topworks and customer-specific requirements
- Durable construction: Cast gray iron or ductile iron construction promotes dependable service in industrial environments
- Application versatility: Availability of multiple model sizes and torque ranges supports a broad envelope of valve and damper requirements
Features
- Traveling nut module for repeatable valve travel to a predetermined set point
- Standard mounting dimensions or custom-machined configurations available
- Precision-machined bores, keyways, and bolt patterns available for direct valve mounting
Tech Specs
Specifications
| Model | Unit Weight, lbm | Max. Output Torque, lbf.in | Gear Ratio | Turns for 180° | 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 | Approx. Rim Pull, lbf |
| DT3-180 | 7 | 4,500 | 30:1 | 15 | 1.000 | 0.250 | (4) 3/8–16 |
3.250 | 8.10 | 14 | 80 |
| DT8-180 | 19 | 8,000 | 30:1 | 15 | 1.750 | 0.375 | (4) 1/2–13 |
5.000 | 8.10 | 24 | 82 |
| DT12-180 | 26 | 16,000 | 57:1 | 28.5 | 2.000 | 0.375 | (4) 1/2–13 |
4.921 | 13.68 | 30 | 78 |
| DT21-180 | 34 | 26,000 | 60:1 | 30 | 2.500 | 0.500 | (4) 5/8–11 |
5.512 | 22.50 | 30 | 77 |
| DT36-180 | 78 | 36,000 | 53:1 | 26.5 | 3.250 | 0.750 | (4) 3/4–10 |
6.496 | 19.00 | 36 | 105 |
| DT50-180* | 105 | 50,000 | 212:1 | 106 | 3.250 | 0.750 | (4) 3/4–10 |
6.496 | 60.80 | 20 | 80 |
| DT54-180* | 108 | 63,000 | 318:1 | 159 | 3.250 | 0.750 | (4) 3/4–10 |
6.496 | 91.20 | 18 | 77 |
* Units with spur assist
Notes
- Handwheels listed are recommended sizes to produce full rated torque with the rim effort listed.
- Bores, keyways, and mounting patterns listed are per SLB standards.
- Standard mounting patterns on the DT3-180 through DT54-180 are 4 tapped holes straddling the centerline at 45°.
