RGS Ledeen Subsea Gears
Scotch yoke design for shallow-water and deepwater applications
Purpose-engineered for reliable valve actuation in the most challenging subsea environments.
Maxtorque subsea worm gears
With active and passive pressure compensation
Overview
Suitable for shallow-water, deepwater, and ultradeepwater projects
Maxtorque™ subsea worm gears are engineered for reliable valve actuation in challenging subsea environments. Based on a high-efficiency, double-enveloping worm gear design, they help reduce operating effort, support compact actuator packages, and deliver dependable torque transmission for critical flow control applications. Active and passive pressure compensation options, robust sealing, and subsea-ready interfaces make these gears suitable for shallow-water, deepwater, and ultradeepwater projects, where long-term reliability and predictable operation are essential.
Exterior (left) and cutaway (right) views of a Maxtorque subsea worm gear.
Applications
- Subsea valve actuation for critical flow control applications
- Shallow-water and deepwater installations requiring gears with active and passive pressure compensation
- ROV-operated valve systems with horizontal or vertical bucket interfaces
- Subsea production, pipeline, manifold, and check valve applications
Benefits
50% or more reduction in turns to close and rim pull
- Significantly increased tooth contact, load capacity, and lifespan
- Enhanced integrity with unique double O-ring sealing system
- Greater torque capacity and increased efficiency in a smaller package
- Custom packages available, with panels, indicators, hot stabs, flushing, handwheels, or special materials
Features
- High-efficiency, double-enveloping bronze alloy worm gearset
- Active and passive pressure compensation system up to 98 in [2,490 mm] tall
- Hyperbaric-tested design for deepwater requirements
- Horizontal and vertical ROV bucket options
- Manual operators, tethered handwheels, and tactile position indicators available as options
- Check valve lock open, special materials, and other custom solutions available
Tech Specs
| Model | Rated Torque, 1,000 Cycles, lbf.in | Rated Torque, 10,000 Cycles, lbf.in | Max. Standard Bore, in | Standard Mounting | Base Unit Ratio | Base Mechanical Advantage |
| LW1 | 38,000 | 30,400 | 2.75 | FA16 | 24.33 | 14.72 |
| LW2 | 75,000 | 60,000 | 3.25 | FA25 | 24.33 | 14.72 |
| LW3 | 100,000 | 80,000 | 4.00 | FA25 | 25.3 | 15.31 |
| BW1 | 200,000 | 160,000 | 5.50 | FA30 | 20.25 | 14.18 |
| BW2 | 400,000 | 320,000 | 6.50 | FA35 | 18.75 | 13.13 |
| BW3 | 700,000 | 560,000 | 9.00 | FA40 | 22.75 | 15.93 |
| BW4 | 1,000,000 | 800,000 | 9.00 | FA48 | 28.25 | 19.78 |
| MW1 | 1,500,000 | 1,200,000 | 10.00 | FA60 | 21.75 | 13.05 |
| MW2 | 2,250,000 | 1,800,000 | 10.00 | FA60 | 27.25 | 16.35 |
| MW3 | 3,000,000 | 2,400,000 | 10.00 | FA60 | 27.25 | 16.35 |
