Maxtorque declutchable manual override gears
Save space and increase uptime
Overview
Maxtorque™ declutchable manual override gears can be used with pneumatic, hydraulic, or backdrivable electric actuators that have higher torque requirements. Compatible with both spring-return and double-acting actuators, they ensure reliable valve operation during maintenance, emergencies, and system failures. Their durable design and simple installation suit a range of industrial settings, including oil and gas, water treatment, and manufacturing.
These gears help you maintain valve control without sacrificing speed, safety, or accessibility. By combining a compact, direct-mount design with a highly efficient gearset, they reduce operator effort and provide dependable manual backup.
Maxtorque declutchable manual override gears keep valves operational when power, air, or control signals are unavailable.
Applications
- Emergency operation of automated valves during loss of power, instrument air, or control signal
- Commissioning and functional testing of valves where manual positioning is required before the actuator is placed in service
- Maintenance and troubleshooting by isolating a process or cycling a valve while the actuator is being serviced or has been removed
- Remote or difficult-to-access installations where a reliable and local manual backup is required
- Critical shutoff or isolation duties (e.g., emergency shutdown valves and block valves) where manual intervention may be required as a contingency
- Processes with intermittent automation requirements
Benefits
50%–75% decrease in the number of turns and rim pull
- Reduce effort
- Save space through compact design
- Increase uptime with reliable manual backup
- Enhance operations via greater safety and reliability
Features
- Highly efficient, double-enveloping bronze alloy worm gearset
- Torque tube design with robust lever engagement
- Direct mount to valve
- One-piece drive adapter
- Self-locking design
- Reduced handwheel size
- Suitable for spring-return and double-acting actuators
- Switchable worm gear that enables manual or automatic operation
- Standard and blank driver options that allow custom machining, with flexible installation
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 |
