Bettis CW Series Quarter-turn Worm Gear Operator
A quarter-turn worm gear designed for chainwheel operation. With optimized lengths of input shafts supported in bearings minimizing cantilever load of the chainwheel, chain guard, and chain.
The Bettis™ CW Series Quarter-turn Worm Gear Operator, engineered by Emerson, is a rugged and efficient manual gearbox designed for quarter-turn valve applications such as ball, butterfly, and plug valves. It provides precise, high-torque manual operation for both on-off and modulating control, offering smooth and reliable performance across a wide range of industrial environments.
Built for durability and versatility, the Bettis CW Series features a worm-and-wheel gearing mechanism that ensures high mechanical advantage, making valve operation easy even under demanding torque conditions. Its self-locking design prevents unintended valve movement, ensuring safe and secure positioning at all times.
With robust cast-iron or ductile-iron housing, fully enclosed, permanently lubricated gears, and IP67-rated sealing, the Bettis CW Series is ideal for harsh environments, including offshore, marine, oil and gas, and process industries. The operator can be used for direct manual control or as a manual override in conjunction with pneumatic, hydraulic, or electric actuators.
Technical Specification of Bettis CW Series Quarter-turn Worm Gear Operator
- Power Source
- Manual
- Product Type
- Manual Gear Operator
- Actuation
- Quarter-turn
- Certifications
- Enclosure sealed IP67 (IP68 available upon request)
- Valve Type
- Ball, butterfly, plug, triple offset
Feature of Bettis CW Series Quarter-turn Worm Gear Operator
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Type: Quarter-turn (90°) worm gear manual operator
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Torque Range: Broad selection up to several thousand Nm for all valve sizes
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Design: Self-locking worm gear ensures stable valve position
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Material: High-strength cast-iron or ductile-iron housing
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Operation: Smooth, low-effort handwheel or wrench interface
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Lubrication: Fully enclosed and permanently lubricated for maintenance-free operation
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Sealing: Weatherproof and dust-tight (IP67 rated)
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Mounting: ISO 5211 and MSS SP-101 compliant flanges for universal valve compatibility
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Optional Features: Mechanical position indicators, locking devices, and declutchable versions for actuator integration