Maxtorque thrust-based worm and spur gears

For valves requiring high torque and thrust.

Maxtorque™ thrust-based worm and spur gears provide a number of advantages. The dual-input worm gears are high-ratio, small-envelope solutions engineered for rising stem valve applications that require high thrust capacity, reliable torque transmission, and efficient manual operation. The dual-input arrangement enables operators to use a faster input for travel and a higher-mechanical-advantage input for seating or unseating under heavier torque conditions.

The motorized, high-thrust spur gears are engineered for rising stem valve applications that require high torque, high thrust, and reliable actuator-driven operation. The spur gear drivetrain uses heat-treated steel components and high-quality thrust bearings to deliver efficient, durable performance in demanding industrial service.

Worm gears

• Manual rising stem gate valves requiring high torque and thrust
• Applications requiring fewer turns to close and lower rim pull to improve efficiency
• Large valves needing compact gears to reduce size and piping loads
• New builds or retrofits needing mounting and stem cover adaptation

Spur gears

• Motorized rising stem valves requiring high torque and thrust
• Actuator-mounted multiturn valves requiring efficient mechanical advantage
• High-load installations needing low-profile gearing
• Projects needing custom mounting and stem cover adaptation

Worm gears

• Faster manual operation: Decrease closing turns by up to 4× versus conventional designs
• Reduced operator effort: Lower input effort via efficient worm gearing and improved ergonomics
• Compact installation: Fit space-limited assemblies because of small-envelope design
• Cost-effective alternative: Provide smaller, stronger, and more economical option than large bevel gears

Spur gears

• Reliable motorized performance: Ensure dependable actuator-driven operation
• High load capability: Handle high torque and thrust
• Low-profile integration: Deliver compact, high-torque gearing
• Application flexibility: Adapt to actuator, valve, mounting, and stem cover requirements
• Readiness for demanding environments: Available in high-temperature packages for harsh conditions

Worm gears

• Torque capability 120,000–1,200,000 lbf.in [13,558–135,582 N.m] 
• Thrust capability up to 1,420,000 lbf [6,316,475 N]
• Highly efficient double-enveloping bronze alloy worm gearset
• High-quality thrust bearings for demanding rising stem loads
• Dual-input configuration for fast travel and high-torque seating or unseating
• Easy accommodation of mounting adaptation and stem covers

Spur gears

• Torque capability 60,000–1,200,000 lbf.in [6,779–135,582 N.m]
• Thrust capability up to 1,420,000 lbf [6,316,475 N]
• Highly efficient spur gear drivetrain using heat-treated steel
• High-quality thrust bearings for reliable rising stem performance
• Double-idler gearset available for high torque with a low-profile arrangement
• Application-engineered configuration for motorized valve packages
• Easy accommodation of mounting adaptation and stem covers