Design:
The Limitorque V series bevel gearboxes offer an extensive range of thrust and torque outputs for multi-turn applications such as gate and globe valves, and slide gates. Applications for weatherproof or temporary submersion (IP67) service can be accommodated. Optional spur gear attachments reduce the input torque required, resulting in lower handwheel rim pull for opening and closing operations. The V series ductile iron housing provides strength and durability. The drive sleeve, bevel pinion shaft, and spur gear reduction shafts are roller bearing-supported, delivering high mechanical advantage and long life. Excellent sealing of mating surfaces provides reliable environmental protection. Ambient temperatures to -40°C are achieved with the standard lubricant.
Features and Benefits:
• Weatherproof and temporary submersion construction (IP67)
• Maintenance-free
• Input flanges machined in accordance with MSS SP-102, with keyed input shaft
• Splined, bronze alloy stem nut is removable from the drive sleeve for thread machining
• High strength bevel pinion and ring gear
• Roller bearing supported for high mechanical advantage
• Ductile iron enclosure
• Output thrust to 921 700 lbs (4100 kN)
• Output torque to 19 176 ft-lb (26 000 N-m)
• -40°C to 90°C (-40°F to 194°F) temperature range for continuous operation (options to -50°C)
Design:
The Limitorque SR series spur gearboxes offer an extensive range of thrust and torque outputs for multi-turn applications such as gate and globe valves, and slide gates. Applications for weatherproof or temporary submersion (IP67) service can be accommodated. For manual operation, spur gear attachments are available to reduce the input torque required, resulting in lower handwheel rim pull for opening and closing operations. The SR series ductile iron housing provides strength and durability. The
drive sleeve, spur pinion shaft, and spur gear reduction shafts are roller bearing supported, delivering high mechanical advantage and long life. Excellent sealing of mating surfaces provides reliable environmental protection. Ambient temperatures to -35°C are achieved with the standard lubricant.
Features and Benefits:
• Weatherproof and temporary submersion construction (IP67)
• Maintenance-free
• Input flanges machined in accordance with MSS SP-102, with keyed input shaft
• Mounting bases machined to MSS and ISO standards
• Splined, bronze alloy stem nut is removable from the drive sleeve for thread machining
• High strength spur pinion and ring gear
• Roller bearing supported for high mechanical advantage
• Ductile iron enclosure
• SR_H series for high thrust and torque applications
• Output thrust to 1 056 600 lbs (4700 kN)
• Output torque to 27 290 ft-lbs (37 000 Nm)
• -35°C to 90°C (-31°F to 194°F) temperature range for continuous operation (options to -50°C)
Design:
The Limitorque WG worm gearboxes are constructed for manual or motorized operation. With ductile iron housings, bearing supported shafts, and well-designed sealing, the WG stands up to the environmental challenges of weatherproof, submersible and buried service applications. Alternate input shaft assembly positions can be accomplished in the field due to the concentric housing design. The splined adapter is captive in the housing, eliminating the concerns over proper engagement of the adapter on the valve shaft. The range of spur gear reductions allows the WG to meet operating times for virtually any application. The WG meets AWWA C504 requirements for manual operation and, when motorized, meets AWWA C542 requirements. High-quality,
maintenance-free construction will provide years of dependable operation.
Features and Benefits:
• Meets AWWA C504 and C542 when motorized with MX, L120 or SMB actuators
• Lubricated for life
• Available for 360° operation
• Input flanges machined in accordance with MSS SP-102, with keyed input shaft
• Available for buried service and submersibility to IP 68
• Self-locking gearing
• High mechanical advantage
• Ductile iron enclosure
• 90° ±5° (adjustable) travel for quarter-turn applications
• Up to 326 000 ft-lb/442 000 N-m torque output
• Capability to withstand an overload of twice the torque rating
• Worm gears available in bronze or ductile iron
• -40°C to 90°C (-40°F to 194°F) temperature range for continuous operation (options to -50°C)
Design:
Limitorque’s HBC series worm gear operators excel in diverse applications. Their dependability has been proven in the most demanding situations, ranging from nuclear power plants, to large damper operations, to power plant flue gas desulphurization. Equipped with a handwheel, the HBC can be used to manually operate butterfly, plug, and ball valves. Combined with a Limitorque electric actuator (such as the SMB, L120, or MX), the HBC provides powerful and responsive motorized operation. These combination actuators provide a wide range of output speeds and output torques to 93,000 ft-lb (126,100 N m). HBC operators feature an optional 360° worm gear for use in guillotine damper and radial gate applications. Whether manual or motorized, depend on the HBC for easy valve control — even in tough installations.