Quarter Turn Worm Gearbox with Spur Gear – Hand Wheel Operation

Quarter Turn Worm Gearbox with Spur Gearbox – Hand-Wheel Operation

The Quarter Turn Worm Gearbox with Spur Gearbox – Hand-Wheel Operation is a high-torque, export-quality manual valve actuator designed for applications requiring very high torque output with reduced manual effort.

Manufactured by Relekon Automation, this gearbox combines a worm gear stage with a spur gear reduction stage, enabling smooth, controlled, and safe operation of large-size ball valves, butterfly valves, and plug valves in demanding industrial environments.

This configuration is ideal where standard worm gearboxes are insufficient to handle high torque loads while maintaining operator safety and ease of use.

Selection Chart: Quarter Turn Worm Gearbox with Spur Gearbox – Handwheel Operation (RASG Series)

Model	Torque (Nm)	Mech. Adv. (±10%)	Gear Ratio	Turns to Close	ISO 5211 Mounting	Handwheel (mm)	Weight (kg)
RASG – W5000	5000	50	90 : 1	66	F16	Ø500	30
RASG – W5500	5500	65	90 : 1	66	F16, F25	Ø500	40
RASG – W7000	7000	70	150 : 1	73	F16, F25	Ø600	50
RASG – W10000	10000	75	300 : 1	80	F25, F30	Ø600	75

Technical Specifications

Parameter	Specification
Operation Type	Manual – Hand-Wheel
Rotation Angle	90° (Quarter Turn)
Gear Mechanism	Worm Gear + Spur Gear Reduction
Self-Locking	Yes
Direction of Operation	Clockwise / Counter-clockwise
Efficiency	Optimized for high-torque manual operation

Torque Range

Key Features

Dual-stage worm + spur gearbox design for high torque
Self-locking mechanism prevents back-driving
Significantly reduced hand-wheel operating effort
Heavy-duty bearings-supported shaft assembly
Grease-lubricated system for long service life
Optional horizontal or vertical hand-wheel orientation
Marine-grade and severe-duty versions available

Lubrication

Environmental Conditions

Parameter	Rating
Ambient Temperature	-20°C to +80°C
Protection	Weather-resistant coating
Corrosion Protection	Epoxy / Powder Coated (Optional)
Indoor / Outdoor Use	Suitable for both

Applications

Large-size Ball Valves
High-Torque Butterfly Valves
Plug Valves
Damper & Flow Control Systems
Water & Wastewater Treatment Plants
Oil & Gas Pipelines
Chemical & Process Industries
Power Plants & Utilities

Optional Accessories

EXPORT & SUPPLY CAPABILITY

Relekon Automation supplies worm + spur gear valve gearboxes to customers across India, the Middle East (GCC), and European markets, supporting OEMs, EPC contractors, and industrial operators with export-ready solutions.

Export Highlights

Designed for high-temperature & outdoor GCC conditions
Compatible with international valve mounting standards
Export-grade packaging (wooden crates / pallets on request)
OEM branding & private labeling available
Pre-dispatch inspection & export documentation support

Certified for Quality & Global Trade

We are committed to excellence and international standards. These certifications validate our quality management and authorized trade operations.

ISO 9001:2015 Certified Officially certified by QRO for our Quality Management System. This ensures the highest standards in manufacturing and exporting standard and customized gearboxes, automation valves, and actuators.
Government Authorized Importer-Exporter (IEC) Registered with the Ministry of Commerce & Industry (DGFT), Government of India. This certification authorizes Relekon Automation to engage in seamless international import and export operations.