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Rotork IW Series worm gearboxes are designed for manual or motorized operation of quarter-turn valves such as butterfly, ball, and plug valves. They provide high torque multiplication with a robust cast iron or ductile iron housing, making them suitable for heavy-duty applications in demanding industrial environments.
Technical Specifications
Parameter
Specification
Type
Worm Gearbox
Torque Range
Up to 500,000 Nm (model dependent)
Ratio
Various reduction ratios available
Rotation
90° quarter-turn
Housing Material
Cast iron / Ductile iron
Protection Rating
IP67 / IP68 (weatherproof / submersible options)
Temperature Range
–40 °C to +120 °C (model dependent)
Mounting
ISO 5210 / 5211 standard
Application Industry
Water and wastewater treatment
Oil & gas pipelines
Power generation
Chemical processing
Marine and offshore
Common Problems & Solutions
Problem: High operating torque on large valves → Solution: High torque multiplication worm gear design
Problem: Environmental exposure → Solution: IP67/IP68 weatherproof and submersible options