Product Description

This wafer butterfly valve is fitted with a worm gear operator that multiplies hand torque into smooth, controlled disc movement. The self-locking worm gear holds the valve in any intermediate position, making it excellent for throttling and balancing duties as well as on/off service. The gear housing is fully sealed and weatherproof, with a position indicator on top for clear visual confirmation. Recommended for DN150 and above, or wherever lever operation is impractical.

Key Features & Advantages

• Self-locking worm gear holds any intermediate position
• Smooth, low-torque operation even at high differential pressure
• Sealed, weatherproof gearbox with position indicator
• Ideal for throttling and flow-balancing duty
• ISO 5211 flange allows retrofit to electric or pneumatic actuation
• Optional locking device for safety-critical installations

Applications

The Wafer Butterfly Valve with Worm Gear is widely applied in municipal water supply and drainage networks, water treatment plants, petrochemical and coal-chemical plants, power stations, heating and gas supply systems, HVAC and building services, sewage renovation projects and waste recycling integrated systems. It is also suited to demanding sectors such as floating production storage units, onshore exploration & production, deep-sea extraction, LNG terminals, oil & gas pipeline transmission, and loading & storage systems.

Quality & Certification

Every valve is manufactured under our ISO 9001:2015 quality management system. Products carry UK WRAS hygiene approval and European EN1074 certification, and all processes — casting, machining, spraying, assembly, testing, inspection and packaging — are controlled and traceable. Custom materials, pressure classes and actuation packages are available on request.