Gear cast iron lug type butterfly valve

Introduction

The Ductile Iron Lug Type Butterfly Valve (Model BV117/118) is engineered for reliable and efficient flow control in water systems. Designed with a replaceable soft seat and precision-machined components, this valve is suitable for a wide range of applications requiring tight shut-off and low operating torque. Its lug-style configuration allows for easy installation and maintenance, even in dead-end service.

Working Principle

This butterfly valve operates by rotating the disc 90 degrees within the flow path. When the handle or actuator turns the valve stem, the disc rotates perpendicular or parallel to the flow, enabling precise regulation or complete shutoff. The soft seat ensures a tight seal, while the advanced surface finishing of the disc reduces friction and lowers the required torque for operation.

Technical Specifications

• ● Nominal Diameter (DN): DN50–DN600
• ● Pressure Rating: PN10 / PN16
• ● Temperature Range: 0℃ – 80℃
• ● Medium: Water
• ● Standards: Flanged; GB / ANSI / JIS
• ● Actuation Options: Manual (Worm Gear), Electric, Pneumatic

Key Features

• ● Replaceable soft seat design for easy maintenance.
• ● Bronze alloy and PTFE stem bushings for better sealing and lower torque.
• ● Aluminum Alloy Gearbox with IP67 waterproof rating.

Nominal Caliber Dimensions (Unit: mm)