Motorized Butterfly Valve

Description and Working Principle

Key Components

• Valve Body: Connects to the pipeline, made from materials like cast iron, stainless steel, or carbon steel.
• Disc: The flow-controlling element, often stainless steel or nickel-plated.
• Shaft/Stem: Connects the disc to the actuator and enables rotation.
• Sealing: Typically rubber, PTFE, or metal seats to prevent leakage when closed.
• Actuator: Electric motor unit that automatically rotates the valve disc. Can include limit switches, positioners, and feedback systems for precise control.

Types of Motorized Butterfly Valves

• Wafer Type: Fits between two flanges, suitable for most pipeline systems.
• Lug Type: Independent flanged connections, allows isolation on one side of the pipeline.
• Double Flanged Type: Bolted to flanges on both sides, suitable for heavy-duty large pipelines.
• High-Performance Valves: Metal-seated or triple-offset designs for high-pressure or high-temperature applications.

Applications

• Water and wastewater systems
• HVAC and building services for air and chilled water distribution
• Chemical and process industries
• Food and beverage pipelines
• Power generation plants for cooling water and process flow control
  They are suitable for on/off and throttling purposes, especially in automated or remote-controlled systems.

Advantages

• Compact, lightweight, and cost-effective for large pipelines.
• Quick quarter-turn operation reduces wear and response time.
• Remote automation reduces manual labor and enhances system control.
• Can be modulated for precise flow control when coupled with proper actuators and control systems.