Control Butterfly Valve

Features

• Precise Modulation: Continuous partial rotation allows highly accurate flow modulation.
• Eccentric Design: Double or triple offset separates the disc from the seat during opening, reducing wear and extending service life.
• Optimized Response: Disc profile optimized for minimal hysteresis and agile control response.
• Low Operating Torque: Requires low operating torque, allowing use of more compact and efficient actuators.
• Seat Options: Metallic or PTFE seats selectable according to service requirements and temperature.
• Durability in Frequent Cycles: Robust construction supports frequent operation cycles with minimal material fatigue.
• System Integration: Easily integrates with positioners and Distributed Control Systems (DCS).
• Fast Response: Quickly responds to control signal changes, crucial for dynamic processes.
• Fluid Versatility: Compatible with water, gases, and fluids containing suspended particles.
• Connection Configurations: Available in wafer, lug, or flanged configurations.

Body Design

• Primarily manufactured in wafer, lug, and flanged versions, with compact, lightweight construction facilitating installation even in large-diameter piping.
• Available in concentric configurations for standard services and double or triple offset designs for demanding control applications, reducing friction and seat wear.
• Compliant with API 609 and EN 593 standards.
• Size range: DN 50 to DN 2000.
• Pressure ratings: Up to ANSI 600, depending on design and material.

Construction Materials

• Body Materials: Ductile Iron; Carbon Steel (A216 WCB, A105); Stainless Steel (304, 316); Duplex and Super Duplex Alloys; Special Alloys (Inconel, Hastelloy).
• Trim Materials (Internal): Disc in stainless steel, aluminum-bronze, or coated with Stellite, Inconel, or other hard materials; Metallic seats (triple-offset) or soft seats (PTFE, elastomers) depending on application; Shaft in hardened stainless steel or special alloys for higher wear resistance; Packing and seals in materials resistant to temperature, pressure, and fluid chemistry (graphite, Viton, PTFE, etc.).

Trim Design

• Profiled control disc optimized for improved response and stability in modulation applications.
• In eccentric designs, the disc separates from the seat during opening, reducing contact and enabling precise control.
• Seats can be metallic for severe service or soft materials (PTFE, elastomers) for enhanced tightness in standard service.
• Shaft designed to minimize hysteresis and withstand frequent cycles with minimal deformation.

Applications

• Flow Control: Essential in power plants, chemical industry, and mining.
• Gas Regulation: Critical for regulating air and process gases.
• Water Treatment: Applications in water treatment plants handling suspended solids.