Ductile Iron Wafer Pattern Butterfly Valve Low Torque NBR

This ductile iron wafer pattern butterfly valve is engineered for smooth operation, reliable sealing, and efficient flow control across a wide range of industrial applications. Designed with a low-torque mechanism and an NBR (Buna N) liner, it delivers consistent performance with reduced effort, ideal for manual or automated operation. Its wafer-style body provides a compact, easy-to-install design that fits seamlessly into existing pipework.

Technical Data

Body Material: Epoxy-coated ductile iron for high strength, impact resistance, and protection against corrosion.
Disc Material: 316 stainless steel, offering excellent durability and corrosion resistance for use in water and process systems.
Liner/Seat Material: NBR (Buna N) elastomer, providing a reliable, flexible seal suitable for water, oil, and many neutral fluids.
Pattern / Flange Compatibility: Wafer pattern body suitable for installation between PN10, PN16, or ANSI 150 flanges.
Mounting Standard: ISO 5211 top mounting pad for direct gearbox or actuator installation, enabling easy automation.
Pressure Rating: PN10 (10 bar) maximum working pressure under normal service conditions.
Temperature Range: 10 °C to +100 °C (depending on media and operating conditions).
Low Torque Design: Optimised disc and liner geometry reduce operating torque, resulting in smoother control and the potential for smaller, more economical actuators.
Size Range: Typically available in 2", 2½", 3", 4", 5", 6", and 8".

Why This Valve Stands Out

Effortless operation: The low-torque design provides easy manual handling and reduced actuator load, enhancing efficiency and extending service life.
Compact installation: The wafer body fits neatly between flanges, saving space and simplifying system layout compared to full-body designs.
Reliable sealing: The NBR liner ensures a strong, consistent seal for water and non-aggressive fluids, maintaining leak-free operation even under fluctuating pressures.
Durable and dependable: The ductile iron body and stainless steel disc combination offers robust mechanical integrity and corrosion resistance.
Automation ready: ISO 5211 mounting makes it simple to add electric or pneumatic actuators without requiring any major modifications.

Installation and Application Tips

• Verify that the flange standard and bolt pattern match your system before installation.
• Use even bolt torque when tightening to prevent body distortion and ensure a uniform seal.
• Check that the process fluid is compatible with NBR, ideal for water, air, oils, and neutral fluids, but not for strong acids, solvents, or hydrocarbons.
• Align the pipework properly to avoid unnecessary stress on the valve body or sealing surfaces.
• When using actuators, ensure torque ratings are appropriate for valve size and pressure.
• Inspect the liner and disc periodically for signs of wear or contamination, especially in systems with frequent cycling or suspended particles.

The Ductile Iron Wafer Pattern Butterfly Valve Low Torque NBR is a versatile, durable, and low-maintenance valve solution. It combines ease of operation with robust construction, making it perfect for industrial water systems, HVAC circuits, and process pipelines requiring dependable sealing and efficient flow control.