4 Inch Butterfly Valve | Durable Wafer & Lug Types, Reliable Flow Control

4 Inch Butterfly Valve: High-Performance Flow Control for Marine & Industrial Systems

Our 4 Inch Butterfly Valve is designed to satisfy the demanding needs of marine and industrial environments, offering a lightweight, space-saving solution for fluid isolation and modulation. This valve offers bubble-tight shutdown and minimal pressure drop whether you are operating ballast systems or industrial process lines.

The valve is offered in a wafer and lug style and has an aerodynamic disc form to minimize turbulence and wear. The concentric design is straightforward to maintain and performs consistently in high cycle settings.

Technical Specifications

Product Features:

• Compatible with industry-standard flanges for wafer or lug-style mounting
• You can use a manual or electric actuator to turn it a quarter turn
• Pressure ratings of up to several hundred PSI are good for systems with modest pressure
• The temperature resistance depends on the materials used for the body and seat. It is usually between -40°F and 450°F
• Seals manufactured of EPDM, Viton, or PTFE to work with different types of media
• Sealing that works in both directions so that flow can go in either direction

These valves are great for isolating and throttling in pipeline systems since they are easy to use, don’t lose much pressure, and don’t need much maintenance.

Pro Tips for Longevity:

1. Installation Orientation: Always install the valve in the open position to prevent seat distortion during flange welding or tightening.
2. Disc Clearance: Before final torqueing, rotate the disc to the full open position to ensure it doesn’t strike the inner diameter of the adjacent piping.
3. Marine Maintenance: For seawater service, I highly recommend the Nylon-coated disc variant. It significantly reduces barnacle buildup on the sealing surface, extending seat life by up to 40%.
4. Grease the Stem: Even maintenance-free valves benefit from a dab of marine-grade lithium grease on the top stem once a year to prevent seizing in humid engine rooms.