The NIBCO LD-2000-3 4" Butterfly Valve is a ductile iron lug butterfly valve engineered for precision flow control in commercial HVAC, mechanical, and industrial process applications. Built with a lead-free ductile iron body and an EPDM molded-in seat liner, this valve provides bi-directional dead-end service without the need for a downstream flange. Its bubble-tight shutoff is rated for 200 PSI non-shock cold working pressure, ensuring reliable performance in vacuum and liquid systems. The aluminum bronze disc and stainless steel stem with copper bushings offer superior corrosion resistance and durability in potable water and HVAC cycles. This 4-inch valve features an extended neck for insulation up to 2 inches and utilizes an internal stem-to-disc geometric drive, eliminating leak-prone pins or bolts in the waterway. Manual operation is streamlined via a lever-lock handle for quick, 90-degree quarter-turn engagement. Key Benefits: Lug-style design allows for dead-end service and bidirectional flow at full rated pressure. Ductile iron construction provides a high strength-to-weight ratio for demanding piping systems. Molded-in EPDM seat prevents liner movement and ensures consistent 200 PSI bubble-tight shutoff. Internal geometric drive improves flow characteristics by removing fasteners from the waterway. Stem/disc compatibility supports continuous service up to 225°F and intermittent peaks of 250°F. Common Questions: Can this valve be used for steam service? No, this NIBCO butterfly valve is specifically designed for liquid and vacuum applications and is not recommended for steam. Is it compatible with standard pipe flanges? Yes, the LD-2000-3 series is designed to meet MSS SP-67 and API 609 standards for compatibility with standard flange classes. Can it be automated? Yes, while supplied with a lever lock handle, it can be configured with manual gear operators or pneumatic/electric automation. Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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