DFT Excalibur 8" Class 300 Spring-Assisted Check Valve

The DFT Excalibur is a high-performance, in-line, spring-assisted check valve designed for preventing backflow in demanding industrial applications. This 8-inch model, with ANSI Class 300 rating, features a nozzle-style design that ensures silent operation, minimal pressure drop, and reliable sealing under high-pressure conditions. Constructed with a WCB carbon steel body and 316 stainless steel trim, it offers excellent corrosion resistance and durability in environments like oil and gas, petrochemical, power generation, and water treatment systems. Key benefits include quick closure to prevent slamming, low cracking pressure, and compatibility with a wide range of fluids, including gases, liquids, and slurries. Compared to traditional swing check valves, the Excalibur reduces water hammer, extends service life, and requires less maintenance due to its axial flow path and spring mechanism. Drawbacks may include higher initial cost and the need for periodic spring inspection in extreme temperatures. This unused surplus unit shows minor surface rust from storage but remains fully functional, making it ideal for high-reliability piping systems where backflow prevention is critical.