--- title: Excalibur® NAB Valve Cut Sheet | DFT Inc. | DFT® Inc description: The DFT Excalibur® NAB is an axial flow, non-slam check valve that was specifically designed for the harshest industrial applications. The valve’s nickel-aluminum bronze (NAB) body is highly durable and is able to withstand any salt or brackish water environments. --- [![DFT Valves, Inc](https://industrial.dft-valves.com/hubfs/new-dft/dft-logo.png)](https://www.dft-valves.com/) [![](https://industrial.dft-valves.com/hubfs/new-dft/email-off.png)](mailto:dft@dft-valves.com) [800.206.4013](tel:8002064013) [Find My Check Valve](https://catalog.dft-valves.com/advanced3/in-line-check-valves) Close # Check Valve Cut Sheets ## Excalibur® NAB Check Valve Cut Sheet The DFT Excalibur® NAB is an axial flow, non-slam check valve that was specifically designed for the harshest industrial applications. The valve’s nickel-aluminum bronze (NAB) body is highly durable and is able to withstand any salt or brackish water environments. In addition to providing exceptional corrosion resistance, the Excalibur® NAB can reduce the effects of common problems associated with water hammer. Available in ASME Classes 150 and 300 and line sizes ranging from 2” to 24”, Excalibur® NAB check valves offer versatility to several applications. This axial flow, nozzle style check valve features spring-assisted silent closing and tight shutoff, and is simple to maintain. The Excalibur® NAB valve has a two-piece body, a protected spring, flat face flanged ends, and a center/dual-guided stem. Though the standard material for this check valve is nickel-aluminum bronze, other materials are available; an Inconel® X-750 spring is available, as well as Monel®, Stellite®, stainless steel, and duplex stainless steel trim options. Additional valve options include a soft seat, custom sizing low flow, and severe service trim. Also, valve ends can be raised face or butt or flanged x butt weld. The Excalibur® NAB check valve meets the requirements of ASME’s B16.10 standard for valve face-to-face dimensions. Learn more about this heavy-duty control valve by [contacting DFT](https://industrial.dft-valves.com/contact-dft-dft-inc) today. [![Excalibur® NAB Check Valve Cut Sheet](https://industrial.dft-valves.com/hs-fs/hubfs/DFT-%20NAB%20check%20valves.png?width=243&height=250&name=DFT-%20NAB%20check%20valves.png "Excalibur® NAB Check Valve Cut Sheet")](https://industrial.dft-valves.com/hubfs/DFT-%20NAB%20check%20valves.png) ## Feature Case Studies [![Power Generation Boiler Feed Pump Applications](https://industrial.dft-valves.com/hs-fs/hubfs/A91w7w2xj_utn296_lrw.jpg?width=366&height=253&name=A91w7w2xj_utn296_lrw.jpg "Power Generation Boiler Feed Pump Applications") Power Generation Boiler Feed Pump Applications The DFT® Model WLC® BF Severe Duty Check Valves See Full Case Study](https://ffa0e4.p3cdn1.secureserver.net/wp-content/uploads/DFT-Power-Generation-Boiler-Feed-Pump-AppSuccess-14-SevereServ-012722.pdf) [![ROI of Reliable DFT® Check Valves](https://industrial.dft-valves.com/hs-fs/hubfs/Layer-13.jpg?width=366&height=253&name=Layer-13.jpg "ROI of Reliable DFT® Check Valves") ROI of Reliable DFT® Check Valves The DFT® Model Check Valves See Full Case Study](https://www.dft-valves.com/cooling-tower-piping-system-case-study) [![Solving Water Hammer Issues](https://industrial.dft-valves.com/hs-fs/hubfs/Layer-14.jpg?width=366&height=253&name=Layer-14.jpg "Solving Water Hammer Issues") Solving Water Hammer Issues The DFT® Model Excalibur® Check Valves See Full Case Study](https://www.dft-valves.com/solving-water-hammer-issues-in-paper-mills/) [View All Case Studies](https://www.dft-valves.com/case-studies/) ## Contact Us DFT® Inc 140 Sheree Blvd. PO Box 566 Exton, PA 19341-0566 [dft@dft-valves.com](mailto:dft@dft-valves.com) ![DFT Inc](https://industrial.dft-valves.com/hubfs/new-dft/dft-logo.png "DFT Inc") [![Facebook](https://industrial.dft-valves.com/hubfs/new-dft/fbf-off.png "Facebook")](https://www.facebook.com/pages/DFT-Valves/255252777885250) [![Twitter](https://industrial.dft-valves.com/hubfs/new-dft/twitterf-off.png "Twitter")](https://twitter.com/DFTValves) [![LinkedIn](https://industrial.dft-valves.com/hubfs/new-dft/linkedinf-off.png "LinkedIn")](https://www.linkedin.com/company/2681090) [![YouTube](https://industrial.dft-valves.com/hubfs/new-dft/youtubef-off.png "YouTube")](https://www.youtube.com/channel/UCBAiEUvgPsAJTnd8LmRKfVg/feed) ![WTC](https://industrial.dft-valves.com/hubfs/img/world-trade-logo.png "WTC") [![Thomas Supplier](https://img.thomascdn.com/badges/shield-tier-v-sm.png?cid=10110760 "Thomas Supplier")](https://www.thomasnet.com/profile/10110760?src=tnbadge) © Copyright 2026 DFT® Inc [Privacy](https://www.dft-valves.com/privacy-policy)   |   [Sitemap](https://www.dft-valves.com/sitemap/)   |   Website built by [Thomas Marketing Services](https://business.thomasnet.com/) ![](http://www.webtraxs.com/webtraxs.php?id=dft-valves&st=img)