Can the 0806xxxxNL Series brass swing checks valves be used for diesel fuel applications?

From a chemical compatibility standpoint, the answer is yeas! Brass and Diesel fuel are chemically compatible based on the chemical compatibility charts. So, from strictly a material suitability standpoint they will be ok. NOTE: These charts are to be used a guide only!

IMPORTANT NOTICE: The end user / installer assumes the sole responsibility to ensure that the product meets all the applicable national and local codes and regulations for the project / application in which the product will be used. The AHJ (authority Having Jurisdiction) has the final say as to whether a product or material is suitable for the project /application.

The link to the Boshart Knowledge Base site can be used to find links to information regarding chemical compatibility of a wide range of materials.

https://support.boshart.com/where-can-i-find-chemical-compatibility-information

The link below will take you to The Cole-Parmer Chemical Compatibility site. The search result is copied below.

https://www.coleparmer.ca/chemical-resistance?PubID=ZA&persist=True&ip=no&gclid=CjwKCAjw4c-ZBhAEEiwAZ105RfinXjA6MIT-bwWKy_LhNnOT9nK-i6SjS9FsoLRFtlenCSj1KTChBxoCm8oQAvD_BwE

WARNING: The information in chemical compatibility chart has been supplied to Cole-Parmer by other reputable sources and is to be used ONLY as a guide in selecting equipment for appropriate chemical compatibility. Before permanent installation, test the equipment with the chemicals and under the specific conditions of your application.

Ratings of chemical behavior listed in this chart apply at a 48-hr exposure period. Cole-Parmer has no knowledge of possible effects beyond this period. Cole-Parmer does not warrant (neither express nor implied) that the information in this chart is accurate or complete or that any material is suitable for any purpose.

DANGER: Variations in chemical behavior during handling due to factors such as temperature, pressure, and concentrations can cause equipment to fail, even though it passed an initial test.

SERIOUS INJURY MAY RESULT: Use suitable guards and/or personal protections when handling chemicals