
Ordinary Temperature Cast OEM 1''~3'' NPT Di Ductile Iron Ball Check Valve. Anti-Backflow Performance: Ensures one-way flow to avoid backflow pollution or equipment damage in high-pressure environments. NPT Thread Connection: Features American standard taper pipe thread for secure and reliable pipeline system integration. OEM/ODM Customization: Provides full customization services including design, casting, processing, and trademark customization. Material Certification: Each product comes with a dedicated material report and corresponding furnace number. Technical Support: Dedicated technical department with 7 engineers provides professional answers and assembly drawings. Export Experience: Over 20 years of export experience with products sold to Europe, America, and Southeast Asia. Fast Delivery: Regular products take about 25 days, while customized products require 30-35 days.