DILV two-way pressure flange butterfly valve DS643H-10C, the perfect combination of innovative technology and exquisite technology! This type of butterfly valve is made of cast steel and has a bi-directional pressure design to ensure stable operation under various high pressure conditions. Unique flange connection, reliable sealing, easy to operate. Widely used in chemical, petroleum and other industries. Deli valve, with leading design concepts and strict quality control, provides efficient and safe solutions for your fluid control.