This series butterfly valve used worm drive ,operation of the LRT and self-locking function. Application of advanced structural design of three eccentric and flexible ring of tiny elastic deformation characteristics , the use of advanced technology and methods for process equipment manufacturing , to ensure accuracy of parts and assembly accuracy .Ensuring reliable seal a lasting pay coincide with the total elimination of the sealing surface of the interference with the mill loss . Therefore , the switch resistance small , reliable sealing , sealing surface wear small , whole working life long . The products are widely used in metallurgical , petrochemical , oil refining , to the drainage works and other sectors.
1.The valve design and manufacture of API609 standards 2.ANSI B16.5 by connecting flange ASME B16.47 standards 3.Inspection and test valves by API598 standards