Fitvalf Upvc Flanged Butterfly valves are in accordance with the following International standards. * DIN as metric system ; ASTM as INCH system. - There is the possibility of locking the valve for easy control with the lever safety. - Because of they are lightly , they are easier to transport and install than metal valves. - In order to control the fluidity and flow of water in the installation, a durable butterfly type water valve is produced by U-PVC , the actuator and U-PVC valves are presented as together. - It starts from 63mm and continues up to 315mm. The operating pressure between 63mm - 140mm is PN16, the operating pressure between 160mm -315mm is PN10. These valves are sold with flanges , nuts and bolts as 1 full set.