- 1 - 7th edition No. SS2-8110-3100 Butterfly Control Valves Model VBL OVERVIEW Model VBL Butterfly Control Valves are mainly used for the control of fluids flowing in large volume at low differential pressure. The unit offers added advantages such as simple structure and low cost. SPECIFICATIONS Body Type Wafer-type butterfly valve Nominal size 80 to 1000 mm Pressure rating JIS 2K, 5K, 10K (For relations with valve sizes, refer to Table 2) End connection Wafer type Material Cast iron (FC 200), Carbon steel (SCPH2), Stainless steel (SCS13, 14) Packing PTFE yarn packing Note) PTFE: Polytetrafluoroethylene Trim Material Valve plug . Vane............. Cast iron (FC 200) Carbon steel (SCPH 2) Stainless steel (SCS 13, SCS 14) . Valve stem....Stainless steel (SUS304 or SUS316) . Plain metal....Bronze (BC) PTFE Stainless steel (SUS304 or SUS316 with hard chrom plating, Kanigen plating, or stellite armoring) Note) For fluid operating temperatur renges, refer to Table 3. Actuator Type Spring type G-O-Motor (direct action) Spring range 20 to 98 kPa {0.2 to 1.0 kgf/cm2} Supply pressure 140 kPa {1.4 kgf/cm2} Air connection Rc1/4 or 1/4NPT internal thread Ambient temperature 0 to +70°C Valve action Air-to-close or air-to-open (Valve action is detemined by the position of key groove provided in the connecting part between the actuator and the stem.) Rotating angle of vane 0 to + 60° 4 3 Specifications are subject to change without notice. “This product is designed for general industrial use.”