- 1 - 6th edition No. SS2-8110-3110 Medium-or Heavy-Duty Type Butterfly Control Valves Model VBM, VBH OVERVIEW Butterfly Control Valves are normally used for the control of fluids flowing in large volume at low differential pressure. The unit offers added advantages in that it is low priced especially for large sizes, space required for mounting is small, and it is particularly efficient for controlling liquids containing slurries. SPECIFICATIONS Body Type Wafer-type butterfly valve Material Cast iron (FC 200), Carbon steel (SCPH 2), Stainless steel (SCS 13, 14) Nominal size 100 to 550 mm Pressure rating JIS 10K End connection Wafer type 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 chrome plating) Note) For body/trim material combinations and operating temperature, refer to Table 3. Actuator Type Spring type (Direct action) or springless-type piston actuator (Direct or reverse action) Spring range 20 to 98 kPa {0.2 to 1.0 kgf/cm2} Supply pressure . Spring type : 140 kPa {1.4 kgf/cm2} . Springless type : 200 kPa {2.0 kgf/cm2} Air connection Rc1/4 or 1/4NPT internal thread Ambient temperature 0 to +70°C Valve action Valve action (direct or reverse) of spring type is determined by position of the key groove provided in the connecting port between the actuator and the stem. With springless type, actuator rotation (direct or reverse) determines valve action. Rotating angle of vane 0 to + 60° 4 4 Specifications are subject to change without notice. “This product is designed for general industrial use.”