69 ● 15mm(1/2inch) ･ 　 20mm(3/4inch) ● 25mm(1inch) − 100mm(4inch) AV CONSTANT FLOW VALVE keeps the flow rate constant. FLOW FLOW FLOW FLOW Type-A 25mm(1inch) - 80mm(3inch) Type-B 15mm(1/2inch) - 80mm(3inch) Type-C 15mm(1/2inch) - 100mm(4inch) Type-D 80mm(3inch) - 100mm(4inch) The fluid flow path is suitable for semi-conductor industry. (Ultra pure water line) The flow rate setting range is large (Covers small and large flow rates) The range of working differential pressure is large (For lines with large pressure differential between upstream ＆ downstream) A large flow rate can be set CONSTANT FLOW VALVE 15mm - 100mm(1/2inch - 4inch) FEATURES ■ High Accuracy The CONSTANT FLOW VALVE accurately controls the flow rate to within ±6％ of the full scale value and offers high rangeability (set value for maximum flow rate/set value for minimum flow rate). ■ Flexible Flow Rate Using the handle, the flow rate setting on the valve can be changed at will. The CONSTANT FLOW VALVE can also be used as shut off valve because it cmpletely shuts off the flow. ■ Opening Degree Indicator The CONSTANT FLOW VALVE has indicator showing opening degree which reads the flow rate (m3/hour). ■ High Durability and Resistance to Chemicals The CONSTANT FLOW VALVE uses a spring made of Stainless Steel coated with PCTFE (Polychloro-frifluoro-ethylene). The spring is highly durable and chemical-resistant, it has high cycle life. APPLICATION ●Ultra-pure water lines at semiconductor factories ●Chemical injection lines at chemical plants ●Lines supplying water to swimming pools ●Seawater supply lines for fish cultivation ●Cooling tower and scrubber blow water supply lines ●Anti-foaming equipment SPECIFICATIONS Body material Unplasticized Polyvinyl Chloride (PVC) ※We also produce C-PVC CONSTANT FLOW VALVE 25(1inch) and 50(2inch)mm in nominal size on reguest. Nominal Size 15mm(1/2inch)、20mm(3/4inch)、25mm(1inch)、50mm(2inch)、80mm(3inch)、100mm(4inch) End Connectors Flanged End Working Temperature 0℃ - 50℃（30°F - 120°F） Upstream Working Pressure range 0.25MPa or less {2.6kgf/cm2}･0.25 to 0.5 MPa {2.6 - 5.1kgf/cm2} 0.5 to 0.75MPa {5.1 - 7.7kgf/cm2}･0.75 to 1.0 MPa {7.7 - 10.2kgf/cm2} Accuracy Full scale value ±6％(reference: water at ambient temperature) WORKING PRESSURE VS. TEMPERATURE Unit:MPa{kgf/cm2} 0〜50（30〜120） mm inch A B C D 15 1/2 − 0.25{2.7} - 0.5{5.1} 0.5{5.1} - 0.75{7.7} − 20 3/4 − 0.25{2.7} - 0.5{5.1} 0.5{5.1} - 0.75{7.7} − 25 1 0.25{2.7}Under 0.25{2.7} - 0.5{5.1} 0.5{5.1} - 0.75{7.7} − 50 2 0.25{2.7}Under 0.25{2.7} - 0.5{5.1} 0.5{5.1} - 0.75{7.7} − 80 3 0.25{2.7}Under 0.25{2.7} - 0.5{5.1} 0.5{5.1} - 0.75{7.7} 0.75{7.7} - 1.0{10.2} 100 4 − − 0.5{5.1} - 0.75{7.7} 0.75{7.7} - 1.0{10.2} Temp.℃(°F) Type Nominal Size DIAPHRAGM VALVE BUTTERFLY BALL VALVE VALVE SWING CHECK VALVE BALL CHECK, BALL FOOT VALVE AUTOMATIC WATER GATE VALVE GAUGE VALVE STOP VALVE FEEDING VALVE ROTARY ANGLE VALVE CONSTANT FLOW ALFALFA VALVE VALVE Y-SEDIMENT NEEDLE VALVE STRAINER AIR RELEASE VALVE WAFER CHECK VALVE