237 SELF CONTROL VALVE CONSTANT FLOW VALVE Pressure setting: 0.05 - 1.0 MPa RENGE FOR PRESET FLOW RATE AND WORKING DIFFERENTIAL PRESSURE *Note: The possible preset range of the flow rate and the range of the working differential pressure differs from type to type among A, B, C, and D. The right type, therefore, it should be selected from the above table in accordance with the working conditions. PROPER FLOW RANGE mm MAXIMUM FLOW RATE [L/h] APPROPRIATE FLOW RANGE [L/h] (30 - 70% of MAXIMUM FLOWRATE) APPROPRIATE FLOW RANGE [L/m] (30 - 70% of MAXIMUM FLOWRATE) PRESSURE REDUCING TYPE 15 1,200 360 . 840 6.0 . 14.0 20 2,400 720 . 1,680 12.0 . 28.0 25 3,500 1,050 . 2,450 17.5 . 40.8 32 6,000 1,800 . 4,200 30.0 . 70.0 40 8,000 2,400 . 5,600 40.0 . 93.3 50 15,000 4,500 . 10,500 75.0 . 175.0 PRESSURE RELIEF TYPE PRESSURE RETAINING TYPE 15 1,300 390 . 910 6.5 . 15.2 20 2,200 660 . 1,540 11.0 . 25.7 25 3,500 1,050 . 2,450 17.5 . 40.8 32 5,700 1,710 . 3,990 28.5 . 66.5 40 9,000 2,700 . 6,300 45.0 . 105.0 50 14,000 4,200 . 9,800 70.0 . 163.3 mm inch TYPE FLOW RATE RANGEABILITY WORKING DIFFERENTIAL PRESSURE [MPa {kgf/cm2}] ACCURACY [m3/hr] [Gal/min] 15 1/2 B 0.04 . 0.8 0.176 . 3.52 20:1 0.020 . 0.098｛ 0.2 . 1.0｝ WITHIN +/- 6% OF FULL SCALE C 0.08 . 0.8 0.35 . 3.52 10:1 0.029 . 0.196｛ 0.3 . 2.0｝ 20 3/4 B 0.06 . 1.2 0.26 . 5.28 20:1 0.020 . 0.098｛ 0.2 . 1.0｝ C 0.12 . 1.2 0.53 . 5.28 10:1 0.029 . 0.196｛ 0.3 . 2.0｝ 25 1 A 0.5 . 2.0 2.20 . 8.81 4:1 0.020 . 0.098｛ 0.2 . 1.0｝ B 0.1 . 2.0 0.441 . 8.81 20:1 0.020 . 0.098｛ 0.2 . 1.0｝ C 0.2 . 2.0 0.881 . 8.81 10:1 0.029 . 0.196｛ 0.3 . 2.0｝ 50 2 A 2.0 . 8.0 8.81 . 35.22 4:1 0.020 . 0.098｛ 0.2 . 1.0｝ B 0.4 . 8.0 1.76 . 35.22 20:1 0.020 . 0.098｛ 0.2 . 1.0｝ C 0.8 . 8.0 3.52 . 35.22 10:1 0.029 . 0.196｛ 0.3 . 2.0｝ 80 3 A 5.0 . 20.0 22.02 . 88.07 4:1 0.020 . 0.098｛ 0.2 . 1.0｝ B 1.0 . 20.0 4.403 . 88.07 20:1 0.020 . 0.098｛ 0.2 . 1.0｝ C 2.0 . 20.0 8.81 . 88.07 10:1 0.029 . 0.196｛ 0.3 . 2.0｝ D 15.0 . 30.0 66.04 . 132.1 2:1 0.029 . 0.147｛ 0.3 . 1.5｝ 100 4 C 10.0 . 60.0 44.03 . 264.2 6:1 0.029 . 0.196｛ 0.3 . 2.0｝ D 30.0 . 60.0 132.1 . 264.2 2:1 0.020 . 0.147｛ 0.2 . 1.5｝ APPENDICES