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EDS6-122A Datasheet(PDF) 3 Page - Fuji Electric |
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EDS6-122A Datasheet(HTML) 3 Page - Fuji Electric |
3 / 12 page 3 Minimum flow rate Nominal diameter mm 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 10 0.3 0.3 0.3 0.2 0.2 0.2 0.2 0.2 2.2 15 0.4 0.4 0.4 0.4 0.3 0.3 0.3 0.3 4.7 25 1.0 0.9 0.9 0.8 0.8 0.7 0.7 0.7 16 40 1.7 1.5 1.4 1.3 1.3 1.2 1.2 1.1 31 50 2.7 2.5 2.3 2.2 2.1 2.0 1.9 1.8 53 80 6.0 5.5 5.1 4.7 4.6 4.6 4.6 4.6 118 100 11 11 11 11 11 11 11 11 205 Specific gravity unit: m3/h Max. flow rate Minimum flow rate (m3/h) 1235 10 15 20253040 10 0.3 0.4 0.6 1.1 15 0.4 1.2 1.8 2.9 25 1.8 5.9 40 2.8 6.5 14 50 3.6 7.1 15 24 80 11 16 26 38 100 14 21 28 45 55 Viscosity unit: mm2/s Unmeasurable Nominal diameter mm Kinem atic viscosity For hatched area, retain Table A (according to specific gravity). ¡Gas The flow rate range is indicated in actual base. If the flow rate was given at standard status, be sure to convert it to actual flow rate and then, according to this table, determine the flow rate range or nominal diameter. Minimum flow rate (m3/h) Maximum flow rate (m3/h) 0.38 0.7 1.2 2.0 3.6 6 11 19 34 (60) 10 4.5 3.3 2.6 2.2 1.8 1.5 1.3 1.1 0.9 0.7 8.5 15 9.4 6.9 5.4 4.6 3.8 3.2 2.6 2.2 1.8 1.5 18 25 23 17 13 12 10 8 7 6 5 4 60 40 39 29 23 19 16 13 11 9 8 6 119 50 63 46 37 31 26 22 18 15 12 10 199 80 140 101 80 67 56 47 38 32 26 22 741 100 240 174 140 115 95 80 66 55 45 37 1280 Gas kind Density kg/Nm3 Gas pressure MPa (gauge), temperature 20 °C Reference: Gas viscosity Argon 1.785 — — — 0.02 0.12 0.26 0.55 1.05 2 3.6 0.007 (mPa·s) Air 1.293 — — 0 0.07 0.20 0.4 0.85 1.5 2.7 — 0.017 Oxygen 1.429 — — 0 0.05 0.17 0.35 0.75 1.35 2.5 4.4 0.0192 Carbon dioxide 1.977 — — — 0.01 0.1 0.23 0.5 0.95 1.7 3.3 0.0138 Nitrogen 1.251 — — — 0.07 0.21 0.42 0.85 1.55 2.8 — 0.0166 Nominal diameter mm Density kg/m3 ™Determination of minimum flow rate In Table D, find a value that is nearest to and lower than the pressure of gas desired, trace it upward in the same column, and retain the value at the intersection with the desired nominal diameter in Table C as minimum flow rate. If it is necessary to exactly determine a minimum flow rate, proceed to a calculation in the following manner. Example 1 Suppose the fluid is air, the temperature 20 °C, the pres- sure 0.5 MPa (gauge), and the nominal piping diameter 80 mm. How can the minimum flow rate nominal diam- eter be found? The minimum flow rate at nominal diameter of 80 mm at air of 0.4 and 0.85 MPa in Table D is, according to Table C, 47 and 38 m3/h, respectively. At a pressure of 0.5 MPa, therefore, the minimum flow rate is, according to interpolation, Or the minimum flow rate can be obtained upon calcu- lating an actual density. Actual density ρ of air at 20°C and 0.5 MPa is: From Table C, the minimum flow rate at density of 6 and nominal diameter of 80 mm is 47 m3/h and, likewise, at density of 11, is 38 m3/h. At density of 7.04, therefore, the minimum flow rate is, according to interpolation, Example 2 Suppose the fluid is carbon dioxide, the temperature 5 to 30 °C, the pressure 0.8 to 1.5 MPa, and the maximum flow rate 800 m3/h (normal). How can the minimum flow rate and the applicable nominal diameter be found? First obtain the actual maximum flow rate, and then deter- mine the nominal diameter. For calculating the maxi- mum flow rate when the temperature and pressure have ranges, retain the higher temperature and lower pres- sure. Therefore, the actual maximum flow rate is: Therefore, the nominal diameter is 40 mm. For obtain- ing the minimum flow rate, retain the lower tempera- ture and higher pressure. From Tables C and D, the minimum flow rate at nominal diameter of 40 mm and pressure of 0.95 MPa is 9 m3/h or, at pressure of 1.7 MPa, is 8 m3/h. Therefore, accord- ing to interpolation, Note: If the calculated result has a value below decimal point, truncate it for maximum flow rate, or round it up for minimum flow rate. Table A (according to specific gravity) Table B (according to viscosity) 0.85-0.5 Qmin = 38+ × (47-38) 45m3/h 0.85-0.4 273.15 0.1013+0.5 ρ = 1.293 ×× 7.04kg/m3 273.15+20 0.1013 Qmin = 38+ × (47-38) 45m3/h 11-7.04 11-6 QMax. = 800 × × 99m3/h 273.15 273.15+30 0.1013 0.1013+0.8 1.7-1.5 Qmin = 8+ × (9-8) 8.3m3/h 1.7-0.95 FLOW RATE RANGE [Table1] ¡Liquid Retain the minimum flow rate in Tables A (according to specific gravity) and B (according to viscosity), whichever is the greater. |
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