The air consumption is the volume of air that is consumed in the cylinder or in the piping between the cylinder and the switching valve during the reciprocal movement of an air cylinder. It is necessary for selecting a compressor and for calculating the running cost. The required air volume is the volume of air that is required for operating the cylinder at a specified speed, and it is necessary for selecting the diameter ofthe piping upstream from switching valve or the FRL equipment. Data 2 Air Consumption and Required Air Volume Formula qc = Air consumption of air cylinder [dm3 (ANR)] qp = Air consumption of tubing or piping [dm3 (ANR)] q = Air consumption required for one stroke of air cylinder [dm3 (ANR)] A = Piston area at extension side [mm2] L = Cylinder stroke [mm] P = Operating pressure [MPa] l = Piping length [mm] a = Piping internal sectional area [mm2] Subscript 1: Extension side Subscript 2: Retraction side Formula Q = Required air [dm3/min (ANR)] t = Time for whole stroke [s] Subscript 1: Extension side Subscript 2: Retraction side Nominal size T�ｭ0425 T�ｭ0604 TU0805 T�ｭ0806 1/8B T�ｭ1075 TU1208 T�ｭ1209 1/4B TS1612 3/8B T�ｭ1613 1/2B 3/4B 1B O.D. (mm) 4 6 8 8 . 10 12 12 . 16 . 16 . . . I.D. (mm) 2.5 4 5 6 6.5 7.5 8 9 9.2 12 12.7 13 16.1 21.6 27.6 Internal sectional area a (mm2) 4.9 12.6 19.6 28.3 33.2 44.2 50.3 63.6 66.5 113 127 133 204 366 598 Internal Sectional Area of Tubing and Steel Piping 1. Air Consumption 2. Required Air Volume For calculating the volume of air consumption and required air in accordance with each condition, please make use of our “Equipment Selection Program” and “Energy Saving Program”. qc1 = A1 x L x x 10.6 qc2 = A2 x L x x 10.6 qp1 = a1 x l1 x x 10.6 qp2 = a2 x l2 x x 10.6 Double acting cylinder q = qc1 + qp1 + qc2 + qp2 Single acting type cylinder q = qc1 + qp1 ・・・・・・・・・・・・・・・・・・(8) ・・・・・・・・・・・・・・・・・・(9) ・・・・・・・・・・・・・・・・・・・・・・・・(10) ・・・・・・・・・・・・・・・・・・・・・・・・(11) ・・・・・・・・・・・・・・(12) ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・(13) 0.1 (P1 + 0.1) 0.1 (P2 + 0.1) 0.1 P1 0.1 P2 Q1 = x 60 Q1 = x 60 Q = Bigger one between Q1 and Q2 ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・(14) ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・(15) t1 (qc1 + qp1) t2 (qc2 + qp2) Technical Data 2: Air Consumption and Required Air Volume 1824