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Pressure booster Series P+ Method of calculation of the time necessary to increase the pressure in a tank of a given volume using a pressure booster. DATA: P1 = Inlet pressure P2' = Initial tank pressure P2" = Final tank pressure V = Tank volume PROCEDURE: 5) Apply the formula T = V 5 ( T'' - T' ) to obtain the total time needed to take the tank of volume V from the pressure value P2’ to the pressure value P2’. Example of calculation of the necessary time to take a 10L tank from the pressure value P2’ to the value P2” K’ = 0,8 K'' = 1,5 5 5 V = 5L. (12-3,6 )= 8,4 sec. Filling Characteristics (5 litres tank ) 30 25 Filling time (s) T= T’ = 3,6 sec. T'' = 12 sec. 20 T'' 15 10 T’ 5 0 0,2 0,4 0,6 0,8 1 1,2 1,4 1,6 1,8 2 K ratio P2/P1 P1 = Inlet pressure P2 = Tank pressure Overall dimensions and technical information are provided solely for informative purposes and may be modified without notice 2 | 215 2 Air Service UnitS 1) Calculate the K' ratio between the initial tank pressure and the inlet booster pressure (P2'/ P1). 2) Calculate the K'' ratio between the final tank pressure and the inlet booster pressure (P2''/ P1). 3) Locate, on the chart illustrating, the booster filling time, the intersection point between the K’ ratio and the curve, then trace a vertical line from the intersection point to the vertical axis and read the correspondent value T’ (in the example chart, to a ratio of 0.8 corresponds a time value of about 3.6 seconds). 4) Repeat the operation for the K’’ ratio, obtaining the T'' time.
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