Vacuum Ejector In-Iine Type Series ZU Exhaust Characteristics/Flow Characteristics How to Read Flow Characteristics Graph Vacuum pressure Suction flow rate Pmax Qmax P1 Q1 Exhaust Characteristics Flow Characteristics ZU05S Flow characteristics: at 0.45 MPa ZU05L Exhaust Characteristics Flow Characteristics ZU07S Exhaust Characteristics Flow Characteristics ZU07L Exhaust Characteristics Flow Characteristics Vacuum pressure (kPa) Supply pressure (MPa) Suction flow rate N (L/min(ANR)) Air consumption N (L/min(ANR)) Vacuum pressure (kPa) Suction flow rate (L/min(ANR)) Vacuum pressure (kPa) Supply pressure (MPa) Suction flow rate N (L/min(ANR)) Air consumption N (L/min(ANR)) Vacuum pressure (kPa) Suction flow rate (L/min(ANR)) Vacuum pressure (kPa) Supply pressure (MPa) Suction flow rate N (L/min(ANR)) Air consumption N (L/min(ANR)) Vacuum pressure (kPa) Suction flow rate (L/min(ANR)) Vacuum pressure (kPa) Supply pressure (MPa) Suction flow rate N (L/min(ANR)) Air consumption N (L/min(ANR)) Vacuum pressure (kPa) Suction flow rate (L/min(ANR)) Flow characteristics are expressed in ejector vacuum pressure and suction flow. If suction flow rate changes, a change in vacuum pressure will also be noticed. Normally this relationship is expressed in ejector standard use. In the graph, Pmax is max. vacuum pressure and Qmax is max. suction flow. The values are specified according to the catalog. Changes in vacuum pressure are expressed in the order below. 1. When ejector suction flow becomes 0, vacuum pressure is at maximum (Pmax). 2. When suction port is opened gradually, air can flow through, (air leakage), suction flow increases, but vacuum pressure decreases. (condition P1 and Q1) 3. When suction port is opened further, suction flow moves to maximum value (Qmax), but vacuum pressure approaches 0 (atmospheric pressure). When vacuum port (vacuum piping) has no leakage, vacuum pressure becomes maximum. Vacuum pressure decreases as leakage increases. When leakage amount equals max. suction flow, vacuum pressure is near 0. When ventirative or leaky work must be adsorbed, please note that vacuum pressure will not be high. .90 .80 .70 .60 .50 .40 .30 .20 .10 0 0.1 0.2 0.3 0.4 0.5 0.6 0 10 20 30 40 .90 .80 .70 .60 .50 .40 .30 .20 .10 0 2 4 6 8 .70 .60 .50 .40 .30 .20 .10 0 0.1 0.2 0.3 0.4 0.5 0.6 0 10 20 30 40 .90 .80 .70 .60 .50 .40 .30 .20 .10 0 0.1 0.2 0.3 0.4 0.5 0.6 0 10 20 30 40 50 60 70 80 90 .90 .80 .70 .60 .50 .40 .30 .20 .10 0 4 8 12 .70 .60 .50 .40 .30 .20 .10 0 0.1 0.2 0.3 0.4 0.5 0.6 0 10 20 30 40 50 60 70 80 90 .60 .50 .40 .30 .20 .10 0 5 10 15 20 .60 .50 .40 .30 .20 .10 0 2 4 6 8 10 12 Vacuum pressure Vacuum pressure Air consumption Air consumption Suction flow rate Suction flow rate Vacuum pressure Air consumption Suction flow rate Vacuum pressure Air consumption Suction flow rate 1053 ZK2 ZQ ZR ZA ZX ZM ZMA ZL ZH ZU ZYY ZYX