Page 288 - 08-气源处理元件

Low Air Consumption Booster Regulator VBA Series

Selection example
Outlet air flow rate
P1: 0.5 [MPa], P2: 0.7 [MPa] VBA10A: 150 [L/min]
Average air flow rate QAVE: 19 [L/min] VBA20A: 800 [L/min]
Max. instantaneous air flow rate QMAX: 191 [L/min]
VBA10A VBA20A
Flow Rate Characteristics Flow Rate Characteristics
1.4 1.4
1.2 1 1.2 1 0.7 MPa
Outlet pressure [MPa] 0.8 0.6 MPa Outlet pressure [MPa] 0.8 0.6 MPa

0.7 MPa
0.6
0.6
0.4
0.4 MPa
0.4 MPa
P1 = 0.3 MPa 0.5 MPa 0.4 P1 = 0.3 MPa 0.5 MPa
0.2 0.2
0 0
0 50 100 150 200 250 300 350 400 0 200 400 600 800 1000 1200 1400 1600
Outlet air flow rate [L/min (ANR)] Outlet air flow rate [L/min (ANR)]

Q Flow rate
Results
The outlet air flow rate of VBA10A is
equal to the average air flow rate QAVE or VBA20A: 800 [L/min]
higher but it is less than the max.
instantaneous air flow rate QMAX.
Therefore, it can be used but an air tank 500
is required.
The outlet air flow rate of VBA20A is Max. instantaneous air flow rate
equal to the average air flow rate QAVE or QMAX: 191 [L/min]
higher and the max. instantaneous air
flow rate QMAX or higher. Therefore, it VBA10A: 150 [L/min]
can be used without an air tank. Average air flow rate QAVE: 19 [L/min]
0 Time
Booster regulator selection and air tank necessity confirmation results

Obtain the air tank capacity.
Obtain the air Application example
tank capacity. QMAX TC Required air tank volume for VBA10A
V [L] = x x K
(P2 − P3) x 9.9 60 191 0.5
V [L] = x x 2 = 2.1 [L]
(0.85 − 0.7) x 9.9 60
* Air tank of 2.1 L or more is required.

Obtain the time T from the catalog charge VBA10A
Check the air characteristics table (p. 4) and check that it
tank charge satisfies the operating frequency. Charge Characteristics
characteristics. 50
T = ( V ) x (T2 − T1) ≤ 60
10 C 40

Application example
2.1 60 30
T = ( ) x (40 − 6) = 7.1 ≤ Charge time per 10 L t [s]
10 6 20
A tank smaller than the calculation results may
satisfy the requirement since this size selection 10
calculation provides calculation which is on the
safe side. This does not consider air flowing 0
from the booster regulator. 1.0 1.2 1.4 1.6 1.8
Please use the booster regulator model Pressure increase ratio P2/P1
selection software on the SMC website.

END When running continuously for longer periods of time, confirm the life expectancy.
When the life expectancy is shorter than required, select a larger sized booster regulator.
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