Page 286 - 08-气源处理元件

Low Air Consumption Booster Regulator VBA Series

Solid line: Operating range
Operate so that the flow rate follows the solid line even when the outlet side air has been consumed.
Ex.) For the VBA10A: When the inlet pressure is 0.5 MPa and the set pressure is 0.8 MPa,
operate at an outlet air flow rate of 100 L/min (ANR) or less.
P1: Inlet pressure
P2: Outlet pressure

VBA10A VBA20A Pulsation/Pulsation is decreased with a tank.
If the outlet capacity is undersized, pulsation may occur.
Flow Rate Characteristics Flow Rate Characteristics VBAT05A
1.4 1.4 0.1
1.2 1 1.2 1 0.7 MPa 0.08
Outlet pressure [MPa] 0.8 0.6 MPa Outlet pressure [MPa] 0.8 0.6 MPa Max. pulsation range [MPa] 0.06

0.7 MPa
0.6
0.6
0.04
0.4
0.4 MPa
0.4 MPa
P1 = 0.3 MPa 0.5 MPa 0.4 P1 = 0.3 MPa 0.5 MPa 0.02
0.2 0.2 VBAT05A
0 0
0 50 100 150 200 250 300 350 400 0 200 400 600 800 1000 1200 1400 1600 0 1 2 3 4 5
Outlet air flow rate [L/min (ANR)] Outlet air flow rate [L/min (ANR)] Capacity [L]
VBAT
Charge Characteristics Charge Characteristics
50 6 VBA10A

5 4 VBAT10A, VBAT20A, VBAT38A
Charge time per 10 L t [s] 30 Charge time per 10 L t [s] 3 2 0.08
40
0.1

20

10
1 Max. pulsation range [MPa] 0.06 VBAT10A
0 0 0.04
1.0 1.2 1.4 1.6 1.8 1.0 1.2 1.4 1.6 1.8
Pressure increase ratio P2/P1 Pressure increase ratio P2/P1 0.02 VBAT20A
VBAT38A
VBA10A VBA20A 0 10 20 30 38 40
¡ The time required to charge pressure in the tank from ¡ The time required to charge pressure in the tank from Capacity [L]
0.6 MPa to 0.8 MPa at 0.5 MPa supply pressure: 0.6 MPa to 0.8 MPa at 0.5 MPa supply pressure: VBAT
P2 0.6 P2 0.8 P2 0.6 P2 0.8
0.5
0.5
0.5
0.5
P1 = = 1.2 P1 = = 1.6 P1 = = 1.2 P1 = = 1.6
With the pressure increase ratio from 1.2 to 1.6, the With the pressure increase ratio from 1.2 to 1.6, the
charge time of 12 – 4 = 8 s (t) is given by the graph. charge time of 1.9 – 0.5 = 1.4 s (t) is given by the VBA20A
Then, the charge time (T) for a 10 L tank: graph. Then, the charge time (T) for a 100 L tank: Conditions: Inlet pressure: 0.5 MPa
Outlet pressure: 0.85 MPa
V 10 V 100 Flow rate: Between 0 and max. flow rate
T = t x = 8 x = 8 (s) T = t x = 1.4 x = 14 (s)
10 10 10 10
¡Performance of air tank
· Alleviates the pulsation generated on the
outlet side.
· When air consumption exceeds air supply
during intermittent operation, required air will
be accumulated in the tank for use.
This does not apply for continuous operation.

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