Datasheet

Tc Ts
Pressure
Stroke
Upper limit of pressure inside the tank P3
Inlet pressure P1
Time
øD
L
P2P3P1
Necessary supply
pressure to cylinder P
2
Sizing
( )
END
START
NO
NO
NO
YES
YES YES YES
YES
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.
Select the tank
from table below.
Judgement of
flow rate
Extend
stop time Ts
up to charge time
T or more.
Avoid
pulsation.
(Max. 0.05
MPa)
Judgement
of charge time
T ≤ Ts
Provide requisite
conditions for
selection.
Calculate required
air flow rate Q.
Select booster regulator
size from flow-rate
characteristics table.
Obtain the tank
capacity V.
Select the tank
capacity over V.
Calculate time T from
charge characteristics
table.
Increase number of
booster regulators (Z)
to decrease T.
Tank model
VBAT05A
VBAT10A
VBAT20A
VBAT38A
VBA1쏔A
VBA1쏔A
—
—
—
VBA2쏔A
VBA2쏔A
VBA2쏔A
—
—
VBA4쏔A
VBA4쏔A
Applicable combination modelInternal capacity
5 L
10 L
20 L
38 L
• Set the pressure increase ratio of the VBA11A (pressure increase
ratio 4) to 2 or more. When the VBA11A is used at a pressure
increase ratio of 2 or less, this may cause a malfunction.
• Since the booster regulator is a compressor powered by the air, it
consumes the air. The air consumption is approximately 1.2 times
(pressure increase ratio 2) or 2.7 times (pressure increase ratio 4)
larger than the outlet side volume. Therefore, the booster
regulator requires a supply capacity of the inlet side volume that
is approximately 2.2 times (pressure increase ratio 2) or 3.7 times
(pressure increase ratio 4) larger than the outlet side volume.
Sizing can be achieved with the SMC Pneumatic System Energy Saving Program Ver. 4.0.06
which can be downloaded from the SMC website: http://www.smcworld.com/
Caution
Lower limit of pressure inside the tank P2
100
100
200
1
0.5
30
0.5
0.8
Example
Necessary conditions:
D [mm]: Cylinder bore size
L [mm]: Cylinder stroke
W [mm/s]: Cylinder operating speed
C [pc.]: Number of cylinders
Tc [s]: Cylinder operating time
Ts [s]: Cylinder stop time
P
1 [MPa]: Inlet pressure
P
2 [MPa]
Note 1)
: Necessary supply
pressure to cylinder
Note 1) P2 is the necessary supply pressure to a cylinder, and set the pressure below the lower limit of pressure inside the tank
with a regulator. Adjust the pressure taking the maximum operating pressure of equipment in use into consideration.
Note 2) P
3 is the output pressure of the booster regulator, which is also the upper limit of charge pressure to the tank.
Other conditions:
Q [L/min (ANR)]: Required air flow rate
Qb [L/min (ANR)]: Outlet air flow rate of booster regulator
Tc [s]: Cylinder operating time
K: Cylinder double-acting: 2, single-acting: 1
P
3 [MPa]
Note 2)
: Tank charge pressure
T
1 [s]: Time to charge (Time to charge to P2)
T
2 [s]: Time to charge (Time to charge to P3)
T
[s]: Time to charge (Time to charge from P2 to P3)
Z: Number of booster regulators
Q [L/min (ANR)] =
π x D
2
x W
x
(P
2
+ 0.101)
x 60 x C
4 x 10
6
0.101
Q =
π x 100
2
x 200 (0.8 + 0.101)
x 60 x 1 = 841 [L/min (ANR)]x
4 x 10
6
0.101
Refer to “Flow-rate Characteristics” on pages 3 and 4.
VBA2쏔A: Qb = 600 [L/min (ANR)]
VBA4쏔A: Qb = 1050 [L/min (ANR)]
NO: Need no tank
The VBA4쏔A can supply necessary pressure.
The VBA2쏔A cannot obtain necessary pressure.
(P
3 – P2) x 9.9
V [L] =
(Q – Qb/2) x (Tc x K/60)
V = = 4.6 [L]
(1.0 – 0.8) x 9.9
Select the VBAT10쏔, which can be
directly connected to the
VBA2쏔A.
(841 – 600/2) x (0.5 x 2/60)
Refer to “Charge Characteristics” on pages 3 and 4.
T = ( ) x = 3.5 [s]
T [s] = ( ) x
T2 – T1V
10
4.6
10
Z
11.5 – 3.8
1
Series VBA
5