Datasheet

Design
Warning
1. Warning concerning abnormal outlet pressure
• If there is a likelihood of causing an outlet pressure drop
due to unforeseen circumstances such as equipment mal-
function, thus leading to a major problem, take safety mea-
sures on the system side.
• Because the outlet pressure could exceed its set range if
there is a large fluctuation in the inlet pressure, leading to
unexpected accidents, take safety measures against abnor-
mal pressures.
• Operate the equipment within its maximum operating pres-
sure and set pressure range.
2. Residual pressure measures
• Connect a 3-port valve to the OUT side of the booster regu-
lator if the residual pressure must be released quickly from
the outlet pressure side for maintenance, etc. (Refer to the
below diagram.) The residual outlet pressure side cannot be
released even if the 3-port valve is connected to the IN side
because the check valve in the booster regulator will activa-
te.
• After operation is finished, release the supply pressure at the in-
let. This stops the booster valve from moving needlessly and
prevents operating malfunctions.
Selection
Caution
1. Verify the specifications.
• Consider the operating conditions and operate this product
within the specification range that is described in this catalo-
gue.
2. Selection
• Based on the conditions (pressure, flow rate, takt time, etc.)
required for the outlet side of the booster regulator, select
the size of the booster regulator in accordance with the se-
lection procedures described in this catalogue or model se-
lection program.
• Use the VBA1111 (pressure increase ratio 4) with pressure
increase ratio of 2 to 4. Usage of pressure increase ratio
below 2 is preferred for the VBA10A (pressure increase ra-
tio 2). A stable operation and increased life expectancy will
result.
• Inlet supply pressure volume is approximately twice the vo-
lume of the outlet side. {approx. 2 times (pressure increase
ratio 2), approx. 4 times (pressure increase ratio 4)}. Boos-
ter regulator requires that the inlet side volume should be
the sum of the flow volume running into the outlet side and
the volume exhausted from E port (for driving), because air
is the power source.
• When running continuously for longer periods of time, con-
firm the life expectancy. The life expectancy of a booster re-
gulator is dependent upon the operational cycle. Thus,
when used for driving cylinders, etc. in the outlet side, life
expectancy will be reduced.
• Make sure the outlet pressure is set more than 0.1 MPa hig-
her than the inlet pressure. A pressure difference less than
0.1 MPa makes the operation unstable and may result in
malfunction.
Mounting
Caution
1. Transporting
• When transporting this product, hold it lengthwise with both
hands. Never hold it by the black handle that protrudes from
the centre because the handle could become detached
from the body, causing the body to fall and leading to injury.
2. Installation
• Install this product so that the silver-coloured tie-rods and
cover are placed horizontally. If mounted vertically, it may
result in malfunction.
• Because the piston cycle vibration is transferred, use the fo-
llowing mounting bolts (VBA1: M5; VBA2, 4: M10) and tigh-
ten them with the specified torque (VBA1: 3 N ·m; VBA2, 4:
24 N·m).
• If the transmission of vibration is not preferred, insert an iso-
lating rubber material before installation.
• The pressure gauge should be mounted with the following
torque. R 1/16: 3 to 4 N, R 1/8: 7 to 9
N
Piping
Caution
1. Flushing
• Use an air blower to flush the piping to thoroughly remove
any cutting chips, cutting oil, or debris from the piping insi-
de, before connecting them. If they enter the inside of the
booster regulator, they could cause the booster regulator to
malfunction or its durability could be affected.
2. Piping size
• To bring the booster regulator’s ability into full play, make
sure to match the piping size to the port size.
Air Supply
Caution
1. Quality of air source
• Connect a mist separator to the inlet side near the booster
regulator. If the quality of the compressed air is not tho-
roughly controlled, the booster regulator could malfunction
(without being able to boost) or its durability could be affec-
ted.
• If dry air (atmospheric pressure dew point: –17°C or less) is
used, the life expectancy may be shortened because dry air
will accelerate evaporation of grease inside.
Operating Environment
Caution
1. Installation location
• Do not install this product in an area that is exposed to rain-
water or direct sunlight.
• Do not install in locations influenced by vibrations. If it must
be used in such an area due to unavoidable circumstances,
please contact SMC beforehand.
Series VBA
Handling
1
0.9
0.8
0.7
0.6
0.5
0.5
0.4
0.4
0.3
0.3
0.2
0.2
Pilot pressure MPa
0.1
0.1
0
Outlet pressure MPa (Q = 0)
SMC
HighLow
1. Setting the pressure on the handle-operated type
• If air is supplied to the product in the shipped state, the air
will be released.
Set the pressure by quickly pulling up on the governor han-
dle, releasing the lock, and rotating the handle in the direc-
tion of the arrow (+).
• There is an upper and lower limit for the handle rotation. If
over-rotating the handle even after reaching to the limit, the
internal parts may be damaged. If the handle suddenly feels
heavy while being turned, stop turning the handle.
• Once the setting is completed, push the handle down and
lock it.
• To decrease the outlet pressure, after the pressure has
been set, rotate the handle in the direction of the arrow (–).
The residual air will be released from the area of the han-
dle, due to the relief construction of the governor.
• To reset the pressure, first reduce the pressure so that it is
lower than the desired pressure; then, set it to the desired
pressure.
Caution
2. Setting the pressure on the air-operated type
(VBA22A, 42A)
• Connect the outlet pipe of the pilot regulator for the remote
control to the pilot port (P). (Refer to the figure below.)
• Refer to the following figure for the relation between the
pilot pressure and outlet pressure.
• The AR20 and AW20 are recommended for the pilot regula-
tor.
Pilot regulator
• The outlet pressure is twice the pilot pressure.
• When the inlet pressure is 0.4 MPa:
Pilot pressure
0.2 MPa to 0.4 MPa
Outlet pressure
0.4 MPa to 0.8 MPa
3. Draining
• If this product is used with a large amount of drainage accu-
mulated in the filter, mist separator, or the tank, the draina-
ge could flow out, leading to equipment malfunction. There-
fore, drain the system once a day. If it
is equipped with an
auto-drain, check its operation once a day.
4. Exhaust
• Exhausting time from E port may be longer for a booster re-
gulator which is set to switch in longer hour intervals. This is
not an abnormal phenomenon.
5. Maintenance
• Life expectancy varies depending on the quality of air and
the operating conditions. Signs that the unit
is reaching the
end of its service life include the following:
•
Constant bleed from under the handle.
•
Air exhaust can be heard from the booster regulator at 10
to 20 second intervals even when there
is no air con-
sumption on the outlet side.
Conduct maintenance earlier than scheduled in such cases.
• When maintenance is required, confirm the model and serial
number of the booster regulator, and please contact SMC
for maintenance kit.
• Maintenance should be carried out according to the speci-
fied maintenance procedure by individuals possessing
enough knowledge and experiences in maintaining pneu-
matic equipment.
• The list of replacement parts and kit part number are shown
on page 9, and the figure shows the position of the parts.
Booster Regulator Series VBA
8