SMC Networks VBA10A Operation Manual page 2

 If the product is used in a condition in which large amounts of drainage
remain in the filter, mist separator, and tank, drainage may flow out the
booster cause malfunction. Exhaust drainage from filters once a day to
prevent such failure. For the auto-drain type, also check the operation
once a day.
Pneumatic Circuit
! WARNING
(1)Against abnormal outlet pressure
 When it is foreseen that an unexpected failure of the booster
regulator world cause a significant damage to your system, please
take appropriate safety measure in your system design.
 If the inlet pressure fluctuation is large, the outlet pressure maybe
over the setting range of governor, and that will result in an
unexpected accident. Take appropriate safety measures.
(2)Dealing With Residual Pressure
 To quickly exhaust residual pressure downstream of the booster
regulator for maintenance, connect a 3-way valve to the OUT port of the
booster regulator (see drawing below). Please note that the booster
regulator downstream pressure cannot be exhausted through the
booster even if the 3-way valve is installed in the IN port of the booster
regulator.
Directional
control valve
AM AF
3-way valve
Booster
residual
regulator
pressure
relief valve
 After exhausting the downstream piping, exhaust supply pressure at
the booster regulator inlet side using the residual pressure relief valve
upstream the booster regulator .This will stop unnecessary operation
and prevent malfunction.
Directional
Booster
regulator control valve
AF
AM
3-way valve
residual pressure
relief valve
Pressure Control
(1)Handle operation type
 To increase the set the pressure by unlocking the handle slightly pulling
it up, and, rotating it in the (+) direction of the arrow. To decrease the set
pressure after the pressure has been set, unlock the handle, and then
rotate the handle in the (-) direction of the arrow.
 The handle is locked when it is pushed
down(PUSH), and released when it is pulled
up (PULL).
 The residual air will be released from the
area of the handle, due to the relief
construction of the handle.
(2)Air operated type
 Connect a regulator to the pilot port as
shown below.
 AR20 and AW2000 are recommended for
the pilot regulator.
 As shown in the drawing on the right, the
outlet pressure is twice of pilot pressure at
zero flow rate consumption.
 When booster supply pressure is 0.4MPa
and pilot pressure is 0.2MPa to 0.4MPa the
outlet pressure is 0.4MPa to 0.8MPa at zero
flow rate.
! WARNING
 Operate the booster regulator within its
maximum operating pressure and set
pressure range.
 Do not rotate the handle to a pressure
exceeding the max. set pressure.
Model
Maximum set pressure
 Do not supply 0.5MPa or more of pilot pressure for VBA22A and
VBA42A.When the inlet pressure becomes 0.5MPa or more, the outlet
pressure will increase and finally exceed the operating pressure range.
 The lower limit of the set pressure should be the inlet pressure plus
0.1MPa or more. When the booster regulator is operated with the
minimum operating pressure (0.1MPa) or less, the directional control
valve may stop at the intermediate position.
● Check the following points in the event of product failure before returning to SMC to perform service investigation
Troubleshooting by end user
Actuator
Trouble
Leakage from the
handle
(Relief air does not
stop.)
Outlet pressure does
not increase.
Does not operate.
Actuator
Operation does not
stop. When there is no
air consumption from
the outlet port.
- +
PULL
(1) The life of the booster regulator depends on the air quality and operating conditions. The following are signs that it is reaching the end of its life.
 Even when the outlet flow rate is 0, the booster regulator doesn't stop. (When the interval of the exhaust noise is less than 30 seconds, the seals are being worn out
or damaged.)
 Sliding noise (abnormal noise). (This indicates that lubrication is running out).
 The silencer mounted on the exhaust turns black due to dirt. (Seals are getting worn out, so particles get stuck in the silencer.)
PUSH
(2) Maintenance
 Only personnel who are fully trained and experienced in pneumatically operated machinery and equipment should perform the maintenance in accordance with the
Regulator for Pilot
maintenance manual.
 Refer to the maintenance manual for the replacement parts.
(3) When making a request for maintenance to SMC
 Remove accessories such as fittings mounted on the booster
parts before returning to SMC.
P
 Non-consumables parts (example: body, tube, covers) which are
IN
OUT
worn out or damage cannot be replace as part of the
maintenance request.
E
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0.1 0.2 0.3 0.4 0.5
Pilot pressure(MPa)
(Outlet flow rate:0L/min)
VBA1 A VBA2 A, 4 A VBA43A
2.0MPa 1.0MPa 1.6MPa
Possible cause
Inlet pressure is higher than the set pressure.
Sealing failure of the governor due to foreign matter.
IN and OUT piping connected the wrong way round.
Insufficient supply of Inlet pressure and flow rate.
Outlet flow rate (amount used) is too much.
The silencer is clogged.
The handle is turning idly (handle breakage).
The booster valve stopped because the pressure was lower
than the minimum operating pressure.
(Intermediate stop of the directional control valve)
Operation is stopped due to intrusion of foreign matter.
(Intermediate stop of the directional control valve due to
increase in internal resistance.)
Air is leaking from the equipment or piping on the downstream
side of the outlet.
Sealing is worn out or broken due to intrusion of foreign matter
or lubrication running out.
CAUTION
!
 The pressure of the handle is set to 0 before shipment. When the air is
supplied, the pressure is relieved.
 It is not possible to reduce the pressure to the inlet pressure or less.
This product does not have a pressure regulator function.
 There are upper and lower limits to the handle operation. If the handle
is rotated too far, it will break.
Selection
 This product consumes air because it uses compressed air to boost the
pressure. The air consumption is approx. 1.2 times (ratio of intensified
pressure 2) and approx. 2.7 times (ratio of intensified pressure 4) as
much as air consumed on the outlet side. Therefore, inlet air supply
should be approx. 2.2 times (ratio of intensified pressure 2) as more
than the air consumed on the outlet side. Inlet air supply should be
approx. 3.7 times (ratio of intensified pressure 4).
 When running continuously for extended periods of time, confirm the
life expectancy. The life expectancy of a booster regulator depends on
the operational cycle. Thus the more frequently the actuator operates in
the outlet side or the higher the pressure, the shorter the life expectancy
will be.
Time of occurrence Countermeasures
Initial phase Set the pressure to the inlet pressure or more with the handle.
Middle phase If the inlet pressure fluctuation is large, stabilize it with a regulator.
Initial phase Disassemble the governor and remove the foreign matter (Refer to the
Middle phase maintenance procedure).
Initial phase Reconnect the piping properly.
(1)Decrease the operating pressure and flow rate.
Initial phase
(2)Change the size of the booster valve (from VBA2 to VBA4).
Middle phase
(3)Increase the number of the booster valve (use in parallel or in series).
later Replace the silencer.
Initial phase Remove the handle and rotate the square nut with a spanner wrench.
Relieve the supply pressure after the operation is stopped.
Initial phase
If the inlet pressure fluctuation is large, stabilize it with a regulator.
Middle phase
(1) Supply air and increase the exhaust pressure while holding the exhaust port
Initial phase
with your finger. Then release your finger quickly.
Middle phase
(2) Relieve the air from IN and OUT ports. After that, supply the air again and
later
increase the pressure rapidly.
Check where the air is leaking from and fix it.
Initial phase
Middle phase Change the seals (Refer to the maintenance procedure).
later
URL http://www.smcworld.com
Akihabara UDX 15F
Phone: +81 3 5207 8249 Fax: +81 3 5298 5362
Specifications are subject to change without prior notice and any obligation the part of the manufacturer.
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