VBA40A-T04-Z SMC Corporation, VBA40A-T04-Z Datasheet - Page 9

• Manufacturer Part Number: VBA40A-T04-Z
• Description: BOOSTER REGULATOR, 1/2 NPTF PORT, HANDLE OPERATED TYPE, PSI
• Manufacturer: SMC Corporation

Specifications of VBA40A-T04-Z

• Brand/series: VBA Series
• Flow Rate: 1900 SCFM
• Pressure Adjustment: Handle Operating
• Pressure Increase Ratio: Twice
• Pressure, Operating: 1 MPa
• Proof Pressure: 1.5 MPa
• Size, Port: 1⁄2 in.
• Temperature, Ambient: 2 to 50
• Thread Type: NPTF

Working Principle
The IN air passes through the check valve to booster chambers A and B. Meanwhile, air is supplied to drive chamber B via the governor and
the switching valve. Then, the air pressure from drive chamber B and booster chamber A are applied to the piston, boosting the air in booster
chamber B. As the piston travels, the boosted air is pushed via the check valve to the OUT side. When the piston reaches to the end, the piston
causes the switching valve to switch, so that drive chamber B is in the exhaust state and drive chamber A is in the supply state respectively.
Then, the piston reverses its movement, this time, the pressures from booster chamber B and drive chamber A boosts the air in booster
chamber A and sends it to the OUT side. The process described above is repeated to continuously supply highly pressurized air from the IN to
the OUT side. The governor establishes the outlet pressure by handle operation and pressure adjustment in the drive chamber by feeding back
the outlet pressure.
Drive
chamber A
Circuit Example
• When only some of the machines in the plant require high-pressure
• When charging a tank or the like from a source at atmospheric
air, booster regulators can be installed for only the equipment that
requires it. This allows the overall system to use low-pressure air
while accommodating machines requiring high-pressure air.
pressure, a circuit with a check valve can be used to reduce the
charge time by allowing air to pass through the check valve up to
the inlet pressure.
Switching valve
Initially, inlet pressure (P
and results in P
VBA10A, 20A, 40A, 43A
General line (low pressure)
Booster
chamber A
P
Governor
1
1
= P
P
P
E
0
2
1
2
OUT (Outlet)
.
1
Check valve
) passes through the check valve, fills P
IN (Inlet)
Locations requiring high pressure
Shortening time
VBA
VBA
Time t (S)
Without check
valve by-pass
VBA
Booster chamber B
VBA
Drive chamber B
Piston rod
Piston
pressure boost)
P
2
(Two-stage
Air-operated type
VBA22A, 42A
Pilot pressure
2
,
• When the actuator output is insufficient but space limitations prohibit
• When a certain level of output is required but the cylinder size must
• When only one side of the cylinder is used for work, booster
switching to a larger cylinder diameter, a booster regulator can be
used to increase the pressure. This makes it possible to boost the
output without replacing the actuator.
be kept small so that the driver remains compact.
regulators can be installed only on the lines that require them to
reduce the overall air consumption volume.
Operating pressure:
0.5 MPa
Bore size: ø100
Output ≈ 3850 N
0.5 MPa
Booster Regulator
Piston rod
Booster
chamber A
Piston
ø100
Booster
chamber B
VBA11A
IN (Inlet)
Equivalent
Check valve
output
OUT (Outlet)
Series
Operating pressure:
0.8 MPa
Bore size: ø80
Output ≈ 4000 N
OUT 0.8 MPa
IN 0.5 MPa
Governor
E
Drive
chamber B
Switching valve
ø80
E
VBA
Drive
chamber A
6