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SMC VBA booster regulators
A booster regulator solves a common problem: plant air pressure is fixed (usually 0.5–0.7 MPa), but some machines need higher pressure locally, for example for pressing or fixture positioning. Upgrading the whole plant’s compressor for this is costly and wasteful. A booster regulator doubles the pressure for a single circuit from the existing air supply, with no electrical power — the boosting mechanism is driven by the air pressure itself. The SMC VBA series uses a 2× boost design with a maximum output of 2.0 MPa and an aluminum alloy (AC2B) body; both bodies can be paired with the VBAT38A1 air tank to buffer and stabilize the supply.
The VBAT38A1 air tank is optional and balances pressure fluctuations during high-frequency consumption.
Models
| Model | Type | Ports | Boost ratio | Max. flow | Set pressure range | Weight |
|---|---|---|---|---|---|---|
| VBA10A-02GN | Booster regulator | Rc1/4 (IN/OUT/EXH) | ×2 | 230 L/min (ANR) | 0.2–2.0 MPa | 0.84 kg |
| VBAT38A1 | Air tank (accessory) | 3/8″ connection | — | — | — (proof pressure up to 3 MPa) | 5.5 kg |
| VBA40A-04GN | Booster regulator | Rc1/2 (IN/OUT/EXH) | ×2 | 1900 L/min (ANR) | 0.2–1.0 MPa | 4.2 kg |
VBA10A vs. VBA40A
The main difference is flow capacity. Select by calculating the peak instantaneous air consumption of the equipment:
- VBA10A-02GN (230 L/min): for local high-pressure needs with a single small cylinder or low-frequency use, such as small fixtures and locating pins. Rc1/4 ports, compact, can be mounted directly on the side of the machine.
- VBA40A-04GN (1900 L/min): for high-flow applications with several cylinders operating together or high-frequency motion, such as multi-station pressing or pneumatic presses. Rc1/2 ports, more than 8 times the flow of the VBA10A.
Why use the VBAT38A1 air tank
When a large volume of air is drawn instantly, booster output pressure drops briefly. The VBAT38A1 air tank, connected to the booster outlet, acts as a buffer: when the equipment draws a large volume of high-pressure air, the tank supplies it first and the booster then refills, keeping pressure stable. It is especially useful with the smaller VBA10A.
Common specifications: aluminum alloy AC2B body, stainless steel spring, NBR seals; operating temperature 2–50 °C; horizontal mounting.
Pressure gauge port: Rc1/8 (standard on the OUT side) for fitting a gauge to monitor output pressure.
Related: SMC flow control page (ITV1130 regulator + AS2201F speed controller + ARM5SA regulator) · CKD SC3W speed controller (elbow type, one-touch fittings)
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