VBA43A-04GN: High-Flow Manual Booster Valve, All-Pneumatic Solution for 1.6MPa High-Pressure Output
2026-03-05
Product Positioning
The VBA43A-04GN is a manually operated booster valve from SMC’s VBA series, a high-flow, high-pressure pneumatic boosting component. Utilizing an all-pneumatic principle, it requires no electrical power to double the plant air pressure, achieving a maximum output pressure of 1.6 MPa. This product is specifically designed for automation scenarios requiring localized high pressure, high flow rates in confined spaces, particularly where pneumatic actuator force is insufficient or cylinders need downsizing while maintaining high output force. It is widely used in heavy assembly lines, automotive manufacturing, large packaging machinery, and various industrial fields requiring high-pressure air sources.
Core Highlights: High Pressure & Flow, No Power Needed, Integrated Monitoring
- 2x Boosting, up to 1.6MPa High-Pressure Output: Using an all-pneumatic reciprocating boosting principle, it doubles standard plant compressed air pressure (0.1-1.0 MPa) up to 1.6 MPa to meet localized high-pressure needs.
- Set pressure range: 0.2～1.6 MPa, infinitely adjustable via handwheel.
- High-Flow Output, Excellent Efficiency: Under conditions of IN=OUT=0.5MPa, the maximum flow rate reaches 1600 L/min (ANR), capable of quickly pressurizing large actuators or air tanks, significantly improving system response speed.
- No Power Needed, All-Pneumatic Operation: Operates solely on compressed air, requiring no electricity or wiring. This ensures simple installation, low heat generation, explosion-proof safety, and reliability, especially suitable for electrically sensitive or humid environments.
- GN Standard: Pressure Gauges + Silencer, Ready to Use: The suffix “GN” signifies standard inclusion of two pressure gauges (inlet/outlet) and a silencer.
- Real-time monitoring of input and output pressures is possible. The silencer effectively reduces exhaust noise, improving the working environment.
- Direct Air Tank Connection, Space Saving: Features a dedicated air tank connection port for direct coupling with SMC small-capacity air tanks (e.g., VBAT series), creating a compact localized high-pressure supply unit without complex piping.
- Robust Construction, High Reliability: Employs a floating piston structure with built-in buffers to reduce metal impact noise and mechanical wear, extending service life.
- Built-in filter at the IN port prevents malfunction caused by foreign matter ingress.
- Operating temperature range: 2～50°C, suitable for most industrial environments.
Model Number Breakdown
| Code | Meaning | Explanation |
|---|---|---|
| VBA | Series Code | SMC VBA Series Booster Regulator |
| 43A | Body Size | 1/2 base · Max. operating pressure 1.6MPa, Boosting ratio 2x |
| -04 | Connection Size | 1/2 inch (corresponds to Rc1/2 thread) |
| GN | Options | With pressure gauges (2 pcs) + Silencer |
Specifications Overview
| Item | Specification | Source |
|---|---|---|
| Model | VBA43A-04GN | |
| Series | VBA | SMC Booster Valve Series |
| Applicable Fluid | Compressed Air | |
| Boosting Ratio | 2:1 | |
| Operating Pressure Range (Supply) | 0.1 ～ 1.0 MPa | |
| Set Pressure Range (Outlet) | 0.2 ～ 1.6 MPa | |
| Max. Operating Pressure (Outlet) | 1.6 MPa | |
| Proof Pressure | 2.4 MPa | |
| Max. Flow Rate | 1600 L/min (ANR) | |
| Ambient/Fluid Temperature | 2 ～ 50°C (No freezing) | |
| Port Size (IN, OUT, EXH) | Rc 1/2″ (Female thread) | |
| Pressure Gauge Port | Rc 1/8″ (2 places) | |
| Control Method | Manual Knob (with relief construction) | |
| Installation Orientation | Horizontal (silver link part must be horizontal) | |
| Lubrication | Non-lube type (Grease sealed) | |
| Weight | Approx. 8.6 kg |
Structure and Working Principle
- Working Principle: Utilizes the differential area principle where a large-area piston drives a small-area plunger. Through the reciprocating action of an internal switching valve, continuous high-pressure output is achieved. Part of the inlet air drives the large piston via the switching valve, while another part is compressed by the small piston and discharged from the outlet.
- Pressure Adjustment & Relief: The outlet pressure is adjusted via the handwheel. If the outlet pressure exceeds the set value, excess pressure is automatically released from the relief port on the back of the handwheel, achieving pressure regulation.
- Built-in Silencer: Effectively reduces exhaust noise.
Comparison with Same Series Models
VBA40A-04GN and VBA42A-04GN are also 1/2″ port, 2x boost ratio products but differ from VBA43A-04GN as follows:
| Parameter | VBA40A-04GN | VBA42A-04GN | VBA43A-04GN |
|---|---|---|---|
| Control Method | Manual Knob | Pneumatic Pilot | Manual Knob |
| Max. Operating Pressure | 1.0 MPa | 1.0 MPa | 1.6 MPa |
| Set Pressure Range | 0.2–1.0 MPa | 0.2–1.0 MPa | 0.2–1.6 MPa |
| Max. Flow Rate | 1900 L/min | 1900 L/min | 1600 L/min |
| Application Scenario | Standard manual adj. | Remote/Automatic ctrl | Manual adj. + High Pressure |
The core advantage of VBA43A-04GN is its higher pressure output capability (1.6MPa) for localized high-pressure needs, while the 40A and 42A models offer higher flow in standard manual and remote control scenarios, respectively.
Applicable Scenarios
- Pneumatic Actuator Force Boosting: When existing cylinder thrust is insufficient and replacing with a larger bore cylinder is not feasible, use a booster valve to instantly increase localized pressure for strong clamping or press-fitting.
- Cylinder Downsizing: In space-constrained stations, use a small-bore cylinder with a booster valve to meet output force requirements while saving installation space.
- High-Pressure Blowing & Cleaning: Provides 1.6MPa high-pressure airflow for specific stations, used for precision parts cleaning, mold blowing, or chip removal.
- Rapid Air Tank Charging: Directly connect to an air receiver to quickly establish a localized high-pressure air source for instantaneous high-flow demands.
- Replacing Standalone High-Pressure Pumps: Avoids the cost of a dedicated high-pressure compressor in applications only needing localized high pressure.
Summary: The “High-Pressure Power Heart” for Pneumatic Systems
The VBA43A-04GN booster valve, with its three core technical advantages—stable 2x boosting, 1.6MPa high-pressure output, and 1600L/min high flow—perfectly solves the economic challenge of “needing localized high pressure without raising the entire system’s pressure” in automation systems. Its power-free, all-pneumatic design ensures safety and low heat generation. The GN-standard pressure gauges and silencer enable plug-and-play operation and status visualization. The Rc1/2 large ports guarantee strong flow capacity. Choosing the VBA43A-04GN means equipping your heavy automation equipment with a high-pressure, high-flow, safe, and reliable “localized high-pressure power source”—the ideal choice for powerful clamping, high-pressure cleaning, and rapid air tank charging.
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