The BAV-4025 is a compact and high-performance vacuum box (400 × 250 mm) from Flying Vision, designed for leak testing of flat surfaces, welds and lap joints. The modular design allows for changing the base (e.g. different foam thicknesses) to adapt to different geometries and test scenarios.

Key features and benefits

• Two-piece modular design : Separate inspection window and replaceable base provide easy maintenance and flexibility.

• Hybrid vacuum system : Can operate with both Venturi effect (compressor) and suction mode with vacuum pump.

• Precise adjustment : Vacuum level control valve and quick release for quick separation of the can.

• High-performance foam : Closed-cell foam (40/50 Shore 00) with standard height 35 mm, flexible and durable.

• Safe reading : Approximately 15–20 mm high window provides good visibility during testing.

• Versatility : Base can be swapped to thicker foam for deeper lap joints with the use of silicone spacers.

• Optional accessories : Carrying case, calibrated vacuum gauge and LED light can be added.

Technical specifications

• Size: 400 × 250 mm , with modular height.

• Weight: ~ 4.5 kg (for kit with 35 mm foam)

• Vacuum gauge range: from 0 to −1 bar (−100 kPa)

• Max vacuum: approx. −0.9 bar.

• Foam height / options: 35 mm standard, 45 mm as an option.

• Foam hardness: 40 / 50 Shore 00

• Min. curve radius (for base adjustment): down to approx. 2.5 m with 45 mm foam (specified by manufacturer).

Areas of application

• Leak testing of flat welds such as butt welds and lap joints.

• Inspection of membranes and sealed surfaces, e.g. roofs, tanks or plates.

• Industrial inspections in oil & gas, tank construction, shipbuilding or construction.

• Field-based tests where fast assembly, high repeatability and flexible base are important.