Vacuum Box for Leak Testing with Interchangeable Base (BAV-4025)

Industrial vacuum box BAV4025

Non-contractual photo

Easily control the tightness, waterproofing of your welds and sheets with the new generation BAV4025 vacuum box with interchangeable base.

The BAV4025 is an NDT vacuum box designed for flat surfaces, tailored for leak testing welds, sheets, waterproofing membranes, and coverings on roof terraces, flat roofs in various industrial sectors. Its interchangeable base offers great flexibility to inspect different surfaces and weld configurations, enabling rapid leak detection.


The BAV4025 is a vacuum box, also known as a bubble box, specifically designed for checking the tightness of flat surfaces (configuration 1), for example:

  • Storage tanks:
    • Tank bottom plates
    • Shells with a curvature radius greater than 2.5 meters
  • Boat hulls
  • Overlap and butt welds
  • Roofing waterproofing sheets and membranes, flat or terrace roofs
  • Any other surfaces (metallic or non-metallic) where a pressure gradient can be applied

Its two-part design consisting of the main body and an interchangeable base addresses the challenges of equipment maintainability (maintenance), versatility, and ensures good readability of indications (height of the viewing window).

The BAV-4025 vacuum box can optionally accommodate the internal corner base of the BAV-4025IA (configuration 2) to increase its inspection capabilities.

Our vacuum box can operate either by compression using the venturi system or by suction using our specially adapted optional vacuum pump.

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KIT COMPOSITION (excluding options):

  1. Main body/reading chamber comprising:
  • Handling grips
  • Vacuum gauge
  • Hybrid vacuum system:
    • By venturi effect / using a compressor
    • By suction / using a vacuum pump
  • Vacuum adjustment valve for:
    • Flow limitation when using a compressor
    • Leakage flow when using a vacuum pump
  • Quick base attachment system
  • 50 cm extension with a quick female connector to cat’s head (Vacuum by venturi effect / compressor)
  1. Interchangeable flat base comprising:
  • Seal between the reading chamber and the base
  • Interface foam with the surface under inspection



2 cm high viewing window for clear and reliable reading of indications

Ultra-efficient sealing foam for easy and quick vacuum generation

Precision gauge to ensure proper control conditions

Precise vacuum adjustment with a valve

Quick detachment of the vacuum box by a rapid vacuum release system


Robust and reliable design for durable use in demanding industrial environments

High-quality foam offering excellent resistance to abrasion and hydrocarbons


Operation in venturi effect mode (by compressor) or suction mode (vacuum pump)

Foam geometry and quality allow adaptability to many sheet geometries. The BAV-4025 can inspect shells on their concave or convex parts for curvatures from a diameter of 5 meters.

Great flexibility with interchangeable bases to adapt to the most complex geometries and configurations of sheet welds.

Durable and resistant foam

Triangular geometry to increase relative pressure on the foam and allow maximum deformation on the surface of the inspection area.

35 mm foam height and 40/50 Shore 00 hardness for optimal adaptation to surfaces.

Foam offering longevity and great resistance to abrasion, as well as good hydrocarbon resistance, for durable and reliable use in demanding environments.


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Two-Part Modular Design

The BAV-4025 consists of the main body and an interchangeable base for maximum adaptability to welds and sheet geometries. This design has numerous advantages, including greatly facilitated maintenance.

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Interchangeable Bases

The base of our BAV-4025 vacuum box is designed to adapt to flat surfaces, fillet welds, and possibly double fillets. The interchangeability of the base allows you to keep the same body and change the type of base according to your inspection setup.

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Easy Reading of Indications

The height of the interchangeable base of our bubble box creates a gap of about 2 cm between the main body and the surface under inspection. This provides a significant viewing window for easy and reliable reading of indications.

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Vacuum by Venturi Effect

Possibility of operation in venturi effect mode by connecting a compressor either directly to the quick pneumatic system or to the 50cm cat’s head extension provided.

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Vacuum by Vacuum Pump

Possibility of operation in suction mode by connecting our specially adapted optional 220v vacuum pump.

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Precise Vacuum Control

The vacuum gauge (-1 Bar, CE certified) allows precise adjustment of the vacuum necessary for inspection, thanks to the venturi mode adjustment valve and our innovative regulation system for the optional vacuum pump.


Hardened transport case

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To safely transport your vacuum box, we offer a hardened transport case with a machined imprint in the shape of the vacuum box to prevent any movement.

Gauge with calibration certificate

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We standardly provide a CE-certified but uncalibrated gauge. Therefore, we offer an option of a calibrated gauge with a verification certificate for your standardized inspections.

Additional Base for Internal Right Angles

industrial angle vacuum box

This option allows you to keep the body of your BAV-4025 vacuum box and equip it with this base for inspecting internal right angles (see control configuration no. 2 at the top of the page). Custom-made bases can be produced upon request.

Vacuum pump PAV-2209

leak testing vaccum pump

To use the vacuum box in suction mode with a vacuum pump. We offer a customized 220V 9CFM vacuum pump adapted for field conditions. The optional “vacuum pump” pack includes a 2-meter pneumatic hose with our innovative flow regulation and rapid depressurization


Dimensions400mm x 250mm x 125mm
MaterialsMain body: Aluminium alloy, Plexiglas
Base: Plexiglas, closed-cell foam
Gauge-1 Bar
Vacuum Generator TypeHybrid system:
- Venturi Effect: Requires a compressor of 10m3/hour at 8 bar
- Vacuum pump (optional)
Foam TypeClosed-cell foam
Foam Height35 mm
Foam Hardness40/50 Shore 00

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