Vacuum Leak Tester
Vacuum Leak Tester – ToronVLT™ 3078
Vacuum Bubble Leak Tester for Packages
The ToronVLT™ 3078 is a vacuum leak tester that detects gross leaks in flexible packages and pouches by the bubble emission method. The instrument submerges a package in water inside a vacuum chamber and draws a vacuum, so trapped air escapes from any leak as a stream of bubbles. It gives a clear pass or fail for package and seal integrity and shows where a leak is.
The ToronVLT™ 3078 draws a vacuum to -90 kPa with a high-accuracy pressure sensor and automatic pressure control that hold the set level steady through the test. A touchscreen sets the vacuum and hold time, and a pass or reject result is logged for quick query. The standard chamber suits common pouches, and larger chambers are available.
The ToronVLT™ 3078 (Vacuum Bubble Leak Tester for Packages) suits food, pharmaceutical, and medical packaging QC, where seal and package integrity protect the product. A high-accuracy pressure sensor, automatic balance control, and overload warning support consistent, repeatable testing. The compact benchtop unit needs only a compressed-air supply and water to run.
Vacuum Leak Tester – ToronVLT™ 3078 Applications
The ToronVLT™ 3078 screens sealed packages for gross leaks wherever airtightness protects the product.
- Food Pouches and Packages: detects gross leaks in food pouches, bags, and sealed packs that must stay airtight.
- Pharmaceutical Packaging: checks blister packs, sachets, and pouches for leaks that would shorten shelf life.
- Medical and Sterile Packaging: screens medical pouches for gross leaks that would break the sterile barrier.
- Seal Integrity Verification: confirms that heat seals and closures hold under vacuum.
- Vacuum and Modified-Atmosphere Packs: verifies the integrity of vacuum and modified-atmosphere packages.
- Bottle and Container Closures: checks caps and closures for leaks with the appropriate chamber.
- Incoming and In-Process QC: screens packages during production for leak defects.
- Package Development: validates new package and seal designs for leak tightness.
Standards
The ToronVLT™ 3078 is designed to align with internationally recognized standards for package leak testing by the bubble emission method.
- ASTM D3078 - Standard Test Method for Determination of Leaks in Flexible Packaging by Bubble Emission
Leak-test acceptance depends on the package and the application, so the vacuum level and hold time can be set to a laboratory's chosen protocol.
Vacuum Leak Tester – ToronVLT™ 3078 Key Features
The ToronVLT™ 3078 combines a transparent vacuum chamber with touchscreen control for clear pass or fail leak testing.
- Bubble Emission Method: detects gross leaks by the bubble stream that escapes a package under vacuum.
- Transparent Vacuum Chamber: a clear chamber lets operators watch for bubbles and locate the leak.
- Vacuum to -90 kPa: a standard vacuum range covers common flexible packages.
- High-Accuracy Pressure Sensor: precise pressure sensing to 0.1% of full scale supports repeatable results.
- Automatic Pressure Control: constant-pressure balance control holds the set vacuum steady through the test.
- Pass or Reject Logging: pass and reject results are recorded for convenient query.
- Touchscreen Operation: a color TFT touchscreen sets the vacuum and hold time.
- Selectable Chamber Sizes: standard and larger chambers suit different package sizes.
- Overload Warning: a built-in warning guards the instrument during operation.
- Low Power Consumption: the instrument runs on a standard single-phase supply.
- Optional RS232 Communication: an optional serial port connects the instrument to a PC.
Theory and Method
The bubble emission method finds gross leaks in a sealed package by watching for air escaping under vacuum. The package, which holds a headspace of air, is submerged in water inside a sealed chamber. The chamber is then evacuated, which lowers the pressure around the package and makes the trapped air expand and push outward against the seals and walls.
When the package has a leak, the expanding air escapes through the opening and rises through the water as a steady stream of bubbles, marking the leak location. A sound package holds its air, so no continuous bubbles appear. The vacuum level and hold time are set to match the package and the standard.
The test gives a clear pass or fail for package and seal integrity, and it also shows where a leak sits, which helps trace the cause on the line. A high-accuracy pressure sensor and automatic pressure control hold the set vacuum steady through the test. The method suits food, pharmaceutical, and medical packages where a leak would shorten shelf life or break sterility.
Vacuum Leak Tester – ToronVLT™ 3078 Technical Specifications
| Parameter | Specification |
|---|---|
| Vacuum Range | 0 to -90 kPa (standard) |
| Accuracy | 0.1% FS |
| Vacuum Chamber (Standard) | Ø270 mm × 220 mm (H) |
| Vacuum Chamber (Optional) | Ø360 mm × 590 mm (H); Ø460 mm × 330 mm (H); other sizes customizable |
| Gas Source Pressure | 0.4 MPa to 1.0 MPa (user-supplied) |
| Gas Interface | Ø6 mm |
| Vacuum Chamber Outer Size | Ø300 mm × 355 mm (H) (standard) |
| Main Unit Dimensions | 335 mm (L) × 450 mm (W) × 160 mm (H) |
| Voltage | AC 220 V, 50 Hz (110V is also available) |
| Net Weight | 27 kg (main unit with standard chamber) |
Standard Delivery
| Item | Description |
|---|---|
| Main Unit | Vacuum bubble-emission leak test instrument |
| Vacuum Chamber | Standard transparent vacuum chamber |
| Spare Tube | Replacement tubing for the vacuum line |
Optional Accessories
| Item | Description |
|---|---|
| Larger Vacuum Chambers | Ø360 × 590 mm or Ø460 × 330 mm chambers for larger packages |
| Custom Vacuum Chamber | Chamber built to a specified size |