Leak Testing for Coils, Components, and Sealed Units

VTech’s leak testing solutions are custom-engineered for each specific application and use a variety of leak testing methods including Helium or Hydrogen tracer gas, Pressure Decay, Refrigerant Leak Detector, as well as Vacuum Leak Test.

Each project begins with a comprehensive review of all key requirements that are matched with the physical characteristics of the component or system to be tested. We offer free initial consultation on each project as well as preliminary testing at our facility.

Based on this initial assessment, we select the most suitable leak detection technology and equipment geometry. Productivity plays a big role in the choice between manual or automatic operation or even a combination of both. Also, test pressures will dictate the use of safety enclosures or other safety devices. Preliminary schematics for pre-construction approval are provided.

The project is concluded with on-site installation and training.


VTECH Leak Testing Solutions

Leak Testing Methods
  • Automatic
  • Manual
  • Combination
Leak Testing Technology
  • Pressure Decay
  • Automatic Mass-Spectrometry
  • Semi-automatic and manual sniffing
Leak Testing Gases
  • N2, He, N2/H2
Leak Rates
  • As low as 1 x 10-6 mbar l/s
Leak Detection Safety Equipment
  • Custom Safety enclosures
  • Safety Interlocks
  • Light Curtain
  • Safety Chain
Leak Detection Equipment Control
  • PLC, PC
Leak Detection User Interface
  • Touch Screen
Leak Detection Product Applications
  • Refrigeration Coils
  • Water Coils
  • Heat Exchangers
  • Valves
  • Compressors
  • Air Handlers
  • Radiators
  • Refrigeration and A/C Sealed Units
  • Line sets, hoses, tubes, etc.

Product Items

Leak Testing

  • Pressure Leak Test

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    A Pressure Leak Test or Pressure Decay Leak Test involves pressurizing the coil, component or refrigeration circuit with dry air or nitrogen and monitoring for a pressure drop over a preset time period.

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  • Tracer Gas Leak Test

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    Helium or Hydrogen/Nitrogen Mix is injected under pressure into the unit under test (UUT). An integrated leak detector senses the presence of any gas leaking out of the UUT and measures the corresponding leak rate. This test can be performed either in manual or automatic mode.

    In order not to contaminate the working environment with large quantities of tracer gas, this test follows a prior Pressure Leak Test aimed to detecting gross leaks.

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  • Refrigerant Leak Detector

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    Refrigerant leak testing/detection of a sealed refrigeration circuit takes place right after Refrigerant Filling and/or after Performance Testing.

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  • Helium Recovery

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    Helium Recovery is suitable for high productivity leak testing operations where a large quantity of helium is used. It involves recovering helium from the unit under test (UUT), checking and possibly reinstating its concentration, and compressing it back to the required leak test pressure. The process parameters dictate the number and size of the compressors and recovery tanks in the system.

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