• Français
+33 (0)4 50 57 93 85
Contact form
logologologologo
Menu
  • PVD-Thin Films
    Deposition
    • INDUSTRY FIELDS
      Decorative Industry Energy/Photovoltaics Medical Microelectronics/Microsystems Military (Defence) Optical Process Validation R&D Watchmaking Industry
    • MACHINES RANGE
      DP EVA LINE DECORA CT MIH WD1500
      Thin films deposition principle
    • OUR MACHINES


      • DP650
        Thin Films Sputtering Equipment
      • LINE440
        PVD Thin Films Deposition Frames
      • CT200
        Thin Films Synthesizing Tool
      FRAME RENOVATION
      PVD SPECIFIC MACHINES
  • PVD-Thin Films Deposition
    • Principe – dépôt de couches minces
    • DP range
    • EVA range
    • LINE range
    • DECORA range
    • CLUSTERTOOL range
    • Gamme MIH
    • WD1500 range
    • Special Equipment in Vacuum Technology
    • — by sector —
    • Decorating industry
    • Military (defence)
    • Energy, photovoltaics
    • Process Validation
    • Watchmaking industry
    • Medical
    • Microelectronics, microsystems
    • Optical
    • Research & Development
  • Leak
    Testing
    • INDUSTRY FIELDS
      Aeronautics & Aerospace Air Cooling Treatment, Refrigeration Automotive Connectors / Quick-Connectors Electronics Energy Medical / Pharmaceutical Military (Defence) Process Validation
    • MACHINES RANGE
      Modul'He HM100
      Leak Testing Principle
    • OUR MACHINES


      • HM1000
        Helium Concentration Measurer
      • Modul'He
        Leak Testing Monitoring System
      SPECIFIC MACHINES
  • Leak Testing
    • Leak Testing, leak detection principle
    • Modul’He
    • HM100 Helium Concentration measurer
    • Leak testing specific machines
    • — by sector —
    • Aeronautics and Aerospace
    • Automotive Industry Leak Testing
    • Connectors / Quick-Connectors
    • Electronics Industry
    • Leak testing for the Energie sector
    • Air Treatment & Refrigeration Industry
    • Leak Testing Systems for the Health Industry
  • Plasma
    treatment
    • PRINCIPLE
      Plasma surface treatment principle
    • MACHINE RANGE
      P300 Treatment Equipment
    • OUR MACHINES


      Manufacturer of plasma treatment machines
  • Plasma treatment
    • Plasma surface treatment principle
    • P300 Treatment Equipment
  • Ion beam
    polishing
  • Ion beam polishing
  • High vacuum pumping
    bench system
    • PRINCIPLE
      High vacuum pumping bench system in a few words
    • MACHINE RANGE
      Residual Gas Analysis Neutral gas packaging Heat Collection/ Degassing Inert treatment with nitrogen
    • OUR MACHINES


      Manufacturer of neutral gas packaging machines
  • High vacuum pumping bench system
    • High Vacuum Pumping Bench System
    • Residual Vapors & Gas Analysis (RGA)
    • Neutral Gases Conditioning Equipment
    • Bake-Out/ Degassing
    • Nitrogen Shrouding
  • Company
    • COMPANY
      Company Presentation Knowledge Base
    • CAREERS
      Job Offers Spontaneous Application
    • CUSTOMER SUPPORT

  • Company
    • Company Presentation
    • Knowledge base
    • Careers
    • Spontaneous Application
    • Customer Service
  • Equipment Store
  • Contact
Menu
  • PVD-Thin Films
    Deposition
    • INDUSTRY FIELDS
      Decorative Industry Energy/Photovoltaics Medical Microelectronics/Microsystems Military (Defence) Optical Process Validation R&D Watchmaking Industry
    • MACHINES RANGE
      DP EVA LINE DECORA CT MIH WD1500
      Thin films deposition principle
    • OUR MACHINES


      • DP650
        Thin Films Sputtering Equipment
      • LINE440
        PVD Thin Films Deposition Frames
      • CT200
        Thin Films Synthesizing Tool
      FRAME RENOVATION
      PVD SPECIFIC MACHINES
  • PVD-Thin Films Deposition
    • Principe – dépôt de couches minces
    • DP range
    • EVA range
    • LINE range
    • DECORA range
    • CLUSTERTOOL range
    • Gamme MIH
    • WD1500 range
    • Special Equipment in Vacuum Technology
    • — by sector —
    • Decorating industry
    • Military (defence)
    • Energy, photovoltaics
    • Process Validation
    • Watchmaking industry
    • Medical
    • Microelectronics, microsystems
    • Optical
    • Research & Development
  • Leak
    Testing
    • INDUSTRY FIELDS
      Aeronautics & Aerospace Air Cooling Treatment, Refrigeration Automotive Connectors / Quick-Connectors Electronics Energy Medical / Pharmaceutical Military (Defence) Process Validation
    • MACHINES RANGE
      Modul'He HM100
      Leak Testing Principle
    • OUR MACHINES


      • HM1000
        Helium Concentration Measurer
      • Modul'He
        Leak Testing Monitoring System
      SPECIFIC MACHINES
  • Leak Testing
    • Leak Testing, leak detection principle
    • Modul’He
    • HM100 Helium Concentration measurer
    • Leak testing specific machines
    • — by sector —
    • Aeronautics and Aerospace
    • Automotive Industry Leak Testing
    • Connectors / Quick-Connectors
    • Electronics Industry
    • Leak testing for the Energie sector
    • Air Treatment & Refrigeration Industry
    • Leak Testing Systems for the Health Industry
  • Plasma
    treatment
    • PRINCIPLE
      Plasma surface treatment principle
    • MACHINE RANGE
      P300 Treatment Equipment
    • OUR MACHINES


      Manufacturer of plasma treatment machines
  • Plasma treatment
    • Plasma surface treatment principle
    • P300 Treatment Equipment
  • Ion beam
    polishing
  • Ion beam polishing
  • High vacuum pumping
    bench system
    • PRINCIPLE
      High vacuum pumping bench system in a few words
    • MACHINE RANGE
      Residual Gas Analysis Neutral gas packaging Heat Collection/ Degassing Inert treatment with nitrogen
    • OUR MACHINES


      Manufacturer of neutral gas packaging machines
  • High vacuum pumping bench system
    • High Vacuum Pumping Bench System
    • Residual Vapors & Gas Analysis (RGA)
    • Neutral Gases Conditioning Equipment
    • Bake-Out/ Degassing
    • Nitrogen Shrouding
  • Company
    • COMPANY
      Company Presentation Knowledge Base
    • CAREERS
      Job Offers Spontaneous Application
    • CUSTOMER SUPPORT

  • Company
    • Company Presentation
    • Knowledge base
    • Careers
    • Spontaneous Application
    • Customer Service
  • Equipment Store
  • Contact

Leak Testing

A leak corresponds to the passage of a fluid or a gas for example, through a crack of a certain thickness in a wall.

This crack is usually complex, it does not follow a straight line and can have an evolutionary width between its beginning on one side and its end on the other.

A leak cannot technically exist if there is no pressure difference on either side of the “cracked” wall. This pressure can be the weight of a static liquid or the pressure of a compressed gas in need of escaping into the atmosphere, always from the area of higher pressure to the area of lower pressure.

To quantify a leak, we talk about its leakage flow, defined by the following formula:

Leak measuring machine manufacturer

It is therefore possible to calculate acceptable leakage flows, also called release threshold in the case of a test over a given period of time associated to an acceptable loss.

Manufacturere of leak control machines for the industry

A gas leak testing system using Helium gas, H2 gas, … includes, among other things:

  1. A tracer gas: both helium and hydrogen are used. Pure Helium can be used for more sensitivity or can be diluted for economic reasons. Hydrogen can only be used as a tracer in a diluted form, typically in nitrogen, up to 5% (5% H2 95% N2). Hydrogen will be limited to sniffing testing in the atmosphere (see below), for the reason that many materials release hydrogen under vacuum, thus interfering the measure.
  2. A leak detector: an essential mass spectrometer working under vacuum. The analysis cell is calibrated to detect and precisely quantify the helium or the hydrogen escaping from the tested products.
  3. Vacuum pumps or groups of vacuum pumps: whether it is for a vacuum test or for a sniffing test, the products to be tested will be evacuated using a primary pump before pressurizing them. Similarly, the vacuum chamber as part of a global test (see below) will have to be evacuated up to 10-2 or 10-3 for example, for a sensitivity of the order of 10-6atm.cm3/s.
  4. A frame: according to your requirements, it is composed of a mechanically welded frame of polycarbonate protective panels and aluminum profiles. It also supports other components such as vacuum pump groups, electrical cabinets, etc.

 

An Operator Interface for an optimal management of the system: a touch screen to control the machine’s automation, an additional flat screen to check the curves of the testing cycle (pressure, testing time, etc.), a LED light column for use in production… All configurations are possible.

Global Test

global leak testing principle
  1. The part is placed in a vacuum chamber
  2. The detector is connected to the chamber
  3. The chamber is evacuated
  4. The part is emptied from its air and then pressurized with helium
  5. The helium escapes from the chamber and is quantified by the detector.

Sniffing Test

Sniffing leaking control principle
  1. No vacuum chamber is required
  2. The part is pressurized with helium
  3. The sniffing probe is connected to the leak detector
  4. An operator goes through and around the chamber until leak detection.

Aspersion Test

Aspersion test leak machine principle
  1. The part is pumped by the detector itself or by a parallel pump
  2. The detector is therefore connected to the part to be tested
  3. The operator blows helium into the areas that may contain leaks
  4. The helium enters through the crack and is quantified by the possible detector.
Modul’He Leak Testing Equipment
CONTACT US

Contact

ALLIANCE CONCEPT
4 avenue du Pont de Tasset
CRAN GEVRIER
74960 ANNECY

FRANCE

Ph: +33 (0)4 50 57 93 85
Contact form

About us

fabricant d'équipements sous vide

Expert in vacuum technology for the design and the manufacturing of your PVD equipment, thin films deposition and leak detection.

Legal notices

Legal notices
Privacy policy

Copyright © 2020 Alliance Concept | Tous droits réservés.

Cleantalk Pixel