Gas permeability tester VAC-V2 (EX)-H

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VAC-V2 (EX)-H Gas Permeability Tester is a differential-pressure method instrument designed to determine gas transmission rate and related permeability parameters for common gases as well as toxic, flammable or explosive gases. It is suitable for plastic films, composite films, high-barrier materials, sheeting and aluminum foils across varied temperatures.

Product Features

• Advanced split control system realizes complete separation of the tester mainframe and control module to ensure testing safety.
• Suitable for gas transmission rate determination of flammable, explosive or toxic gases.
• Performs permeability tests under normal pressure and high pressure conditions.
• Passed TUV safety certification.
• Three independent test cells enable testing of three identical or different samples simultaneously.
• Determines gas transmission rate, permeability coefficient, solubility coefficient and diffusion coefficient simultaneously.
• Wide-range & high-precision liquid circulation temperature controller supports tests under varied conditions.
• Dual testing process judgment patterns available: Proportional Mode and Fuzzy Mode.
• Data fitting at any temperature; test results under extreme conditions can be obtained easily.
• PC-controlled, allowing automated execution of the whole test process.
• Reference film available for rapid calibration to ensure accuracy and versatility of test data.
• Equipped with RS232 universal data port for data transfer.
• Compatible with Lystem Laboratory Data Sharing System for unified management of test results and reports.

Principle
The tester operates on the differential-pressure method: a pre-conditioned sample is clamped between an upper (higher-pressure) and lower (lower-pressure) testing chamber. The lower chamber is evacuated and the whole system evacuated; when the desired vacuum is reached the lower chamber is closed and the test gas at a set pressure is introduced to the upper chamber to create a constant, adjustable pressure difference. Gas permeates through the sample from the high-pressure side to the low-pressure side and permeability parameters are obtained by monitoring pressure changes in the lower chamber.

Standards
Conforms to: ISO 15105-1, ISO 2556, GB/T 1038-2000, ASTM D1434, JIS K7126-1, YBB 00082003

Applications

• Films: plastic films, plastic composite films, paper-plastic composite films, coextruded films, aluminized films, aluminum foils, aluminum-foil composite films, etc.
• Sheeting: engineering plastics, rubber and building materials (e.g. PP, PVC, PVDC).
• Various gases: O2, CO2, N2, CH4, H2, Air, He, H2, etc.
• Inflammable, explosive and poisonous gases: permeability testing for flammable/explosive gases.
• Biodegradable films: e.g. starch-based biodegradable bags.
• Materials for aerospace usage: e.g. Helium permeability testing of airship gas bags.
• Paper and paper board: paper and paper-plastic composites such as aluminized paper for cigarette packages, Tetra Pak sheeting, disposable paper cups.
• Paint films: substrates coated with paint films.
• Glass fiber cloth and paper: e.g. Teflon paint cloth, Teflon welding cloth, Teflon silicon rubber cloth.
• Soft tube materials for cosmetics: cosmetic tubes, aluminum-plastic tubes, toothpaste tubes.
• Rubber sheeting: various rubber sheeting (e.g. car tires).

Configurations

• Standard configurations: mainframe, thermostat controller, computer, professional software, special sampler, vacuum grease, fast quantitative filter paper, vacuum pump (inlet).
• Optional parts: sampling blade, vacuum grease, vacuum pump oil, rapid quantitative filter paper.
• Note: air source inlet is a 1/8" metal pipe; gas sources must be supplied by the user.

Technical specifications

• Test range (standard volume): 0.05 to 50,000 cm3/m2·24h·0.1MPa
• Test range (extended volume): 0.05 to 1,000 cm3/m2·24h·0.1MPa
• Number of specimens: 3 pieces (with respective data)
• Vacuum resolution: 0.1 Pa
• Vacuum degree of test chamber:
• Temperature range: 5°C – 95°C
• Temperature accuracy: ±0.1°C
• Specimen size: Φ50 mm
• Test area: 5 cm2
• Test gas (not supplied): H2, O2, N2, CO2
• Test pressure: 100 kPa ~ 3000 kPa
• Gas supply pressure: 0.5 MPa ~ 0.6 MPa
• Port size: 1/8" metal tube
• Instrument dimension: 760 mm (L) × 575 mm (W) × 450 mm (H)
• Power supply: 220 VAC 50 Hz
• Net weight: 88 kg