Diffusion tester VAC-V2 (EX)

solubilitygas permeabilitypermeability

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

Product Features

• Labthink 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; TUV safety certified.
• Three independent test cells allow simultaneous testing of three identical or different samples.
• Simultaneous determination of gas transmission rate, permeability coefficient, solubility coefficient and diffusion coefficient.
• Wide-range, high-precision liquid circulation temperature controller supports tests under varied conditions.
• Dual test-process judgment modes available: Proportional Mode and Fuzzy Mode.
• Extendable testing range to accommodate high transmission-rate materials.
• Data fitting at any temperature enables results under extreme conditions.
• PC-controlled system for fully automated test sequences.
• Reference film available for rapid calibration to ensure data accuracy and comparability.
• RS232 universal data port for data transfer; compatible with Lystem Laboratory Data Sharing System.

Principle

• The instrument uses the differential-pressure method: a pre-conditioned sample is clamped between an upper testing chamber (higher pressure) and a lower testing chamber (evacuated). After evacuating the lower chamber and system, the upper chamber is flushed with test gas to establish a constant adjustable pressure difference. Gas permeates through the sample into the low-pressure chamber and permeability parameters are obtained by monitoring pressure changes in the lower chamber.

Standards

• ISO 15105-1
• ISO 2556
• GB/T 1038-2000
• ASTM D1434
• JIS K7126-1
• YBB 00082003

Applications

• Basic 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 construction sheeting (e.g. PP, PVC, PVDC).
• Extended Applications
• Various Gases: O2, CO2, N2, CH4, H2, air, He and other gases.
• Inflammable, Explosive and Toxic Gases: permeability testing for flammable/explosive/toxic gases.
• Biodegradable Films: e.g. starch-based biodegradable bags.
• Aerospace Materials: helium permeability testing for airship gas bags and similar components.
• Paper and Paperboard: aluminized paper, Tetra Pak sheeting, disposable food containers and cups.
• Paint Films: substrates coated with paint films.
• Glass Fiber Cloth and Paper: e.g. PTFE-coated fabrics, welding cloths, silicone rubber cloths.
• Cosmetic Tube Materials: cosmetic tubes, aluminum-plastic tubes, toothpaste tubes.
• Rubber Sheeting: various rubber sheets (e.g. tire materials).

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, fast quantitative filter paper.
• Note: The air source port is a Φ6 mm polyurethane tube; gas supply must be provided by the user.

Technical specifications

• Test range (standard volume): 0.05 to 50,000 cm³/m²·24h·0.1MPa
• Upper limit (extended volume): ≥ 500,000 cm³/m²·24h·0.1MPa
• Number of specimens: 3 (independent data for each)
• Vacuum resolution: 0.1 Pa
• Vacuum degree of test chamber:
• Temperature range: 5℃–95℃
• Temperature accuracy: ±0.1℃
• Specimen size: Φ97 mm
• Test area: 38.48 cm² (Φ70 mm)
• Test gases: H2, O2, N2, CO2 (gas supply outside scope)
• Test pressure: 10 kPa ~ 200 kPa (standard)
• Gas supply pressure: 0.5 MPa ~ 0.6 MPa
• Port size: Φ6 mm PU tubing
• Instrument dimensions: 760 mm (L) × 575 mm (W) × 450 mm (H)
• Power supply: 220 VAC 50 Hz
• Net weight: 88 kg