Water Condensation Test Chambers VLM

Compact and easy-to-use chamber with both top and front loading, they are designed for condensing moisture tests in accordance with many international standards.

Modular design, the ability to adapt to different test specifications, contributes significantly to the continuous improvement of systems designed for corrosion testing. High-quality technology that, combined with reliability, makes the VLMs low-maintenance and user-friendly.

Water Condensation Test Chambers (CON)

Since the condensation phenomenon occurs when the air temperature is lower than the dew point, it is essential to keep the temperature inside the test chamber in the condensation phase at a constant level as uniformly as possible.
VLM chambers for moisture condensation testing are therefore equipped with double insulated walls and a roof that protects the test area from conditions likely to affect the test results (eg airflow or direct exposure).

Moisture condensation test

The bottom of the test chamber is flooded with demineralised water and heated to +40°C (+60°C is also possible). Water evaporation causes high humidity conditions inside the chamber. The thermal losses through the chamber walls produce temperature gradient and consequently the dew point is reached in the vicinity of specimens and the vapor starts condensing on the surface of the test samples.

CWC – Controlled Water Condensation

In contrary to the Salt Spray Test where it is of interest that the test chamber is thermally perfectly isolated from the outside environment the proper Water Condensation test implies small but measurable heat losses particularly around the roof area. These heat losses result in a temperature gradient between the bottom and the roof of the test chamber which is required to reach the dew point inside the test chamber and consequently the water condensation.
VLM’s patented Controlled Water Condensation (CWC) system is able to accuratelly control the amount of heat losses through the roof resulting in the temperature gradient of exactly 1°C between the chamber roof and the its bottom.
The CWC system is the main prerequisite for achieving high reproducibility of test conditions and achieving reliable test results. Moreover, the stainless steel design of the test chamber and the surface heating elements allow high thermal conductivity and very fast heat transfer into the chamber. The water in the bath is heated quickly and evenly resulting in even evaporates acrsoos the whole water surface. The unwanted air turbulence are avoided which is also an important condition for an uniform water condensation.
The combination of all above measures for the controlled water condensation combined with the salt spray test in a single test chamber results in highly reliable VLM test chambers for Cyclic Corrosion Tests (CCT).

Advantages VLM Water Condensation Test Chambers:

• Rich choice of top and front loading test chambers for conducting water condensation tests also in combination with other corrosion tests,
• Volumes from 300 to 3500 litres,
• Possibility to making of Kesternich tests,
• High reproducibility of the test atmospheres,
• Overall compact design and steel construction of the test chamber,
• User friendly operation due to the versatile microprocessor controllers,
• Micanite flat heaters for fast and uniform heating of the test chamber,
• Variable speed fan for the aeration phase for controlling the drying time of specimens,
• Low total cost of ownership due to energy efficient design and low cost maintenance.

PARAMETRES

Front Loadnig Cabinets for Water Condensation Tests:

• Available capacities: from 300 to 3500 litres,
• Maximum working temperature: 60°C,
• Microprocessor control with LED Display resolution of Set-and actual value: 0,1°C,
• Temperature stability: ±0,2°K,
• Lockable door made of safety glass, windshield wiper solenoid,
• Cover made of stainless steel and / PE.

Top Loading Cabinets for Water Condensation Tests:

• Available capacities: from 600 to 1000 litres,
• Maximum working temperature: +55°C,
• Microprocessor control with LED Display resolution of Set-and actual value: 0,1°C,
• Temperature stability: ±0,2°K,
• Double-layered construction for excellent reproducible environmental conditions,
• Automatic filling of the water bath and maintain a constant water level in continuous operation.

Standards

• EN ISO 6270-2:2006,
• ASTM D2247,
• BS 3900 F2,
• BS 3900 F15.