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Block Oven Aging Check

Thermal regulated Block for the performance of ageing tests in air and in liquids of elastomeric materials at temperatures up to 250°C

Thermal regulated Block for the performance of aging tests in air and in liquids of elastomeric materials at temperatures up to 250°C conforming to ISO 188, 1817 ASTM D 471 and 865 Standards.
Aging tests are typically carried out to measure the variation of characteristics of an article before and after the aging process. The characteristics that are most frequently measured before and after aging are:
• Variation of mechanical characteristics (loading, lengthening, tearing)
• Variation of hardness
• Percentage variation of mass and volume.
Gibitre, in addition to providing this tool to perform accelerated aging in air or in liquid, also provides the tools to measure changes in the properties of the article and to produce the related reports.
Instruments Characteristics  
The instrument is fitted with:
• Aluminium block contained in a stainless steel housing with thermal insulation with 4 calibrated holes designed for the insertion of 4 glass test tubes
• Heating resistance
• PT 100 thermal probe for temperature measurement
• PID thermoregulator
• Timer for the set of the heating time with automatic switch off of the heater at the end of the set time

The instrument is equipped with a timer that can be set between 0 and 99 hours and 59 minutes. The instrument automatically stops at the end of the set test time.
The Timer allows you to activate aging cycles by ending the test automatically in the absence of the operator.

Glass Tubes for samples. 
4 glass tubes with a diameter of 38 mm and a length of 300 mm can be inserted into the instrument.
The specimens can be inserted into the glass tubes and locked using the fasteners provided.
Fixing devices allow the specimens to be placed in order to avoid contact with the glass tube walls.
Glass Tubes for test according to ASTM D865 
The glass tubes are closed in the upper part with PTFE plugs provided with holes for the insertion of the glass pipes requested for the aging test in hot air according to ASTM D865
Water-cooled reflux condenser 
For aging tests in volatile liquids it is necessary to use condensation columns connected to a water supply. The condensation columns allow to condense the volatile part of the test liquid and make it fall back into the tube. In this way, the amount and formulation of the liquid in the glasses will remain unchanged.
A condensation column can be applied to each test tube.

Removable Side Supports 
Together with the instrument are supplied two side supports for housing the glass tubes not in use. The supports can be removed to reduce the overall dimensions of the instrument.
Safety Devices 
• Safety switch to prevent overheating
• Safety Push-button
• CE Labelling

Standard Calibration service for a Block Oven 
The calibration is performed with reference to the requirements of ISO 1817 standard.
The service includes:
• Ordinary maintenance of the instrument
• Calibration of the temperature inside the testing tubes (at 70°C, 150°C, 200°C, 250°C).
• Issue and e-mail shipment of the Calibration Certificate with traceability to primary standards.

Sample Calibration Report

Development and production 
The instrument is totally developed and produced in the plant of Gibitre Instruments in Italy.
All the mechanical parts are produced in the company workshop using modern CNC machines.
Components and sensors from well-known brands are selected in order to ensure the maximum reliability in the measures
Internal trained personnel takes care of all the production stages: assembly, start-up, calibration, packing, shipment and installation.

Technical specifications
Reference Standards
Standards the instrument complies with:  VDA 675-301; ASTM D1056; ISO 6916-1; ISO 6916-2; AS_NZS 4179; ISO 188; ISO 1817; ASTM D471; ASTM D865; EN 681-1;  
Testing Configuration
Test stations  N° 4 glass tubes with 38 mm diameter and 300 mm length The use of individual test stations eliminate cross-contamination among different products under test  Heating system  The thermal resistance surrounding the round-shaped aluminium block ensures uniform heating of the system  Temperature control range  From room temperature to 250°C (Resolution 1 °C)  Vapour phase recovery  By condensation with water-cooled reflux condenser  Timer for set of test time  Timer with set of hours and minutes with automatic swiching off of the heating system at the end of the time 
Safety Devices
Safety devices  Safety Pushbutton.
safety thermostat for over-heating 
Labelling  CE Labelling 
Calibration  Calibration Report conforming to ISO 1817 with traceability to primary standards 
Technical specifications
Power supply  220 VAC ±10%, 50 Hz ±3, 10A, single phase - 110 VAC ±10%, 60 Hz ±3 on request.  Electrical power  1.5 kW  Dimensions  Instrument only: 400 x 420 x 360 mm
With test tubes holders: 490 x 420 x 360 mm
And with reflux condenser mounted: 490 x 420 x 860 mm 
Weight  24 Kg 
Related pages
Product leaflet

General catalogue

Calibration certificate
CE certificate


Does the volume of the glass tube of the instrument comply with International standards?
The ratio between the volume of the samples and the volume of the liquid in the glass has an important impact on the effect of the aging on the samples. ISO 1817 requires the volume of the liquid to be at least 15 times the volume of the samples. The volume of the glass used for Gibitre Block Oven is 317.000 mm3. Some examples of use: - The volume of 1 ISO 37 type 2 Sample is about 920 mm3. Using 3 samples in the glass: Liquid_Volume/Sample_Volume>117 - The volume of 1 ISO 37 type 1 Sample is about 4040 mm3. Using 3 samples in the glass: Liquid_Volume/Sample_Volume>78. Conclusion: the volume of the glass is fully conforming to ISO 1817 requirements
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