Test Method
Covers the Assessment of the wear aspects of the boundary lubrication properties of aviation turbine fuels on rubbing steel surfaces.
Specification
Fluid Volume - 50 ± 1.0 mL
Fluid Temperature - 25 ± 10C
Fluid Ambient Temperature - + 5.0 to +35.00C
Conditioned Air - 10 ± 0.2% relative humidity at 25±10C
Flow rate through Fluid 0.5l/min
Flow rate over the fluid 3.3l/min
Fluid Conditionining Time - 15 min
Fluid Test Conditions - 3.8 L/min flowing over the fluid
Applied Load - 1000 g (500g weight) (±1g)
Cylinder Rotational Speed - 240 ± 0.5 rpm
Test Duration - 30 ± 0.1 min
Data Acquisition & Analyze - Motor speed, Fuel temperature, air temperature , humidity & test duration.
Test Ring - Dia 49.25 to 49.10, Thk 13.11 to 13 (SAE 8720 Steel, Hardness 58 to 62 Rc, surface finish Rq 0.51 to 0.71 micron).
Test Ball - 12.7mm (0.5 inch) (AISI 52100 Steel, Hardness 64 to 66 Rc)
Features
Description
The instrument consists of a rotating test ring against which a fixed test ball is pressed with the required force. A fuel bath containing the fuel under test is placed on – movable stage under the test ring. The temperature is controlled and the air is conditioned. Fuel under test is conditioned by maintaining the fuel temperature at 25°C maintained at 25°C with 10% Relative Humidity is passed through the test area which is enclosed. After conditioning of the fuel, a test ball of 12.7 mm diameter is pressed against the outer surface of the test ring. The lower part of the test ring i immersed in the test fuel bath. The test ball is pressed with a force of 10 N against the test ring. The test ring is made to rotate at 240 RPM for a period of 30 minutes after which the test stops. The wear scar on the test ball is studied and the scar diameters of the wear scar (major and minor axis) are measured. Data Acquisition Test parameters such as speed, test duration, fuel temperature, air temperature and humidity are acquired, displayed and recorded. The acquired data can be viewed in graphs. The data acquisition system provides the users with the facility to super impose up to four test graphs for comparative viewing.
Included Accessories
Electrical Requirements
230V, 50Hz, 2 KVA, 1 Phase, 1.5 KVA Max.
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