The foam tester allows the determination of the foaming characteristics of lubricating oils at specific temperatures by empirically rating the foaming tendency and the foam stability. Especially in high-speed gearing and high-volume pumping systems, the tendency of oils to foam can lead to inadequate lubrication or cavitation, which may result in mechanical failure. For a more convenient workflow the foam tester comprises two individually maintained baths.
ASTM D892 (sequence I – III), ASTM D6082 (sequence IV), ISO 6247, JIS K 2518, IP 146
24 °C to 150 °C
1 to 8
Sequence IV equipment
Foaming can be a problem in gears and pumps, leading to mechanical failure. The foam tester determines the foaming characteristics of lubrication oils. The sample is blown with air at 24 °C and the foam is allowed to settle for 10 minutes. The volume of foam is measured before and after. The test is repeated at 93.5 °C. This is a required test method to certify turbine oils and is used for evaluation purposes.