Hydrolytic Stability Testing Machine

HYDROLYTIC STABILITY OF HYDRAULIC FLUIDS ASTM D 2619   

• The sample of 75 gram of fluid plus 25 gram of water and a copper test specimen are sealed in a pressure type beverage bottle. The bottle is rotated, end for end, for 48 hours in an oven at 930C at 5 rpm.
• Consists of rotating type oven with digital temperature controller and beverage bottle rotating drive system with 5 RPM.
• Beverage bottle capacity 200ml
• Capacity to accommodate 2/4/8/12 bottles at a time.
• Power supply : 230 +10% Volt AC, 1 Phase, 50 Hz.

Test results
The test measures the following:

• Acid number change
• Total acidity of water
• Weight change of copper
• Appearance of copper strip
• Total sediment weight

Safety precautions
Because the test involves a glass bottle that can contain up to 200 kPa (2 atm) of air and water vapor at 93°C, it is recommended to wear a full face shield and heavy woven fabric gloves when handling the sample container.

Importance of hydrolytic stability
Hydrolytic stability is a fluid’s ability to resist chemical breakdown when exposed to water, which is a common contaminant in hydraulic systems.