Determination of the Flow Pressure Measurement of Semi-solid Materials in Low Temperature Environments
Dr. Raj Shah - Koehler Instrument Company, Inc.
- Stanley Zhang - Koehler Instrument Company, Inc.
- Stefan Lim - Koehler Instrument Company, Inc.
Semi-solid substances such as lubricant greases are predominantly used to establish lubricant films on equipment in order to increase mobility and limit frictional wear. In low temperature environments, the viscosity of grease increases to such a degree that it hardens and ceases to flow. Low temperature greases are designed to maintain functional viscosity and lubricity at extreme negative temperatures. Currently, a few experimental techniques, such as the US Steel Grease Mobility, the Lincoln Ventmeter, and the Apparent Viscosity of Lubricating Greases (ASTM D1092) Methods are used to study the low temperature properties of greases. DIN Method 51805, also called the Kesternich Method, has been used in Europe to gain a better understanding of low temperature properties of greases. In this poster, we study the development of a new instrument used to test the low temperature flow of greases in accordance with the Kesternich Method. We evaluate a wide range of semi-solid materials and greases and compare their low temperature properties with the newly developed instrument and attempt to generate a new test procedure along with detailed statistics for this unique technique.