Test Method
Determines the resistance of lubricating grease to flow under prescribed conditions. Mobility is measured in grams per second by pumping the sample through a standardized SOD pressure viscometer at controlled temperature and pressure.
Specifications
Conforms to the specifications of:
U.S. Steel Method; ASTM Draft Method
Minimum Temperature:–30°F (–34.4°C)
Control Stability:±2°F (±1°C)
Description
Performs grease mobility tests at low temperatures to predict pumpabilitycharacteristics. Determines the suitability of greases for applications incentralized or bulk systems where pumps, valves or pipes are used todistribute or transfer grease. Consists of pressure viscometer, coolingbath and refrigeration system. The stainless steel pressure viscometer isfitted with a modified No.1, 40:1 ratio capillary. After the sample is loadedin the pressure viscometer, the assembly is installed in the cooling bathand allowed to reach the test temperature. Mechanically refrigeratedcooling bath can attain test temperatures as low as –30°F (–34.4°C) withstability of ±2°F (±1°C). With the sample at the test temperature, the flowof grease is started under the selected pressure on a nitrogen tankregulator. Flow per second is determined by collecting the grease for aspecified period. Includes sample collector turntable.
Alat Laboratorium Umum