DIN 51805 Determination of Flow Pressure of Lubricating Greases; Kesternich Technique
Central lubrication systems typically offer reduced maintenance costs and increased reliability over conventional grease application methods. To start the grease flowing, pressure is applied to the system – lower temperatures normally require higher pressures than higher temperatures. This test determines the pressure required to start grease flowing at low temperatures.
The grease is packed into the test nozzle, brought to the test temperature and pressure is applied. The pressure is increased in 30 second intervals until grease passes through the nozzle. Reported is the flow pressure in mbar. Please include the test temperature.
Related low temperature flow tests: Petro-lubricant Testing Laboratories offers several tests to evaluate greases for use in central lubrication systems in low-temperature environments. To empirically determine the yield stress (pressure at which the grease starts flowing), consider DIN 51805 (Kesternich Technique) or K95400 (Lincoln Ventmeter). To empirically determine pumpability in moving greases consider LT-37 (Mobility of Greases). To evaluate apparent viscosity at varying shear rates consider ASTM D1092 (Apparent Viscosity).
Price: $235.00
Sample size: 100 g
Related tests:
- AAR M-914 ¶ 2.3.1 – Apparent Viscosity ASTM D1092 @ -40°F/ -40°C
- ASTM D1092 – Apparent Viscosity of Greases – 1 shear rate from 40°C to -73°C
- ASTM D1092 – Apparent Viscosity of Greases – 8 nozzles with graph from 40°C to -73°C
- K95400 – Lincoln Ventmeter, Room Temp to 0°C – need temperature
- K95400 – Lincoln Ventmeter, Below 0°C – need temperature
- US Steel LT-37 – Mobility of Greases U.S. Steel Method @ 77°F