DIN 51805 PDF

The original and time-consuming method is fully automated and the measuring range is extended far below the original one, resulting in a considerably improved test precision. A powerful two stage Peltier element avoids the use of a large and expensive cryostat. The principle of the test is based upon the necessary pressure build-up to press an amount of grease through a standard test nozzle at a preset temperature. The measuring range is extended far below the original test method.

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The original and time-consuming method is fully automated and the measuring range is extended far below the original one, resulting in a considerably improved test precision. A powerful two stage Peltier element avoids the use of a large and expensive cryostat. The principle of the test is based upon the necessary pressure build-up to press an amount of grease through a standard test nozzle at a preset temperature. The measuring range is extended far below the original test method.

No further accessories are necessary. Further the expected flow pressure and the pressure increase for each step. The test is performed fully automatically. When the test temperature is reached, the equilibrium time of up to two hours is started.

After the equilibrium time, the pressure above the sample nozzle is increased in steps until a sudden pressure decrease is observed, indicating that the grease is pressed through the nozzle. The test is stopped and the last pressure value is displayed as the flow pressure according to Kesternich. This property can best be measured according the method of Kesternich. Principle The instrument has a standardized measuring nozzle 1 and a thermostatic block 2. The measuring system is firmly closed with a seal stopper 3.

At the bottom there is an Eppendorf flask receiving the grease after the test and 4 to avoid condensation of water inside. The test pressure is generated by a motor-driven piston 6 and measured with a precision pressure transducer 5. For lower temperatures the heat exchanger can be cooled with tap water. By continuing to use the site you agree to our privacy and cookie policy. This test method is suitable for temperatures at which no grease leaks out of the test nozzle.

DIN Testing of lubricants; determination of flow pressure of lubricating greases, Kesternich method. Contact Us. Product Registration.

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First Name. Last Name. The Low Temperature Flow Tester, K, has been developed for testing lubricating greases in low temperature environments. The test is performed in accordance with DIN and can also be customized. The core components are in accordance with medical standards to ensure highest precision and accuracy even in very low-pressure ranges. An easy to use touch screen interface helps to operate and use the machine in a quick and professional way.

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