Due to their high accuracy, KRAL flowmeters are predestined for test benches. High-precision measurement results lead to reliable performance data of the unit under test, because the smallest measurement inaccuracies can have considerable consequences for the user.

The KRAL flowmeter was developed 40 years ago for the company’s  own pump test bench. Since then, it has been used in test benches worldwide and customers from a wide range of industries rely on it.

Pumps are often used in critical areas, meaning if they fail the consequences could be far-reaching. Testing on the test bench is therefore mandatory and ensures both run and  document product quality. 

Only when the pump has been certified by the inspection authority it is ready for use. These high standards are essential to provide security. 

In real operation, the maximum permissible flow rate for which the systems are designed is not permanently operated. In addition, fluid pulsations often occur. The values vary and often lie outside the specified flow rate value. However, many flowmeters only achieve the guaranteed measuring accuracy for a very small viscosity and flow rate range. Therefore the entire measurement result is often wrong.

This is different with KRAL flowmeters. The high measuring accuracy of ± 0.1 % is maintained over a wide viscosity and flow rate range. This is particularly important in test benches, as the entire performance curve of the test object is traced. Furthermore different sizes can be measured on the same test bench. This requires a wide measuring range. KRAL flowmeters are also extremely robust and insensitive to system vibrations and pressure pulsations and show the actual flow rate even under such conditions.

One customer said: “The  low viscosity, the high pressure load, low flow rates and high measuring precision under high safety requirements (explosion protection) prevent the use of turbine and gearwheel meters. For this reason, KRAL screw meters were used for flow measurement. Thanks to the high-resolution frequency measurement, outstanding repeatability and linearisation could be achieved across the entire flow range”.

For more information visit www.kral.at

9th June 2020