Expert advice

Expert Advice is a column written by Martin Wierbosch, CEO of RM Support. Martin is well known for his expertise on the refrigeration compressors and out of box thinking.

He is passionate about his work and continually searches for better solutions. Follow Martin on LinkedIn and Twitter

This column is intended to help you to overcome the problems you face while dealing with refrigeration compressors.  If you would like to suggest the subject for the next column, let Martin know by sending him an email.
21
februari
2017

New development

As a Fan of Twin rotor Compressors I love new developments. The last 6 months I have noticed nice developments on the market, I pleased me to see that new innovations coming into the market.

19
februari
2013

PAO vs. 2-stage hydrocracked base oil

PAO and mixture thereof with AB base fluids are most known and popular lubricants in the refrigeration industry, even though PAO alone shows some better results in the area of solubility with ammonia and volatility. Modern producing techniques lead to development of the 2-stage hydrocracked base oils that have even better attributes than PAO and therefore became very suitable for the lubrication in refrigeration. 2-stage hydrocracked base oils are highly recommended for ammonia applications.
31
mei
2012

What is viscosity

Viscosity is generally considered the most important property of a lubricant. What is it? And why should it matter to you?

Simply put, the viscosity of a lubricant (or any fluid) is a measurement of its resistance to flow. This example illustrates the concept: Suppose you have two glasses, one filled with water and the other with honey. If you were to tip the glasses over, the water would spill out of its glass faster than the honey. The honey has a higher resistance to flow, a higher viscosity, than water.

31
mei
2012

The lubrication process

The right viscosity is vital for a proper, protective cushion

Lubrication is essential for keeping machines running. When a lubricant properly cushions moving parts and prevents metal-on-metal contact, it minimizes friction and wear. This reduces maintenance costs and downtime, and it can prolong equipment life. However, achieving proper lubrication can prove challenging. Many factors can affect the development of the protective cushion (also known as an oil wedge), including the application’s operating speed and load, and especially the lubricant’s viscosity. Understanding their interplay may help you ensure optimal lubrication and protection for your equipment.

31
mei
2012

Viscosity index

One tool to simplify the viscosity challenge

Viscosity, a fluid’s resistance to flow, is a critical factor to consider when selecting a lubricant. If the viscosity of a lubricant is too low or too high for the application, serious problems may result. Adding to the challenge, temperature fluctuations can affect the viscosity of a lubricant in use — sometimes substantially. Viscosity index (VI) offers a way to evaluate to what extent a lubricant’s viscosity is impacted by temperature changes.