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.

31 May 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 May 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 May 2012

What is special about refrigeration oil?

I was once told by the CEO of an oil company that refrigeration oil represents only about 3 to 4 percent of total business. The market for refrigeration oil is indeed small, but very demanding in terms of technology and procedures. Users who overlook important oil-related issues often later face technical problems with their machines and possible production disruptions. Thus, oil manufacturers and sellers need to be aware of the refrigeration industry’s needs, and at the same time users need to know what to look for on the refrigeration oil market.

18 August 2011

Improved oil analysis method for refrigeration compressors

The current, standard oil analysis method involves observing only the lubrication qualities of unused oil and then compares these results with a data sheet. The results are based on:

  • Water content
  • Particle counting
  • Viscosity at 40°C

16 June 2011

The foundation of the alternative refrigeration oil

We pointed out in our latest expert advice that Shell is going to discontinue the production of the Clavus 68 and G 68. Shell sold the production lines to the German company Fuchs, which means that the Shell 68 and G 68 will no longer be available for distribution. Shell now recommends the Clavus S (2V) and Clavus AB (4V) oils as alternatives.