MyJHB

Stuff from Johannesburg

When zero is hero

Oil-free Compressor
Rand-Air’s Sales Manager, Kim Coetzee and Mpho Ngamlane, Industrial Plant Rental Account Manager together with a ZT 315 VSD oil-free compressor.

Oil-free compressed air is used throughout industry where the purest compressed air quality is critical to the end product and to the processes involved – such as in the pharmaceutical or food and beverage sectors, for example.

“As the leading provider of portable power and air solutions in the country, Rand-Air has the right solution for our customers, in that we are able to supply oil-free compressors which have a TUV Class 0 certification under the ISO 8573-1 standard. With this assurance, customers can have peace of mind that they are guaranteed 100% oil-free compressed air,” explains Rand-Air’s Fleet Manager Craig Swart.

The evolution of this stringent standard reflects the ever-increasing requirement for quality air for processes and end products. Class 0 is a more stringent industry standard where the total oil content is measured – not only aerosols and liquids but vapours as well – by the internationally recognised TUV organisation.

Rand-Air sources its oil free compressors from Atlas Copco, which put these units through the most rigorous tests available; and which is now the first manufacturer to receive Class 0 Certification for all its oil-free products.

“However, in the field of air compressors, there are two terms which need to be understood – Class 0 and technically oil-free,” continues Swart. The latter term means that oil is injected into the compressed air and then removed afterwards using a filtration process. This involves an oil separator in the compressor, coalescing filters to remove most liquid oil, and then an activated carbon filter to remove oil vapours.

With technically oil-free compressors, during the filtration process failures can potentially occur – for example, separators can break and filters can become saturated. These factors are exacerbated when the operating temperatures are high. When using a technically oil-free system, there are also other issues to consider such as ensuring that filters are regularly changed, treatment of the condensate and higher energy costs.

“At Rand-Air, all our PT-, PN- and Z- range of compressors are Class 0 oil-free, TUV-certified and we have a range of oil-free compressors to suit most applications,” he adds.

“So if your requirement is for oil-free compressed air, one has to ask: “Why take the risk of potential damage to equipment or reputation?” A Class 0 oil-free compressor from Rand-Air is your optimal solution,” Swart concludes.

Category: Tag:

The Rand Club: Jameson Raid

The Rand Club’s history is as exclusionary as it is grand. For most of its existence, it was a bastion of white, male, British-aligned power. It was famously the “nerve center” for the Jameson Raid in 1895—a botched coup attempt against Paul Kruger’s South African Republic that served as a precursor to the devastating Second Boer War. For nearly 100 years, women were not allowed to be members, and black South Africans were permitted only as staff. The club’s refusal to modernize its membership policies led to a slow decline in the late 20th century as the “new” Johannesburg moved to Sandton. By the early 2010s, the club was facing bankruptcy, its grand halls gathering dust and its membership dwindling to a few hundred traditionalists.