The piston compressor

Riem Italy, a company specialized in reparation and spare parts of industrial compressors, stands out on the market for its ability to offer highly professional and quality overhaul services. These also include the overhaul of piston compressors. Let’s find out what a piston compressor is and for what reasons it is normally used. 

The piston compressor: what is it?

To introduce the concept of piston compressor, first it is necessary to know the basic principles of air compression: volumetric compression and dynamic compression. In the first case, the air is sucked into closed compression chambers and, as the volume of these chambers decreases, the air is compressed inside them. Once the desired compression ratio is reached, a valve is opened, allowing  air to drain into the outlet system. In the second case, however, the air is sucked between the blades of a rotating impeller and accelerates until it reaches high speed. Once the desired speed is reached, the air is discharged into the diffuser and the kinetic energy is transformed into static pressure. The piston compressor falls into the category of volumetric compressors; therefore, the principle of volumetric air compression is applied to them. The piston compressor is among the most widespread  used by the industrial sector and can be, as we have seen in our previous article, oil-free or lubricated. 

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They can be configured in very different ways depending on their size and versions, a piston compressor can in fact be single or double effect and can have more or less cylinders.  A small compressor, for example, will have a V cylinder configuration, while in case of medium sized compressors, cylinders are vertical. A large compressor, on the other hand, uses an L configuration with a low-pressure vertical cylinder and a high-pressure horizontal cylinder.  The oil-free piston compressor, the most used, is equipped with piston rings generally in filled Teflon and, for the biggest ones, the configuration sees the presence of seals on the piston rods. Smaller machines, instead, use sealed bearings. 

The overhaul of piston compressors by Riem Italy

Riem Italy takes care of overhauling to zero hour piston machines of either lubricated or oil free compressors, high and low pressure. Riem also carries out maintenance services thanks to an expert technical staff made up of an experienced and qualified team. In the event that some pieces cannot be overhauled due to their state of wear, Riem can take care of their replacement with new pieces. Each overhaul work has one-year warranty.