Grasso Compressors

We at Grasso believe that Reciprocating Compressors are metaphorically the crocodiles of the technological ecosystem of compressors, especially when they are observed with respect to its application in the HVAC industry, not just because the early air compression technology began with the use of reciprocating compressors but even today Reciprocating compressors remain at the top as the most widely used technology.

Even though scientific advancements introduced many new technologies in compressors that fiercely compete within the market one may note that reciprocating compressor as a technology has remained essentially unchanged over the decades, except for some new augmentations or the change in the material used as well as the way the constituent parts are manufactured.

A reciprocating compressor is characterized by a crankshaft attached to a piston, thus they are also known as piston compressors. The crankshaft is attached to a motor that causes the piston to moves back and forth along a straight line within a cylinder just as seen in a combustion engine. The strategic placement of the inlet and exhaust valves result in the suction of air or gas into the cylinder when the piston moves outwards, whereas compressing and pushing the pressurised air out of the cylinder when the piston moves inwards, this is.

When the cylinder has an assembly of a crankshaft that attached with a piston on one end it is called single acting and when the pistons are on both the ends it is called double acting assembly. A cylinder is called a stage, when using a single motorized shaft, multiple cylinders can be operated along a parallel sequence, this mechanical assembly is called multi stage compressor.

The reciprocating compressor’s main feature is its ability to give a high value compression ratio (Discharge : Suction) of air pressure, even if the flow rate value is comparatively small. Thus the multistage compressor can easily give us options of multiple differential values of compression ratio as, the assembly of two, three, four, six, eight cylinders, etc. are possible. The GRASSO V SERIES compressors provide each of these options but RC611, RC612, RC911 and RC912 compressor models are the favourites worth mentioning.