Reciprocating compressors are generally used for low flow and high pressure. The gas flow rate in this type of compressors reaches from low values to 5000 m3/hr and with it you can achieve very high pressures (up to 6000 bar). In compression ratios higher than 1.5, these compressors have higher efficiency compared to other types of compressors. Reciprocating compressors are basically among machines with fixed capacity, but in special conditions, its capacity can be changed according to the desired conditions. The biggest advantage of these compressors compared to other types used in industries (rotary and centrifugal) is its high overall efficiency and the ability to achieve high pressures.