A compressor system comprising: - at least a first compressor having a suction side and a delivery side; - an anti-surge line comprising an anti-surge line inlet and an anti-surge line outlet; - a gas feeding line extending from the anti-surge line outlet toward the suction side of the first compressor; - an anti-surge valve arranged along the anti-surge line between the anti-surge line inlet and the anti-surge line outlet and controlled for recirculating a gas flow from the delivery side to the suction side of the first compressor; - a heat removal arrangement (61; 66) arranged between the anti-surge valve and the suction side of the first compressor; wherein the heat removal arrangement comprises an anti-surge cooler comprised of at least one heat exchanger arranged between the anti-surge valve and the outlet of the anti-surge line upstream of the suction side of the compressor, between the anti-surge valve and the gas feeding line, and in heat exchange relationship with a cooling medium; the anti-surge cooler being configured and arranged to remove heat from gas flowing from the anti-surge valve to the first compressor; and a quench valve, which is fluidly coupled to a reservoir (19; 9) containing a condensed gas separated from the gas processed by the first compressor and delivered at the quench valve at a pressure higher than a gas pressure at the suction side of the first compressor; wherein the quench valve is further fluidly coupled between the anti-surge valve and the suction side of the first compressor; and wherein the quench valve is arranged and controlled for spraying a flow of said condensed gas in a gas stream flowing through the anti-surge line. - at least a first compressor having a suction side and a delivery side; - an anti-surge line comprising an anti-surge line inlet and an anti-surge line outlet; - a gas feeding line extending from the anti-surge line outlet toward the suction side of the first compressor; - an anti-surge valve arranged along the anti-surge line between the anti-surge line inlet and the anti-surge line outlet and controlled for recirculating a gas flow from the delivery side to the suction side of the first compressor; - a heat removal arrangement (61; 66) arranged between the anti-surge valve and the suction side of the first compressor; wherein the heat removal arrangement comprises an anti-surge cooler comprised of at least one heat exchanger arranged between the anti-surge valve and the outlet of the anti-surge line upstream of the suction side of the compressor, between the anti-surge valve and the gas feeding line, and in heat exchange relationship with a cooling medium; the anti-surge cooler being configured and arranged to remove heat from gas flowing from the anti-surge valve to the first compressor; and a quench valve, which is fluidly coupled to a reservoir (19; 9) containing a condensed gas separated from the gas processed by the first compressor and delivered at the quench valve at a pressure higher than a gas pressure at the suction side of the first compressor; wherein the quench valve is further fluidly coupled between the anti-surge valve and the suction side of the first compressor; and wherein the quench valve is arranged and controlled for spraying a flow of said condensed gas in a gas stream flowing through the anti-surge line.