A solar receiver heat transfer pressurized fluid system includes: a pressure relief valve; and a trapping device for separating liquid droplets from a pressurized gas released by the pressure relief valve and to capture the liquid droplets. The trapping device includes: a horizontal pipe; a liquid trap element extending from the horizontal pipe for catching separated liquid droplets; and a vertical exhaust pipe connected to the horizontal pipe substantially in a perpendicular manner and having an open end for discharging in atmosphere the pressurized gas released by the pressure relief valve. The horizontal pipe includes a first connection means for removably connecting at a first end to the pressure relief valve and a second connection means for removably connecting at a second end to the liquid trap element. The vertical exhaust pipe is connected to the horizontal pipe between the first end removably connectable to the pressure relief valve.