Hydraulic module for a heat energy generation installation, comprising a liquid tank and a safety separator device, the hydraulic module comprising a fluid inlet and a fluid outlet, said safety separator device comprising: - a body defining a receiving cavity for a fluid comprising a gas and a liquid mixed together, the body comprising an inlet orifice for supplying fluid to the receiving cavity and an outlet orifice for discharging the fluid from the receiving cavity, - a separation member placed in the receiving cavity and designed to separate the gas and the liquid admitted into the receiving cavity, - a float valve placed in the receiving cavity and designed to be moved between: * a position in which the outlet orifice is open under the action of the liquid present in the receiving cavity to enable the liquid to flow from the inlet orifice through the outlet orifice, and * a position in which the outlet orifice is closed if the pressure of the gas inside the receiving cavity or gravity exerts a force on the float valve that is greater than the action of the liquid on the float valve, wherein the safety separator device is placed inside the tank, in a liquid discharge line of the tank, said discharge line opening into the inside of the tank at an aspiration orifice positioned in the top of the tank, the safety separator device being placed inside the discharge line, the hydraulic module further comprising a regulating member in fluidic communication with the receiving cavity to enable the gas to be discharged from the receiving cavity if the volume of gas inside the receiving cavity reaches a threshold discharge volume. - a body defining a receiving cavity for a fluid comprising a gas and a liquid mixed together, the body comprising an inlet orifice for supplying fluid to the receiving cavity and an outlet orifice for discharging the fluid from the receiving cavity, - a separation member placed in the receiving cavity and designed to separate the gas and the liquid admitted into the receiving cavity, - a float valve placed in the receiving cavity and designed to be moved between: * a position in which the outlet orifice is open under the action of the liquid present in the receiving cavity to enable the liquid to flow from the inlet orifice through the outlet orifice, and * a position in which the outlet orifice is closed if the pressure of the gas inside the receiving cavity or gravity exerts a force on the float valve that is greater than the action of the liquid on the float valve, wherein the safety separator device is placed inside the tank, in a liquid discharge line of the tank, said discharge line opening into the inside of the tank at an aspiration orifice positioned in the top of the tank, the safety separator device being placed inside the discharge line, the hydraulic module further comprising a regulating member in fluidic communication with the receiving cavity to enable the gas to be discharged from the receiving cavity if the volume of gas inside the receiving cavity reaches a threshold discharge volume. * a position in which the outlet orifice is open under the action of the liquid present in the receiving cavity to enable the liquid to flow from the inlet orifice through the outlet orifice, and * a position in which the outlet orifice is closed if the pressure of the gas inside the receiving cavity or gravity exerts a force on the float valve that is greater than the action of the liquid on the float valve,