A system for delivering a cryogenic fluid fuel at a predetermined saturation pressure to a fuel tank, the system comprising: a source tank with a top portion and a second portion, the source tank containing a fuel, the fuel comprising a gas portion and a liquid portion; a pump fluidly connected to the top portion of the source tank by a vapor line and the bottom portion of the source tank by a liquid line, the pump configured to pump the fuel from the source tank towards a vehicle fuel tank; an ambient temperature line with a first end connected to the outlet of the pump and a second end connected to a controlled inlet line; and a temperature sensing valve controller connected to: a cold fuel control valve; a warm fuel control valve; and the controlled inlet line; the temperature sensing valve controller being configured to measure a temperature of the fuel in the controlled inlet line and control the flow of fuel through the cold fuel control valve and warm fuel control valve to maintain the temperature of the fuel in the controlled inlet line within a predetermined temperature range, characterised in that - the system further comprises a cooling component configured to surround a cooling line with a cooling cryogenic fluid, the cooling line being fluidly connected to an outlet of the pump at a first end and to the controlled inlet line at a second end, the controlled inlet line in fluid communication with the vehicle fuel tank; and in that - the cold fuel control valve is located at the second end of the cooling line; and in that - the warm fuel control valve is located at the second end of the ambient temperature line. a source tank with a top portion and a second portion, the source tank containing a fuel, the fuel comprising a gas portion and a liquid portion; a pump fluidly connected to the top portion of the source tank by a vapor line and the bottom portion of the source tank by a liquid line, the pump configured to pump the fuel from the source tank towards a vehicle fuel tank; an ambient temperature line with a first end connected to the outlet of the pump and a second end connected to a controlled inlet line; and a temperature sensing valve controller connected to: a cold fuel control valve; a warm fuel control valve; and the controlled inlet line; the temperature sensing valve controller being configured to measure a a cold fuel control valve; a warm fuel control valve; and the controlled inlet line; the temperature sensing valve controller being configured to measure a temperature of the fuel in the controlled inlet line and control the flow of fuel through the cold fuel control valve and warm fuel control valve to maintain the temperature of the fuel in the controlled inlet line within a predetermined temperature range, characterised in that - the system further comprises a cooling component configured to surround a cooling line with a cooling cryogenic fluid, the cooling line being fluidly connected to an outlet of the pump at a first end and to the controlled inlet line at a second end, the controlled inlet line in fluid communication with the vehicle fuel tank; and in that - the cold fuel control valve is located at the second end of the cooling line; and in that - the warm fuel control valve is located at the second end of the ambient temperature line. - the system further comprises a cooling component configured to surround a cooling line with a cooling cryogenic fluid, the cooling line being fluidly connected to an outlet of the pump at a first end and to the controlled inlet line at a second end, the controlled inlet line in fluid communication with the vehicle fuel tank; and in that - the cold fuel control valve is located at the second end of the cooling line; and in that - the warm fuel control valve is located at the second end of the ambient temperature line.