An apparatus for providing a liquid cryogen with pulsed flow includes a first tank 14 containing liquid cryogen； a second tank 16 containing gaseous cryogen under pressure, the second tank in fluid communication with the first tank and including an outlet； and a pair of valves including a first valve 70 disposed to alternate between interruption and continuance of the fluid communication between the first and second tanks, and a second valve 74 disposed for coaction up to 180° out-of-phase with the first valve to repetitively cycle between pressurizing and releasing pressure of the liquid cryogen for providing discrete pulses of the liquid cryogen from the outlet. A related method is also provided.
