Non-fired liquid nitrogen units are equipped with a non-fired vaporizer system. The nitrogen pumping units are available as skid, trailer or truck mounted package. Dependent upon customer specific needs, the diesel engine is determined by amount of horsepower needed. The diesel engine is used to drive the hydraulic system and in turn, the unit utilizes the waste heat from engine the coolant system and hydraulic oil circuits to vaporize liquid nitrogen. Designs are available with flow rates of up to 270K SCFH at max. pressures of 15,000 psi.