In PET and SPECT systems, cooling both the cyclotron equipment and the detector banks in the imaging systems is required. Temperature control within the cyclotron system is critical for operational integrity, performance accuracy and system reliability. Liquid cooling systems are often the preferred choice to control the temperature of the imaging system. Cyclotrons require around 80 kilowatts of cooling with 120 liters a minute of liquid flow, while PET and SPECT systems have a heat load range of 1~5KW. In addition, components with PET and SPECT imaging gantry systems are subject to tremendous rotational speeds and acceleration forces (G-forces). As a result, liquid pumps must be able to maintain constant flow and pressure while under stress caused by high g-forces.