Graph of chiller performance curve. Most of these coolants work with standard-model chillers. If your instrument uses DI water, which is aggressive toward many materials, you will need a chiller that has only DI-resistant materials in contact with the coolant. Also, the chiller should be equipped with a deionization cartridge capable of maintaining the required resistivity level. Flow rate and pressure.
Many chillers come with a positive-displacement pump as standard equipment.
This type of pump, as its name implies, produces the same flow rate, regardless of the pressure it is pumping against. Other pumps, such as the centrifugal pump, are pressure dependent and will produce a higher flow rate at lower pressures. Your chiller vendor can help select the appropriate pump for your application, taking into account that some pumps have longer operating lives than others. You may need a lower flow or pressure than that provided by one of the available pumps. In this case, the chiller vendor should be able to provide an optional flow bypass loop.