Technifab cryogenic phase separators convert two-phase, higher pressure liquid nitrogen (usually from a bulk tank) to a saturated, lower pressure and colder liquid.
Cryogenic liquid flows into the phase separator, where its velocity and saturated pressure is reduced. The liquid reaches saturated pressure by evaporative cooling. In this quiescent state, gas bubbles in the fluid rise to the top of the liquid bath and exit through the vent system. This process is accelerated through a special patented device to facilitate rapid evaporation on some models.
The resulting cryogen is nearly 100% liquid and has an extremely repeatable cooling capacity per pound. This repeatability is particularly important in electronic testing applications. If required, a single phase separator can be installed on each user device, or one large phase separator can be utilized to supply high quality liquid to multiple devices.
A Programmable Logic Control (PLC) controls the phase separator valve(s) to maintain a consistent liquid level and pressure. A PLC, especially on the PS-22/42/67 Models, offers additional flexibility to better control and tailor cryogen output to user needs. By adjusting the storage pressure within the phase separator to meet the needs of the use-point equipment, the optimal balance between storage pressure and liquid temperature can be achieved.
The addition of a phase separator can also be used to eliminate the need for two supply tanks in some cases. High-pressure gas needs can be met by using the gas vapor space at the top of the bulk tank. The high-pressure liquid is taken from the bottom of the tank and piped to the phase separator, where it is cooled by very rapid evaporation producing a saturated low pressure and temperature liquid.