R134a Coolant Pump for 2-Phase Liquid Cooling System P-266


A multinational industrial equipment supplier needed a coolant pump for a patented, two-phase evaporative precision cooling system.  The system uses a non-conductive refrigerant (R134a) to transfer heat in a modularized cold-plate, rack ready design targeted mainly for Data Center cooling applications.

Our customer’s primary technical challenges were related to develop a very high reliability positive displacement pump to handle a very low viscosity, low lubricity R134a refrigerant, similar to a smaller 2-phase pump previously designed by Cascon.



Cascon’s CS-266 pump is optimized for our customer’s high density cooling system rated for 200KW.  The pump responds dynamically to changes in heat load via an input command voltage to the electronic motor control that provides a variable, proportional, flow rate response.  The design strategy leverages Cascon’s experience developing hermetic and semi-hermetic, positive displacement pumps for aerospace and other mission critical applications.  The design features a custom designed gerotor pumping element and bearing system, with integral 3phase 460V AC hermetic motor.  The motor rotor and stator operate flooded in the working fluid to eliminate rotary seals; the design uses only static o-ring seals.  A hermetic feed-through interface plate provides electrical connectivity between the wetted motor-rotor cavity and the electronic motor control. The pump is made in the USA.

Select Performance Data:

Fluid: R-134A
Flow Rate: 25 GPM
Temperature Range: -20 degF to +150 degF
Pressure Rise: 100 psid
Operating Voltage: 460 VAC, 3-Phase
Burst Pressure: 1550 psi
Agency Compliance: ROHS, UL, ANSI
Design Life: 50,000 hours


For High Density Cooling System


Coolant Pump, Made in the USA