6 Rev 007, 04/12
© SP Scientific 2012
Selecting a Process Fluid
This recirculator is designed for operation with a host of industry standard fluids. The
fluid you choose will depend on what temperature range is required. Ethylene Glycol
and water (60/40 mix) is an inexpensive and readily available fluid for –25°C to +60°C.
For a fluid outside this temperature range, SP Scientific suggests using HT-30
Silicone Oil for –60°C to +100°C.
There are other fluids available, but to avoid potential application problems and to
speed troubleshooting; it is suggested that one of the fluids mentioned above be used.
DO NOT USE AUTOMOTIVE ANTI-FREEZE (it contains clotting agents). If for some
reason one of the above fluids is not suitable, and you select a different one, be sure
that it has a viscosity of less than 20 centistokes over the full temperature range of the
unit.
Note: All of the above mentioned fluids have viscosity of less than 20 centistokes across their
useable temperature ranges.
Since most systems have capability to achieve temperatures below 0°C, water should
not be used as a process.
Ethylene Glycol/Water (60/40 mix)
HT-30 Silicone Oil (Recommended)
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