Fluorinated cleaning, heat-transfer and vapor-phase fluids

• Define cleaning, single-phase circulation or vapor-phase processing before choosing a family and operating window.
• Compare boiling behavior with actual system pressure; a catalog boiling value is not a continuous-use temperature limit.
• Check viscosity and density at the same temperature, then review the heat-capacity and conductivity units used in equipment calculations.
• For electronics, obtain the required dielectric test method, moisture and contamination criteria for the selected grade.
• Include plastics, seals, metals and electronic assemblies in the compatibility trial rather than relying on the fluorinated family name.

VN-FL-1023 lists boiling points of 59, 76, 98, 100, 43 and 76°C in G01–G06 order. Its vapor-pressure row is specified at 20°C, while density and viscosity are at 25°C. Keep these conditions distinct. Compare drying and solvent recovery in the actual equipment; the fluid used to clean a pump is not automatically the lubricant that should remain in it.

VN-FL-1034 lists boiling points from 110 to 270°C across seven grades, with 25°C viscosity from 0.75 to 16 cSt. Specific heat is recorded as 0.23 cal·g⁻¹·°C⁻¹, not J·g⁻¹·°C⁻¹. Dielectric-strength units and current moisture and acid-value limits require confirmation. VN-FL-1035 instead provides grade-specific boiling ranges; G06, for example, lists 210–230°C.

For cleaning, use representative contaminated parts and compare removal, retained residue, drying time and surface appearance with the current process. Inspect sensitive polymers, seals and coatings after exposure. Track bath loading and the recovery method so the result represents repeated operation rather than only a fresh-fluid test.

For heat transfer, record circulation conditions, inlet and outlet temperatures, pressure behavior and material compatibility. For vapor-phase soldering, measure the actual assembly thermal profile against the solder alloy and component limits. If performance drifts, examine contamination, moisture, fluid loss and equipment conditions before changing the grade. Define sampling and fluid-condition checks as part of the trial.