Archive for November 2012

Sampling Part 1: Why

Why Sample?

Thermal fluids usually don’t telegraph that they are about to fail. Generally the only hint of impending doom is some fall off in temperature control in the heat user which requires an increase in the heater temperature to compensate.  Once the power is shut off and the fluid cools however, it’s a very different story.  If the fluid turns to molasses when it cools, it makes startup very difficult. Not to mention that pulling apart piping is a very time consuming way to replace the fluid.
If you operate a thermal fluid system, it’s easy to understand why thermal fluids fail. Unlike other central energy sources (like steam boilers) thermal fluid heaters don’t require (key word REQUIRE) any routine maintenance – no chemicals to add, no blowdown tanks, no condensate traps to mess with. Once you get beyond the initial startup the heater just runs.


This absence of required maintenance activities frees up operators for the 10,000 other items that do require attention. Which is why periodic sampling of the fluid should become a required maintenance activity.  Even if the sample isn’t sent out for testing, simply examining the cooled fluid will give you a hint about the condition –  i.e. if it doesn’t pour out of the sample container when you tip it over, you’re in trouble. (Here’s another hint: If this happens, don’t shut off the system. Give us a call.)


Cooled Sample, No Longer Liquid

“If it doesn’t pour out of the sample container when you tip it over…”

The next tip will review why where and how you sample is important.


See Paratherm’s one-minute video on fluid sampling and testing here —
Heat Transfer Fluid Sampling

Product Spotlight: Paratherm NF® Food-Grade Heat Transfer Fluid

Paratherm’s heat transfer fluids are integral to a number of industrial sectors, including the meat, poultry, seafood, snack and baking. By using our Paratherm NF® Food-Grade Heat Transfer Fluid, our clients, their workers, and American consumers are safer and happier.

Food-grade heat transfer fluids are used as an alternative to direct-fire heating when frying, grilling, roasting and baking food products. There are many advantages, which include safety and more consistent heat transfer yielding superior products, and most importantly, safer food. When eliminating direct-fired heating in the cook process, the heat source can be moved to another room, making for better working conditions. Indirect heating with heat transfer fluids provides more precise temperature control, ensuring uniform, even cooking. And should there be a breach in equipment, there are no toxicity concerns when food-grade heat transfer fluids are used.

Nowadays, almost all meat and poultry plants that supply items to fast food chains (as well as frozen convenience products for home kitchens) throughout the country are using heat transfer fluids. Back in the 1990’s, when the technology was being developed, it was Paratherm NF® Food-Grade Heat Transfer Fluid they were using for the process development. Our product simply has the longest safety record in the industry—having been crucial to its growth—and therefore has the most certifications. Approved by the FDA and the USDA, it is also certified kosher, certified in three countries internationally, and passed bioassay testing with three fresh and saltwater organisms. Paratherm’s is the only food-grade heat transfer fluid with such extensive toxicity testing.

Furthermore, we realize that today’s further processors and bakers don’t have much time to spare. Therefore, we stock our product in five North American warehouses and will ship at a moment’s notice, 24/7 whenever necessary. We ensure the best product out there, delivered promptly to where it needs to be. To learn more about our food-grade heat transfer fluid, visit

The Paratherm NF heat transfer fluid isn’t limited to food-processing applications however. For its unique properties (low viscosity, fouling resistance, and high-temperature stability among them) it is also very widely used in applications involving processing of chemicals, plastics, packaging, and many others.  For instance, among the hundreds of running plastics applications using Paratherm NF heat transfer fluid, 64% are injection molding, and the rest are distributed among other plastics applications including thermoforming, extrusion, compounding, film casting, hot rolls, and lab mills.  Paratherm NF pairs extremely well with the electrically heated systems used in the plastics, die casting, and converting industries.  For more information, call +1 (610) 941-49 or email