Evans Cooling Systems, Inc., manufacturers of non-aqueous (waterless) coolants for liquid-cooled engines, is introducing a brand new coolant, NPG+, at TMC’s Annual Meeting and Transportation Equipment Exhibition.

Evans will also announce at TMC a new partnership with TACOM (Tank Automotive Command) and the Department of the Army to expand the use of waterless coolant into the public sector.

Evans has signed a cooperative Research and development agreement with TACOM. The U.S Department of Energy (DOE) will perform a major part of the field demonstrations and testing in this program.

Evans reports NPG+ coolant offers improvements in heat transfer and viscosity that make the new fluid a “pour-in,” not requiring changes to cooling system components. Conversion from the use of conventional coolants to take advantage of the benefits of non-aqueous engine cooling is now simple to accomplish.

NPG+ waterless coolant virtually eliminates overheating in gasoline or diesel engines - the waterless coolant allows engines to tolerate running hotter, without boiling over, and allows the cooling system to run at very low pressure.

Evans said NPG+ retains all of the benefits of Evans original NPG coolant, while improving upon its thermal conductivity by about 32 percent and reducing its viscosity by about 65 percent.

NPG, is propylene glycol with proprietary additives. The benefits of NPG have been proven in thousands of applications.

Of particular interest to users of heavy-duty diesels, the Evans waterless coolants avoid pump and cylinder liner cavitation erosion, again because of the large separation between operating temperature and coolant boiling point.

The additives in NPG are stable and remain in solution for the life of the coolant - at least 500,000 miles and no SCAs (supplementary coolant additives) are necessary. There is almost no electrical conductivity and this damage to metals, hoses, and gaskets by electrolysis is avoided, according to Evans.

Evans said NPG+ works well with liquid-to-liquid oil coolers and radiators. Engines running with NPG+ can be operated at higher coolant temperatures while control of metal temperatures is maintained. This permits higher fan control temperatures and less fuel-robbing parasitic drag.