Postby RMSTTL » June 13th, 2011, 9:41 pm
Evans NPG+ Waterless Coolant is perfectly suited for the demands of any hard-working engine. NPG+ is a blend of non-aqueous liquid chemicals. NPG+ is a "pour-in" coolant, making it easy to convert from conventional antifreeze and water mixes to Evans NPG+ Waterless Coolant. No cooling system component modifications are required for a successful conversion.
NPG+ Waterless Coolant virtually eliminates overheating in gasoline and light duty diesel engines. The waterless coolant allows engines to tolerate higher temperatures, without boiling over. Unlike conventional coolants, NPG+ has the ability to run at low or no pressure. This reduces the stress on the hoses, gaskets and other system components lowering the maintenance costs on the cooling system. Because there is
no water in the system, engines operating with NPG+ are free from electrolysis. NPG+ is safe for use with all metals and totally non-corrosive to most.
Extreme hot and cold environments are not a concern with Evans NPG+. NPG+ is used as a pure coolant - no water is added. The waterless solution boils at 375° F. NPG+ also out performs conventional coolant in freezing weather. A 50/50 mix of conventional antifreeze and water freezes around -40° F. Pure NPG+ remains liquid until -40° F, when it contracts slightly and turns into a viscous slurry. It will not
freeze solid and expand. Engines will run well no matter where or how hard they are driven.
An engine utilizing Evans NPG+ Waterless coolant is able to control the temperature of the coolant significantly below its high boiling point (375° F). This is a sharp contrast to conventional water based cooling systems that operate near the boiling point of the coolant. In conventional systems, locally generated coolant vapor often will not condense back to liquid, forming an insulating barrier between the coolant jacket metal and the liquid coolant, causing hot spots to develop. In an Evans Waterless Cooling System any locally generated vapor is immediately condensed back to liquid coolant avoiding the development of an insulating layer of vapor.
NPG+ works well with liquid-to-liquid oil coolers and radiators. It is important to remember that although the thermal conductivity of water is great, the conductivity of the water vapor is about zero. Engines running with NPG+ can be operated at a higher coolant temperature while control of the metal temperature
is maintained. This fact permits higher fan control temperatures and less fuel robbing parasitic drag.
Engines run more efficiently at higher temperatures. Conventional systems limit how hot a gasoline or diesel engine can run before serious damage occurs. Water based coolants vaporize around 225° F at sea level. These systems are pressurized to raise the boiling point to around 250° F.
Raising the coolant’s boiling point does not solve the problem occurring inside the engine’s water-jacket.
Inside the water-jacket, heat-stressed critical metal surfaces exceed the thermal capacity of water-based coolants. These coolants boil, forming a vapor barrier at the metal's surface. This vapor barrier acts as an insulator and prevents efficient heat transfer from the metal to the coolant, causing localized overheating and vaporization of coolant. Eventually, when released into the coolant, this super-heated vaporized coolant
does not condense when it returns to the radiator. It then remains a gaseous barrier preventing heat transfer in the radiator. The result with water-based coolants is continual loss of cooling efficiency as the vapor circulates through the hot engine and radiator. NPG+ bathes the entire cooling jacket and significantly improves coolant surface effectiveness.
Heat transfers more efficiently from the metal to the vaporfree liquid coolant and is carried off to the radiator for more effective heat transfer. Unique only to Evans Coolants, any vaporized NPG+ immediately condenses back to liquid while still in the engine allowing the coolant to continually remain vapor-free and absorb damaging heat on its way to the radiator. When trapped heat is eliminated from the cooling system
most non-computer regulated engines can operate at higher temperatures. Operating engines at higher temperatures increases their efficiency. NPG+ permits most engines to operate at higher temperatures without requiring any other system changes often allow an increase in power output and fuel efficiency.
NPG+ is a virtually "lifetime" coolant. The additives in NPG+ are stable and remain in the solution for the life of the coolant (at least 500,000 miles.) Conventional coolants must be flushed and changed at regular intervals to eliminate contaminants and renew effectiveness. NPG+ has almost no electrical conductivity so damage to metal, hoses, and gaskets by electrolysis is avoided. Because Evans NPG+ contains no water, corrosion, pump and cylinder liner cavitation are virtually eliminated creating major maintenance savings
on both gasoline and diesel engines.
The limit of Evans NPG+ waterless engine coolant has yet to be discovered.
