What Makes Polyalkylene Glycol Ideal For High Temperature Start?

How does polyalkylene glycol (PAG) perform so well in systems that starts at high temperatures? This lubricant is often chosen for such conditions due to its unique chemical and physical properties. Find here the top features of Polyalkylene Glycol that make it suitable for use in environments where high temperature starts occur.

Stability at high temperatures:

One reason PAG is preferred is its stability when exposed to heat. Many lubricants break down or lose their properties at high temperatures, but PAG maintains its viscosity and lubricating ability. This helps ensure that equipment receives effective lubrication even during hot starts, preventing wear on parts.

Low volatility:

PAG oils have low volatility, meaning they do not evaporate easily at high temperatures. This quality allows the lubricant to stay inside the system longer without thinning out or losing volume. This characteristic supports consistent lubrication and protects components from damage during high temperature operation.

Good lubricating film:

PAG forms a strong lubricating film on metal surfaces, which remains intact even when temperatures rise quickly. This film reduces friction between moving parts during the key startup phase, where wear is often highest. Maintaining this film protects the equipment and extends its life.

Compatibility with refrigerants;

Many HVAC and refrigeration systems use PAG lubricants alongside specific refrigerants such as R-134a. PAG mixes well with these refrigerants and does not separate, even when temperatures fluctuate sharply during startup. This compatibility ensures smooth system operation and reduces the risk of lubricant breakdown.

Resistance to oxidation:

Oxidation can cause oils to thicken and form deposits that reduce efficiency. PAG has good resistance to oxidation at elevated temperatures, which means it remains effective for longer periods. This quality reduces maintenance frequency and supports stable system performance during hot starts.

Moisture tolerance:

PAG lubricants handle small amounts of moisture better than some other oils. Moisture can affect lubrication by causing corrosion or reducing oil film strength. PAG’s tolerance to moisture helps maintain its protective qualities, even in conditions where water contamination is possible.

PAG performs well across a broad temperature range, from low temperatures up to high heat. This makes it a flexible choice for systems that experience temperature changes, including high temperature starts, without losing performance or causing damage.