Shell Corena S4 P 100
Shell Corena S4 P 100 is an advanced synthetic air compressor lubricant developed specifically for high-pressure reciprocating (piston) compressors operating under severe conditions. Formulated using high-performance synthetic ester base fluids combined with an advanced additive system, the oil provides exceptional thermal stability, excellent wear protection and long service life in demanding industrial compressor environments.
A key advantage of Shell Corena S4 P 100 is its ability to perform reliably under extremely high operating temperatures and pressures. The lubricant is designed for compressors operating with air discharge temperatures exceeding 220°C and under continuous high delivery pressures. Its synthetic ester base fluid technology offers superior resistance to thermal degradation and oxidation compared with conventional mineral compressor oils.
The formulation also delivers outstanding deposit control, helping to prevent the formation of carbon deposits and lacquer on valves and piston crowns. These deposits can significantly reduce compressor efficiency and increase maintenance requirements if not properly controlled. By maintaining cleaner internal compressor surfaces, Shell Corena S4 P 100 supports efficient compressor operation and extended equipment life.
Shell Corena S4 P 100 also helps extend maintenance intervals. In many reciprocating compressor applications it can extend typical valve maintenance periods from around 1,000 operating hours with conventional mineral oils to between 2,000 and 4,000 hours, depending on operating conditions. This helps reduce maintenance costs and minimise downtime.
The lubricant provides excellent protection against wear and corrosion, safeguarding critical compressor components such as bearings and gears. In addition, its strong water separation properties help prevent accelerated corrosion and allow condensate to be easily drained from compressor systems. The oil also contributes to improved air line safety by reducing the formation of carbonaceous deposits that could otherwise react with rust particles and compressed air heat to create fire or explosion risks in discharge lines.
Shell Corena S4 P 100 is recommended for industrial reciprocating air compressors operating under severe conditions, particularly where air discharge temperatures exceed 220°C. It can also be used in breathing air compressors where appropriate clean-up systems are installed to ensure breathable air quality. In addition, it is suitable for certain oil mist lubrication systems operating under demanding conditions.
Typical physical characteristics include ISO viscosity grade 100, kinematic viscosity of 100 mm²/s at 40°C and 10.2 mm²/s at 100°C, density of 988 kg/m³ at 15°C and flash point of 260°C. The oil has a very low sulphated ash content of less than 0.02%, pour point of –39°C and excellent corrosion protection performance, passing ASTM D665A rust prevention testing. Water separability at 82°C is 25 minutes.
Shell Corena S4 P 100 meets DIN 51506 VDL severe duty compressor oil specification, ISO 6743-3 L-DAB classification and EN 12021 requirements.
