Corena S 4 P

Advanced Synthetic Reciprocating (Piston) Air Compressor Oil

Shell Corena S4 P is an advanced synthetic air compressor oil incorporating synthetic ester base fluids and a unique high performance additive system. It is designed to deliver the highest performance lubrication for high pressure reciprocating compressors running in excess of 220 °C discharge temperatures at elevated pressures.

Performance Benefits

Long oil life – Maintenance saving

Shell Corena S4 P is designed to provide safe, reliable and effective lubrication for extended service periods where mineral compressor lubricants are unsatisfactory.

With an extremely low tendency for deposit build-up Shell Corena S4 P helps ensure continued high performance of the compressor over long periods and reduces maintenance costs and shutdowns.

Shell Corena S4 P can extend the normal valve maintenance period from typically up to 1000 hours of operation using conventional mineral oils, to 2000 to 4000 hours depending on operating conditions.

Outstanding wear protection

Shell Corena S4 P helps provide exceptional protection of internal metal surfaces from corrosion and wear to help prolong the life of critical parts such as bearings and gears.

Maintaining system efficiency

Shell Corena S4 P helps prevent the formation of carbon deposits and lacquer on valves and piston crowns at high working temperatures and pressures. These can cause serious damage, lower compressor efficiency and increase maintenance costs.

In addition, Shell Corena S4 P has excellent water separation to help prevent accelerated corrosion and facilitating easy draining of condensate.

Enhanced of air line safety

In discharge air lines, the combination of rust particles, dispersed in carbonaceous deposits, coupled with heat from recently compressed air, can cause a reaction leading to the possibility of fires and explosion. Shell Corena S4 P helps to minimise the likelihood of this danger.

Applications

Reciprocating air compressors

Shell Corena S4 P is suitable for all industrial reciprocating air compressors, in particular those operating under severe conditions of air discharge temperatures in excess of 220°C with continuous high delivery pressures.

Breathing air compressors

Shell Corena S4 P may be used in breathing air compressors, provided subsidiary clean-up apparatus is used to ensure that the air produced is fit for breathing.

Advice on applications not covered in this leaflet may be obtained from your Shell representative

Specifications and Approvals

Shell Corena S4 P meets the requirements of:

DIN 51506 VDL ISO/DP 6521-L-DAB - medium duty

ISO 6743-3:2003 DAB - Severe duty

EN 12021

Health and Safety

Guidance on Health and Safety is available on the appropriate Material Safety Data Sheet, which can be obtained from your Shell representative.

Miscibility

Shell Corena S4 P oils are fully miscible with mineral oils, although dilution with mineral lubricants will markedly reduce its performance.

Seal Compatibility

Shell Corena S4 P, in common with other ester-based lubricants, is not compatible with all seal materials, and some older compressors may need to have the seals changed before they can be run on the new grades.

Compatibility Guide

Acceptable	High nitrile content (SE85)	>36% acrylonitrile
Majority acceptable	Medium nitrile content (SE70)	30 - 36% acrylonitrile
Not recommended	Low nitrile content	Low nitrile content

Protect the Environment

Take used oil to an authorized collection point. Do not discharge into drains, soil or water.

Advice

Advice on applications not covered in this leaflet may be obtained from your Shell representative.

Typical Physical Characteristics

Shell Corena S4 P	68	100
ISO Viscosity Grade ISO 3448	68	100
Performance standard Typ DIN 51506	VDL 68	VDL 100
Kinematic viscosity ASTM D445 at 40 °C mm²/s 68 100 at 100 °C mm²/s	68 8.5	100 10.2
Density at 15 °C kg/m³ ASTM D1298	990	988
Flash point COC °C ASTM D92	250	260
Pour point °C ASTM D97	-51	-39
Sulphated ash %m DIN 51575	<0.02	<0.02
Rust prevention properties (steel) ASTM D665A (24 hr)	Pass	Pass
Copper corrosion ASTM D130 (100ºC/3hr)	1b	1b
Water separability ASTM D1401 at 54°C min at 82°C min	30 -	- 25

These characteristics are typical of current production. Whilst future production will conform to Shell's specification, variations in these characteristics may occur.