Providing Precision Lubricants and Lubrication Solutions


Compressor Oil: RPL-ACO Series

Series Range:

RPL-ACO10 - Rotary / Vane
• RPL-ACO20 - Rotary / Vane
• RPL-ACO30 - Rotary / Vane / Reciprocating

Product Description:

The RPL-ACO series of compressor oils is a semi-synthetic oil formulated using highly refined, hydro-treated paraffin base oils and synthetic PAO fluids providing excellent overall performance and a high viscosity index that will allow it to out-perform traditional compressor oils. The product is designed for use in rotary screw and rotary vane type compressors.

Rotary screw and rotary vane compressors are lubricated by injecting oil directly into the compression chamber where it is subjected to high temperatures to lubricate moving parts, to provide sealing and to absorb the heat of compression.

Horizontal and vertical reciprocating compressors operate at high-pressure ratios and elevated discharge temperatures. Therefore, it is important that the oil lubricates the crankcase bearings and components, reduces friction in the compressor cylinder, lubricates the inlet and outlet valves, and assists the sealing of the piston rings, valves and packing in the cylinder while resisting the effects of elevated temperatures and pressures.

In addition, high temperatures will cause oxidation of the lubricating oil leading to the formation of hard carbon deposits in the valve area. Discharge valve deposits also occur as a result of contaminates in the intake air due to poor filtration. They can reduce compressor efficiency through leakage or restrictions, create elevated temperatures through recompression and cause a flash or fire hazard.

The RPL-ACO Series is uniquely formulated to meet these demanding requirements. In the case of RPL-ACO30, it can also be used in either rotary or reciprocating type compressors.

Features and Benefits:

• High film strength, low volatility, reduced oil consumption

• Protection against oil oxidation at high discharge temperatures reduces sludge and varnish deposits on valves and other working parts

• Compressor efficiency is improved through cleaner separators, valves and filters

• Excellent anti-wear properties and water tolerance

• Non-foaming, • Excellent rust and corrosion protection

• Separates readily from water

• High flash point above 450F (230C) which reduces recompression and fire hazard risks

• Extends drain intervals

• Improves sealing for better compression.

• Equipment runs cooler with less energy demands.

Typical Operating Properties:

ISO Grade 32 46 68 --
Colour Amber Amber Amber --
32.6 cSt 44.8 cSt 64.6 cSt ASTM D445
5.6 cSt 6.9 cSt 8.8 cSt ASTM D445
Viscosity Index 120 120 120 ASTM D2270
Flash Point 221C
Pour Point -31C
Rust Test Pass Pass Pass ASTM D665
Copper Corrosion
Pass Pass Pass ASTM D130
4-Ball EP Test 250 kg 250 kg 250 kg ASTM D2783
4-Ball Wear Test 0.40 mm 0.40 mm 0.40 mm ASTM D2266
Foam Characteristics 0 / 0 / 0 0 / 0 / 0 0 / 0 / 0 ASTM D892
Auto-Ignition Point >260C
Operating Temperature Range Low -20C / -5F -20C / -5F -20C /-5F --
High 179C /300F 179C / 300F 179C / 300F --

* Please note: The information, data and tables contained in this website have been carefully edited at the time of publication. However, no responsibility for possible errors or omissions can be assumed. We recommend contacting our Application Support Staff to discuss your specific requirements. We are constantly updating our products therefore technical data and specifications may change at any time without notice. 08/2017

Method of Application:

No special precautions are required. Follow regular maintenance instructions as provided with original equipment. Although the RPL-ACO Series compressor oils are compatible with conventional compressor oils, it is recommended to thoroughly drain and clean systems prior to switching over. Once switched, the RPL-ACO Series typically extends lube intervals up to at least 3 times conventional lubricants and often more. It is recommended that oil drain intervals be established by monitoring the oil condition with lubricant analysis to be certain. Lubricant requirements vary with the type of compressor and may be further influenced by operating pressures, temperatures and other factors.

Also consider that it is important to prevent excess oil feed since it can be a contributing factor in the development of carbon deposits especially on discharge valves, impairing function and leading to excessively high discharge temperatures.

Available Container Sizes:

Size Metric US Imperial
Gallon 3.79 L / 3.4 kg 1gal / 7.5 lbs
Pail 18.93 L / 16 kg 5 gal / 35 lbs
Keg 56.78 L / 54 kg 15 gal / 120 lbs
Drum 208.20 L / 181 kg 55 gal / 400 lbs
* NB: Sizes and weights are approximate.



Did you know?

Residue build-up is a  leading causes of premature wear, increased energy consumption and early component failure.

A properly selected compressor lubricant will help your equipment run smoother, quieter and for longer.


Material Safety
Data Sheets

RPL-ACO Series




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Davley Darmex Precision Lubricants, 2011