Preventive Maintenance of Air Compresssor

To minimize your air compressor down time, improve the air compressor reliability, you will need to provide your air compressor with regular maintenance. Air compressors require regular service and care in order to remain in good working condition.

From changing your air compressor oil to performing routine inspections, there are many steps that you can take to prevent a serious repair issue down the line. Remember, to schedule regular maintenance with a reliable service partner like Asia Pacific Centric, or be “scheduled” by your air compressors!

Here is an overview of some handy preventative maintenance tips for air compressors.


Daily Inspections

Before you use your air compressor , it is a great idea to perform a thorough inspection of all of its major components. For example, you should check to make sure that the tubes and pipes are clear and free of kinks or damage. In addition, you should check the oil level, monitor air temperature, working pressure, and condensate drain. Do contact us if you need a daily inspections checklist.


Air Filter

Air compressor is like a big vacuum cleaner in our house. It will suck what things present in the air. Thus, the air filter of the air compressor is to prevent dirt, dust and other particles to go into the airend. With a proper routine to replace the air filter, it will minimize the damage to air compressor internal systems. It is always recommended to change the air filter according to your manufacturer’s manual or at least 2 to 3 times a years as our region is very humid.

Your air compressor has to work harder to intake the air if the intake filter element is heavily contaminated. Its compression capacity is affected adversely and you will get less air delivered per kW. Ensure that the intake filter of your compressor is replaced regularly, more so if you’re operating it in a dirty or dusty environment.


Air Compressor Oil ( Coolant)

Air compressor oil plays an important role in how the air compressor works. It acts as a lubricant and a cooling agent that prevents your air compressor to overheat easily and prevent its parts from wear and tear. Follow the instructions stipulated in your instruction manual on the frequency of changing compressor oil and the type of oil that you should use. The most common type is synthetic oil where the life span is longer. Use the quality oil to protect your mechanical parts of the air compressor.


Cooler / Heat Exchange of Air Compressor

The cooler / heat exchanger work to reduce the operating temperature of the air compressor. By keeping the operating temperatures down, the compressors are able to function at their optimum. However, if the heat exchangers are dirty, they won’t be able to do their job well, thus hindering the compressor’s performance and reducing its life span.


Condensate Drain

After each time that you operate your air compressor, you should be sure to drain its tank. As an air compressor is used, condensation will begin to build up in its air tank. If this condensation is not drained at the end of each workday, this watery buildup can cause significant damage and wear to your compressor’s components. If you live in a humid area, it is especially important to routinely drain condensation from your compressor.

The receiver/tank will accumulate moisture from the air being compressed, more so if you’re operating it a humid environment. More condensate inside the receiver means less storage capacity.

Install an automatic no-loss drain, this will ensure this is never overlooked.


Asia Pacific Centric aims to ensure that our customers always get the optimum performance from their air compressor. We have different types of maintenance plans that can improve your air compressor reliability, thus, reducing your repair cost. If you have any further queries regarding air compressor maintenance don’t hesitate to contact us for no obligation discussion.

What is Piston Air Compressors?

Piston or reciprocating (oil lubricated) air compressors are single-acting, air-cooled air compressors. These piston air compressors are furnished as compact, self-contained, air receiver tank mounted units that are automatically regulated and driven by an electric motor or diesel engine. An air-cooled aftercooler, low oil level shutdown switch and automatic drain valve are among the optional accessories that can be provided.

These piston air compressors may be used for a variety of compressed air application. Application of these air compressors as either a primary or supplementary source of air is virtually unlimited in industrial plants, service stations and auto repair shops. Supplementary service includes such uses as furnishing air at pressure not carried in regular shop lines, air at isolated locations, and standby service for air when larger air compressors are shut down.

Basic Operation

The basic principle of operation is as follows On the suction stroke of the first-stage piston(s), air at atmospheric pressure enters the cylinders through the inlet filter(s) and then the inlet valves located in the head. On the compression stroke of the first-stage piston(s), the air is compressed to an intermediate pressure and discharged through the discharge valves(s) into common manifold(s). From the manifold(s) the air passed through the intercooler tubes, where the heat of first-stage compression is removed.

On the suction stroke of the second-stage piston this cooled air enters the second-stage cylinder through the inlet valve. The compression stroke of the second-stage piston compresses the air to the final discharge pressure and forces it out through the discharge valve into the receiver tank or system. If cooling of the discharge air is required, an air-cooled aftercooler should be installed between the air compressor discharge and the receiver tank or system.

Installation Location

For most electric motor units, select a relatively clean and dry well-lighted indoor area with plenty of space for proper ventilation, cooling airflow and accessibility. Provide 1,000 cubic feet of fresh air per 5 horsepower. Locate the unit at least 50 cm from walls, and make sure the main power supply is clearly identified and accessible.

Unless the electrical components of the unit are specially protected for outdoor use, do not install an electric motor unit outdoors or in an area that will expose the electrical components to rain, snow or sources of appreciable moisture.


In frequently humid areas, moisture may form in the pump and produce sludge in the lubricant, causing running parts to wear out prematurely. Excessive moisture is especially likely to occur if the unit is located in an unheated area that is subject to large temperature changes.

Two signs of excessive humidity are external condensation on the pump when it cools down and a “milky” appearance in petroleum lubricant.

You may be able to prevent moisture from forming in the pump by increasing ventilation, operating for longer intervals or installing an external crankcase heater kit.


Consult local officials for information regarding acceptable noise levels in your area. To reduce excessive noise, use vibration isolator pads or intake silencers, relocate the unit or construct total enclosures or baffle walls.

Note: Condensate

All compressed air systems generate condensate which accumulates in any drain point (e.g. tanks,filters, drip legs, aftercoolers, dryers). This condensate contains lubricating oil and/or substances which may be regulated and must be disposed of in accordance with local, state, and federal laws and regulations.