Compressor oil filter

Types of compressor oil filters

Air compressors are integral components in multiple industrial applications, with the addition of a compressor oil filter being paramount to ensuring the machine runs smoothly. Several different types of filters exist, each with its own operating style, advantages, and purpose.

• Disc filters

  Disc filters are typically used for water filtering and are manufactured either in radial or inline configurations. These filters hold the discs in a manner that permits filtration in the radial directions from the centre to the external circumference or in parallel flow paths along the filter's length. The tank or vessel configuration holds the discs, and the fluid moves from the open area of the disc through the filter medium and out.

• Spin-on filters

  A spin-on oil filter is an engine component that removes contaminants from the engine's oil supply. However, this type of filter can also be used in an air compressor. It comprises a filter element that is enclosed in a metal canister, which is then mounted to the oil filter adapter, or engine block threaded holes, using a clockwise motion. Once properly mounted, the used oil will then flow through the filter and into the engine or item in need of the oil. Its method of attachment makes it easier to replace.

  Advantages: Easy to install and replace.

• Centrifugal filters

  A centrifugal oil filter performs its duty by using centrifugal force to separate the contaminants from the oil. Centrifugal filters may serve primary or secondary filtering functions, with typical applications being in large diesel engines or machines that run for long hours. Larger machines may have double filtration systems to protect the engine or object in need of oil fully. Secondary filtration systems may use paper elements, while primary ones use plastic or permanent elements.

  Advantage: It can be cleaned and reused.

• Cartridge filters

  Cartridge filters use paper pleated filters housed in specific end caps. These filters create a low-cost, compact filter option, and while they are disposable, they provide a high dirt-holding capacity. When used in an air compressor, they will filter the air before it is released into the environment or used in other tools.

  Advantage: High dirt-holding capacity.

• Coalescing filters

  Coalescing oil filters combine small oil droplets into larger ones, which then flow or drain out of the filter. They remove water from the oil by passing it through a fibrous filter element, which captures the water. Compressed air may contain water, so a coalescing filter can be used to dry it up.

  Advantage: Removes water from oil.

• Strainer filters

  While the function of strainer filters is to remove only large particles, their efficiency makes them great precursors to other filters and compression systems. Their ability to stop solid-state materials like rubber, glass, and sand protects sensitive systems from damage, thereby lowering downtime. They can be cleaned and reused many times and are usually located downstream of the pump.

Specification and Maintenance

The performance of an air compressor depends largely on the maintenance of the oil filters. The following maintenance tips for the oil filters of a compressor can help air compressors perform better:

• Regular Inspection: Check the oil filter on an air compressor frequently and inspect it for signs of damage, such as cracks, leaks, and tears. A damaged filter will have a reduced filtration capacity, posing a risk to the compressor.
• Monitor Oil Pressure: Keep an eye on the oil filter's pressure levels. If the pressure starts to drop or rise abnormally, it could indicate a problem with the filter, such as clogging or damage. Take appropriate actions immediately.
• Replace According to Schedule: Adhere to the recommended air compressor oil filter replacement schedule. The periodic replacement will ensure that the filter continues to effectively remove contaminants from the oil.
• Use Genuine Filters: Using the recommended oil filters from the manufacturer helps to maintain the compressor's performance. Aftermarket filters may not provide the same level of filtration or fit.
• Check for Bypass Valves: Bypass valves allow unfiltered oil to circulate in the compressor if the filter gets too clogged. Check the function of these valves regularly. If they malfunction, contaminated oil can damage the compressor.
• Clean Filter Housing: The housing or sump where the oil filter sits can accumulate dust and debris over time. Clean it out periodically to prevent any contaminants from entering the new filter during replacement.
• Inspect Oil Condition: Monitor the quality of oil circulating in the air compressor. If it becomes heavily contaminated, consider changing the oil instead of just replacing the filter. Clean oil prolongates the life of the compressor and its filters.

Usage scenarios of the compressor oil filter

The primary function of a compressor oil filter is to remove contaminants from the oil. This feature has numerous applications in various industries.

Air conditioning units in residential and commercial buildings use oil filters to maintain the performance of their compressors. The parcels of air circulating in an entire house come from air compressors. Refrigeration compressors in different air conditioners and refrigerators need oil to function well. Air compressors also come in handy in pneumatic tools such closet compressors. Besides ensuring proper functioning, they enhance the longevity of the tools.

Industries use large-scale refrigeration compressors to preserve products in freezers and refrigerators. A prevalent example is the food industry, where faulty refrigeration systems can lead to massive losses. The compressors in these industrial refrigerators can use oil filters to function efficiently, preventing any interruption in service.

The automotive industry also heavily relies on compressor oil filters. Car owners and manufacturers replace car compressor filters to protect the vehicle's air and refrigeration system. A clean filter produces clean air for the occupants of the car. It also ensures the longevity of the air tool.

Construction industries that require large amounts of refrigerants and compressed air install large-scale compressors. They need to be efficient to ensure working expenses are as minimal as possible. Use of a compressor oil filter can come in handy to ensure the compressor works optimally.

Buyers can get different types, shapes, and sizes of compressor oil filters from suppliers on Alibaba.com.

How to choose a compressor oil filter

Apart from bearing quality manufacturers in mind, there are a few more things to consider when buying an air compressor oil filter. This includes getting the correct size and making sure it's compatible with the compressor model.

Using the existing filter as a guide, determine its dimensions. The length, outside diameter, and thread diameter need to match in order for the new filter to fit. Refer to the owner’s manual to ensure the new filter is compatible with the air compressor. If it's not, it can cause the unit to malfunction or be damaged.

Look at the filter media, which can be pleated paper, synthetic blend, or 100% synthetic. All three options can filter oil in different ways. Paper filters have specific pleats and are only suitable for some air compressors. A synthetic oil filter will do a much better job of trapping dirt and debris and allow a higher volume of oil to pass through its media. This is because its media is manufactured with fibrous materials that create tight spaces that are used to catch impurities.

Consider any additional features the replacement filter may have. These could include anti-drain back valves, bypass valves, or integrated seal rings. A one-way valve prevents oil from draining out of the filter when the compressor is switched off. It ensures oil is present immediately upon starting the machine so that internal parts are lubricated. A bypass valve will allow oil to flow through it if the filter is clogged. It ensures the air compressor works optimally. Some filters have an integrated seal ring ensuring there are no gaps or spaces between the filter and compressor. This will eliminate the risk of leaks and contamination.

Check if the filter is a full-flow or dual-filter system. A full-flow filter will allow oil to flow through it, and it is generally smaller than the dual filters. A dual filter uses a full-flow filter and a bypass filter and is ideal for compressors that run continuously for long periods. The dual filtering system ensures only the smallest dirt particles can get through to the compressor. This provides a higher level of protection.

Q&A

Q: What happens if someone doesn't use compressor oil in the machine?

A: The air that circulates in the environment will get hot because there is no cool space to circulate the heat. Also, the moving parts will rub against each other, causing friction that may lead to breakdown.

Q: What happens when someone skips the compressor oil filter?

A: Skipping the oil filter may allow dirt to contaminate the oil, which may damage the machine's components.

Q: How often should the compressor oil filter be replaced?

A: It is recommended to change the oil filter after 1,000 to 2,000 hours of operation.

Q: Can a dirty oil filter affect the performance of a gas compressor?

A: Yes, an unclean oil filter can restrict the flow of oil, leading to compressor overheating, excessive wear, and ultimately, failure.