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Where Contamination Comes From

The Filter Guys

New Fluids

Adding new fluid can be a source of contamination. Even though it’s fresh from the drum, new engine oil isn’t clean. (It may look clean, but, remember, the human eye can only see a particle the size of about 40 μm.) Also, diesel fuel cleanliness varies from pump to pump. Typical fuel cleanliness levels coming out of the pump are ISO rated at 22/21/18. (ISO cleanliness code of 22/21/18 translates to a particle count of 20,000 to 40,000 per millilitre for particles of 4 μm and greater; 10,000 to 20,000 per millilitre for particles of 6 μm and greater; and 1300 to 2500 per millilitre for particles of 14 μm and greater), and water content is typically 200 to 300 ppm. Never assume your fluids are clean until it has been filtered.

 

Built-In

Built-in contamination, also called primary contamination, is caused during the manufacture, assembly and testing of the engine and its components. Metal filings, small burrs, dirt or sand and other contaminants are routinely found in initial clean up filtration of newly manufactured engines.

 

Ingressed

Ingressed or external contamination comes from the environment surrounding the engine or vehicle. Dirt can enter the engine liquid supply through crank case breathers or fuel tank breathers and vents and the air intake system. Ingressed moisture, particularly, can cause longer term problems. As a hot system cools at night, cool moisture-laden air can be drawn into the engine or fuel tank; as the air condenses, water is released into the engine or fuel tank. Water in excess of 0.5% by volume in a hydrocarbon-based fluid accelerates the formation of acids, sludge and oxidation that can attack internal components, cause rust, and adversely affect lubrication properties. The severity of ingression and type of contaminant are dictated by the applications and environment.

 

Induced

Maintenance procedures can introduce contamination into the engine. Opening the engine allows airborne particles to enter. Removing air filters, opening oil caps, fuel tank caps and removal of oil and fuel filters are all possible sources for introducing contamination to an engine. Keep your system closed as much as possible and take care to be sure everything that goes into the engine is as clean as possible. One common example is very often funnels are used fill the engine with oil. The oily funnel will collect dirt between uses. The funnel should be properly cleaned before using it to fill the engine with oil.

 

In-Operation

The major sources of contamination in the engine are the combustion by-products (soot) and oxidation of the fluids in the engine due to the thermal stressing. Wear-generated contaminants are a hazard during engine operation.

 

 

 

The circuit actually generates additional particles as the fluid comes into contact with the precision machined surfaces of cylinder walls and pistons, injector needles and pistons and crankshaft bearings. Contaminant levels can keep doubling with every new particle generated. The result can be catastrophic if these contaminants are not properly filtered out of the system.

 

Rubber & Elastomers

Due to temperature, time, and high-velocity fluid streams, rubber compounds and elastomers degrade—thus releasing particulates into the fluid.

 

Biodiesel

Biodiesel can support biological growth and generate organic contamination and microbes.

 

Donaldson Filtration

What we need to spec up your hydraulic filter requirements.

The Filter Guys

What we need to spec up your hydraulic filter requirements.

When looking to identify a filter housing for your specific problem we need to know a little bit about what you are trying to achieve and where in your hydraulic circuit you need to fit it. To do this we require a few key pieces of information to ensure correct fit and operation for you. That being:

Port Sizes. What size pipe-work are you fitting the housing into? In many cases this is a BSP measurement.

Operating Pressure. Is the filter operating as a return line, tank top return, pressure or suction filter, or is it simply an in-tank suction strainer?

Flow rate. What is the flow of the hydraulic oil in litres per minute?

Micron. It is important to get the micron rating correct to ensure that you are protecting delicate parts of your hydraulic system further along the flow route from damaging wear particles.

With this information we can then source and supply the correct filter unit. Contact us on 01902 491118 with your hydraulic filter enquiries or contact us via our website Online Enquiry Form.

We can also offer a range of replacement filter elements and housing indicators to help keep you informed when your filters require changing.

Hydraulic Filtration Systems and accessories.

Donaldson develops, manufactures and markets a full line of hydraulic filters for the protection of machinery and components in hundreds of applications on heavy duty mobile equipment. When you need high, medium or low pressure filters, filter housings, filter heads, replacement cartridges, spin-ons or hydraulic accessories, turn to Sterling Filtration, authorised distributors of Donaldson filters. We also offer a broad line of replacement filter elements.

Donaldson heavy duty high pressure filters sit behind pumps and other prime movers to protect critical hydraulic components such as cylinders, motors and valves. All contain our Synteq ® synthetic filter media, specially developed by Donaldson for high efficiency liquid filtration. Working pressures range from 140 to 420 bar and static pressures from 310 to 830 bar.

Donaldson Duramax ®, well known as the highest rated medium pressure filters available, are most often used in return line positions. As spin-ons, they are particularly well-suited for the duplex circuits. Donaldson Synteq ® and cellulose media are available. Duramax working pressures range from 25 to 70 bar and static pressures from 55 to 140 bar.

Low pressure filters are the most commonly used type of filters in hydraulic circuits, used most often as return line filters in applications with working pressures up to 10 bar and static pressure up to 20 bar.

An expanded line of accessories for hydraulic lines and reservoirs is also available. Finish off your hydraulic circuit with filter service indicators, pressure gauges, test point assemblies, valves, flanges, reservoir level gauges, sight glasses, a variety of tank and filter breathers, caps vents, plugs, strainers, diffusers, magnets and more.

Donaldson is proud to offer a broad selection of hydraulic replacement cartridges and spin-ons to the aftermarket via its distributors. Choose from our many different filter media to find exactly the right filter to help you meet the cleanliness requirements for your hydraulic system.

We Offer Donaldson Engine and Hydraulic Aftermarket Filters to replace Baldwin Filters in the UK.

The Filter Guys

We Offer Donaldson Engine and Hydraulic Aftermarket Filters to replace Baldwin Filters in the UK.

At Sterling Filtration Ltd we offer over 3,000 Donaldson equivalent filters to replace your Baldwin filters. They cover a huge range of engine filters (main air, safety air, lubricating oil, fuel, fuel water separators) and hydraulic system filters.

Please check out our range by clicking on the Donaldson Brand Icon below.

If you have any requirements for Baldwin equivalent filters please give us a call today on 01902 491118. We are here to service your filter needs!

Filters for Compressors.

The Filter Guys

Filters for Compressors.

The range of compressors working in industry in the UK is vast and they all require engine and hydraulic filter elements. Our range of aftermarket filters covers a huge range of these applications including filters for: Atlas Copco, Becker, Compare, Demag, Gardner Denver, Holman, Hydrovane, Ingersoll Rand, Kaeser, Mattei, Sullair and many, many more.

Regular, scheduled maintenance of your engine and hydraulic circuit filters can avoid breakdowns and lengthy downtime of your machine. Holding a set of filters in stock can also reduce the amount of time that your machine is down when the lead time for replacement filters is more than a few days.

At Sterling Filtration we endeavour to hold as much stock for as many machines as possible. If you have an urgent filter requirement, a breakdown to repair or are just looking for competitively priced filters for stock please give us a call today.

Donaldson Filtration

Filters for Trucks

The Filter Guys

Filters for Trucks.

The range of trucks in the haulage and transportation sector in the UK is vast and they all require engine and hydraulic filter elements. Our range of aftermarket filters covers a huge range of these applications including filters for: Dennis Eagle, ERF, Foden, Hino, Hyundai, Isuzu, Iveco, DAF, MAN, Mercedes, Scania, Volvo and many, many more.

Regular, scheduled maintenance of your engine and hydraulic circuit filters can avoid breakdowns and lengthy downtime of your machine. Holding a set of filters in stock can also reduce the amount of time that your machine is down when the lead time for replacement filters is more than a few days.

At Sterling Filtration we endeavour to hold as much stock for as many machines as possible. If you have an urgent filter requirement, a breakdown to repair or are just looking for competitively priced filters for stock please give us a call today.

Donaldson Filtration

Heavy Duty Applications

The Filter Guys

Our aftermarket filtration range covers a huge section of heavy duty applications.

The heavy duty aftermarket in the UK is made up of many hundreds of machines and static equipment that require regular filter servicing to maintain their optimum performance. We can identify and hold large stocks of filters for machines including: Atlast Copco, Barford, Benford, Bomag, Case Poclain, Caterpillar, Doosan Daewoo, Demag, Fiat Hitachi and Kobelco, Fuchs, Hanix, Hyundai, Iveco, John Deere, Kaeser, Komatsu, Kubota, Liebherr, Lombardini, Massey Ferguson, Matbro, Mitsubishi, New Holland, Samsung, Shaeff, Sennebogen, Takeuchi, Terex, Volvo, Yanmar and many, many more.

Regular, scheduled maintenance of your engine and hydraulic circuit filters can avoid breakdowns and lengthy downtime of your machine. Holding a set of filters in stock can also reduce the amount of time that your machine is down when the lead time for replacement filters is more than a few days.

At Sterling Filtration we endeavour to hold as much stock for as many machines as possible. If you have an urgent filter requirement, a breakdown to repair or are just looking for competitively priced filters for stock please give us a call today.

Donaldson Filtration

Worried About Water in Your Air Intake System?

The Filter Guys

Worried About Water in Your Air Intake System?

Sometimes you can’t help operating equipment in extreme moisture environments especially during the spring when the weather is unpredictable, but it’s good to be mindful of a few things to help keep your air intake system running at top efficiency.

Typical Symptoms of Water Ingestion:

  • High Restriction indications.
  • Mud caked in the VacValve
  • Wet, wavy air filter media
  • System rust, corrosion and/or water damage
  • Moisture-related environmental problems such as icing

Simple Tips to Keep Water Out of Your System:

  • Check and clear the VacValve daily
  • Make sure the air cleaner cover and filter are installed properly
  • Inspect air intake system for any leaks

Remember, a water-soaked air filter will occasionally lock-up a restriction indicator. Wet filters should always be replaced as they are prone to tear at weak, wet spots on the media. This would then allow the air flow to bypass the filter allowing dirt and debris into your air intake.

A restriction indicators ‘lock-up” restriction level is generally marked on the indicator itself. To check an indicator, remove it, wipe the base clean, then apply a small amount of vacuum. If the indicator locks up, it should still be okay to reuse this way. If not be sure to replace the indicator.

Donaldson Air cleaner assemblies and accessories are available to buy from Sterling Filtration Ltd.

Donaldson Filtration

Diesel Fuel & the Cold Weather.

The Filter Guys

Diesel Fuel & the Cold Weather.

Diesel is the most commonly used fuel in heavy duty applications and requires filtering to ensure that any contaminants have been removed before they can cause stoppages, or serious damage resulting in complete failure, to the diesel system components. In-line fuel elements can stop the larger, damaging contaminants such as rust and sediment from the fuel tank entering the fuel system.

Diesel filters are important as they have to protect the fuel pump and injectors not only from abrasive particles but also from minute droplets of water often found in diesel fuel. Injectors and diesel pumps are precision machined components and are very costly to repair or replace. It is much more cost effective to change the filters at their regular service intervals rather than have to pay the cost of even one breakdown repair bill.

You also have to remember that at this time of year water in your fuel (or in any of your machines liquids) can freeze causing damage, blockages and downtime for your engine or machine so its important to maintain water separation from diesel to prevent avoidable issues when the weather is sub zero.

Sterling Filtration offers a range of replacement fuel filter elements and spin on canisters. We can also offer various fuel housings for particulate and water removal and fuel additive for maintenance of your fuel system.

Fuel Filter Maintenance – Know Your Basics.

Best practices for fuel maintenance intervals.

  • Drain water from your primary filter daily when refuelling.
  • Carry a spare set of fuel filters in case you receive a bad load of fuel.
  • Never switch to more open filters to get longer filter life – this will reduce fuel pump and injector life.
  • If using biodiesel, make certain your fuel supplier meets current fuel standards.
  • Ensure that your engine is compatible with the concentration (or percent) biodiesel you wish to use.
  • When using your own fuel tank, remember that removing contaminants before they reach the vehicle is the best. Therefore, it is best to use some type of bulk filtration or filtering funnel (also available from Sterling Filtration Ltd).

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