- Products & Solutions
- All Industries
- About Us
For clean engine oil at a reasonable cost, Donaldson engineers typically recommend using a full-flow filter with advanced Donaldson Synteq™ media technology. Our industry-leading Synteq media offers higher efficiency than standard cellulose media at the same or lower pressure drop. With this solution, you get fluid that is as clean (or cleaner) than two-stage filtration, without the added cost, maintenance and packaging space of a multi-filter system.
An added benefit of this strategy is that oil becomes cleaner faster and stays cleaner because 100 percent of the flow is continuously filtered through high-efficiency media. Cleaner oil delivers greater engine protection – without the increased restriction of traditional full-flow systems that use cellulose media. Using this strategy, the full-flow filter can often be the only filter in the system, which saves on overall first fit system costs, as well as ongoing maintenance costs for your customers.
With a full-flow filter, you’re trying to balance efficiency and restriction. You want a filter that’s more efficient, but if it’s too efficient, you end up going into filter bypass more often. This can be detrimental because unfiltered oil circulates to the engine more often. What many engineers do is take the high-efficiency filtration and put it in a flow bypass (kidney loop) outside the full-flow filter. That way it’s not restricting flow to critical engine components.
Two filters is a great solution, but a combination of a full-flow filter and a bypass filter is also a more expensive one. Two heads, plumbing and filters (rather than a single full-flow filter) require more space on the engine and increase maintenance cost.
Whether you choose to apply a full-flow filter independently or incorporate a bypass filter, we offer advanced solutions to meet the needs of all system configurations.
Maintaining appropriate pressure within the system is critical for overall function and helps maintain effective filtration performance. To make sure that components are not damaged during operation, most lube systems include a pressure regulating valve that continuously regulates pressure under all temperature and flow conditions. If the system pressure gets too high, it could rupture seals, filters or other components, potentially causing catastrophic damage. High-pressure relief valves have a similar function – serving as the backup system to the pressure regulating valve.