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It can be confusing determining which hydraulic filter housing goes where, and what hydraulic filter element belongs to your different hydraulic filter housings. Hopefully this guide will help clear up any confusion with proper locations and uses of the various types of hydraulic filters.
A Suction Strainer is located in the inlet of the pump. The strainer removes contamination from the reservoir fluid before it reaches the pump and the system components. These filters should be set up with an internal bypass valve to prevent starving the pump.
- Last chance protection for pump
- Must use relatively course media and/or large housing size, to keep pressure drop low due to pump inlet conditions
- Cost is moderate
- Does not protect downstream components from pump wear
A Pressure Filter is located downstream of the pump. It is exposed to full system pressure. The filter removes contamination generated or passed by the pump. A particularly contamination sensitive component may be protected by a “point of use filter” located immediately upstream of it.
- Specific component protection
- Contributes to overall system cleanliness
- Catches wear debris from pump
- Housing is relatively expensive because it must handle full system pressure
- Does not catch wear debris from downstream working components
A Return Line Filter is located downstream of the pump and system components and upstream of the system reservoir. The return filter removes contamination generated or ingested by the pump and components, before the fluid returns to the reservoir.
- Catches wear debris from components before it enters the reservoir
- Lower pressure ratings result in lower cost
- May be in-line or in-tank for easier installations
- No protection from pump generated contamination
- Return line flow surges may reduce filter performance
- No direct component protection
An Off-Line Filter is located in a separate loop connected to the reservoir and has its own source of power. The Off-Line Filter operates independently of the main hydraulic system cleaning the fluid in the reservoir only.
A very popular series of part numbers for us is a Stoddard F8 followed by a three number suffix. These Stoddard F8 filter elements are cartridge type air filters with paper filtration media. The OEM version by Stoddard and our version are both designed to remove 99% of 1 micron particles and larger. They are [...]
Ingersoll-Rand and Gardner Denver have announced plans to merge into a giant air compressor powerhouse. Both manufacturers are leaders in the air compressor and filtration industry. This merger creates a dominant industrial force with 2019E pro forma revenue of $6.6 billion and a large aftermarket revenue source. Ingersoll Rand and Gardner Denver will be combined into [...]
While the vast majority of the filter elements we supply are used in manufacturing plants, we have a surprising number of dentists as customers. Yes, we also supply a lot of filter elements for dental offices. You know the small air gun that dentists use to dry your mouth? That air comes from an air [...]
Allison Transmissions are historically known around the world for their superior performance and longevity. To keep your Allison Transmission in top shape, routine maintenance of the filter elements, gaskets and seals is very important. Filter Element Store offers high quality replacement filter kits for the Allison 3000 & 4000 Series Transmissions. Each industrial grade filter kit [...]
Coalescer filters have historically been specified by micron rating and percentage of retention. If you're not familiar with Filtration Grades for coalescing filters, here is an easy guide:GRADE 4Grade 4 coalescing filter elements are typically 0.01 micron with 99.99% efficiency. They are highly efficient coalescer filters used for elevated pressures or lighter weight gases. This [...]
Some of the most commonly used hydraulic fluids include mineral oil based fluids, with additives, as well as water and synthetic fire resistant fluids. It is important to know what type of hydraulic fluid you are using when specifying a hydraulic filter element. Mineral OilHL: Oil with no active additives HL: Oil with additives to protect against corrosion [...]
Parker Filtration has slowly been purchasing major filter manufacturers and taking over the industrial filtration market. Popular brands such as Balston Filters are now owned by Parker, and a Balston 100-12-BX part number may now be referred to as a Parker 100-12-BX. We still refer to them as Balston filters.In 2016, Parker Hannifin paid 4.3 billion [...]
We offer thousands of different hydraulic filter elements for hundreds of different filter manufacturers. Our filter replacements utilize a wide range of top quality filtering media such as:MicroGlassA synthetic material made from inorganic glass fiber providing extremely consistent and defined performance for critical applications.Referred to as "Absolute", with verifiable efficiency ratings up to a Beta [...]
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