Return Filter – RYCO Hydraulics
System Cleanliness – Ratings & Filtration

In order to monitor and quantify the cleanliness of the fluid in an hydraulic system, standard rating systems have been developed over the years. These cleanliness ratings also allow us to measure the effectiveness of any filtration systems put in place to maintain the cleanliness of an hydraulic system. Cleanliness Rating Systems The cleanliness of a fluid can be measuring using a number of different standard classification systems, as outlined below. ISO 4406 ISO 4406 describes a method by which to count and record particle sizes. An average is taken by counting three size ranges. Particles greater than 4 microns. Particles greater than 6 microns. Particles greater than 14 microns. Because the number of particles within a system may be very high, the actual number is not used. Instead, a number is used to represent the value. This "class" number is based on the following table. The table below is the ISO 4406 codes. There has been two major editions of this standard, 1987 and 1999. 1999 is the current edition, and it should be used when possible. ISO 4406: ...

RYCO Filters 101

Filters are complementary to RYCO’s product offering and we have a wide range of filters and filtration accessories including inline spin-on, heavy duty inline, tank top, suction strainers, diffusers, air breather, filler cap/strainer, push-on filler as well as level and temperature gauges. What is filtration? The process by which solid particles are separated from a fluid by passing the fluid through a permeable material that will not let the solid particles through. Filtration is needed to remove contamination from a hydraulic system. Contamination increases wear on hydraulic components and can lead to increased breakdowns. How do filters work? Filters work by passing hydraulic fluid through filter media, trapping particles of contamination allowing clean oil to flow through to the outlet. Where are filters used in hydraulic systems? Filters are used in four common areas of hydraulic systems: Inline Filter Return Filter Suction Filter Tank Filler/Breather What are the types of filters? There are three main types of filters: spin-on filters, inline filters, tank top filters as well as suction strainers and diffusers. Spin-on Filters RYCO RIF series are all spin-on ...