--- title: Donaldson Hy-Pro Lube & Hydraulic Filtration Industry Blog | total systems cleanliness description: total systems cleanliness | Learn about hydraulic fluid, lube oil, diesel fuel and industrial fluid contamination, filtration and conditioning on the Donaldson Hy-Pro blog. --- [![Donaldson Hy-Pro Logo_White](https://www.hyprofiltration.com/hs-fs/hubfs/Hy-Pro%20Logos/Donaldson%20Hy-Pro%20Logo_White.png?width=591&height=265&name=Donaldson%20Hy-Pro%20Logo_White.png) ![Donaldson Hy-Pro Logo 2](https://www.hyprofiltration.com/hs-fs/hubfs/Hy-Pro%20Logos/Donaldson%20Hy-Pro%20Logo%202.png?width=584&height=262&name=Donaldson%20Hy-Pro%20Logo%202.png) ](https://www.hyprofiltration.com) [**](https://www.hyprofiltration.com/blog/topic/total-systems-cleanliness#tmpmodule_1568675152246189) [![Distributors](https://no-cache.hubspot.com/cta/default/170326/6a993b6f-f737-4a22-8a35-a45c4da5c3b4.png)](https://cta-redirect.hubspot.com/cta/redirect/170326/6a993b6f-f737-4a22-8a35-a45c4da5c3b4) ![ECATALOG](https://no-cache.hubspot.com/cta/default/170326/interactive-162302555948.png) ** ###### 5 min read ### [Dynamic Filter Efficiency](https://www.hyprofiltration.com/blog/dynamic-filter-efficiency) By [Hy-Pro Marketing](https://www.hyprofiltration.com/blog/author/hy-pro-marketing) on Thu, Mar. 18, 2021 # Dynamic Filter Efficiency ## What is Dynamic Filter Efficiency? ### Dynamic Filter Efficiency matches filter testing with real-life conditions.  All hydraulic and lube systems have a critical contamination tolerance level that is often defined by, but not limited to, the most sensitive system component such as servo valves or high speed journal bearings. Defining the ISO fluid cleanliness code upper limit is a function of component sensitivity, safety, system criticality and ultimately getting the most our of hydraulic and lube assets.  ###### Topics: [varnish in hydraulic oil](https://www.hyprofiltration.com/blog/topic/varnish-in-hydraulic-oil) [vacuum dehydration](https://www.hyprofiltration.com/blog/topic/vacuum-dehydration) [mining](https://www.hyprofiltration.com/blog/topic/mining) [fluid samples](https://www.hyprofiltration.com/blog/topic/fluid-samples) [total systems cleanliness](https://www.hyprofiltration.com/blog/topic/total-systems-cleanliness) [metal analysis](https://www.hyprofiltration.com/blog/topic/metal-analysis) [coalesce technology](https://www.hyprofiltration.com/blog/topic/coalesce-technology) [cleanliness](https://www.hyprofiltration.com/blog/topic/cleanliness) [COD](https://www.hyprofiltration.com/blog/topic/cod) [lube oil](https://www.hyprofiltration.com/blog/topic/lube-oil) [turbine oil](https://www.hyprofiltration.com/blog/topic/turbine-oil) [glass media](https://www.hyprofiltration.com/blog/topic/glass-media) [demulsibility](https://www.hyprofiltration.com/blog/topic/demulsibility) [servo valves](https://www.hyprofiltration.com/blog/topic/servo-valves) ###### 1 min read ### [Bearing and Component Life Extension](https://www.hyprofiltration.com/blog/bearing-component-life-extension) By [Hy-Pro Marketing](https://www.hyprofiltration.com/blog/author/hy-pro-marketing) on Thu, Mar. 04, 2021 # Extending Bearing and Component Life and Saving Money  Improving fluid cleanliness means reduced downtime, more reliable equipment, longer fluid life, and fewer maintenance hours. In addition, it also means reduced component replacement and repair expenses.  ###### Topics: [EHC](https://www.hyprofiltration.com/blog/topic/ehc) [hydraulic filters](https://www.hyprofiltration.com/blog/topic/hydraulic-filters) [Gearbox filtration](https://www.hyprofiltration.com/blog/topic/gearbox-filtration) [vacuum dehydration](https://www.hyprofiltration.com/blog/topic/vacuum-dehydration) [filter housing sizing](https://www.hyprofiltration.com/blog/topic/filter-housing-sizing) [oil darkening](https://www.hyprofiltration.com/blog/topic/oil-darkening) [mining](https://www.hyprofiltration.com/blog/topic/mining) [fluid samples](https://www.hyprofiltration.com/blog/topic/fluid-samples) [filtration](https://www.hyprofiltration.com/blog/topic/filtration) [Fluid Analysis](https://www.hyprofiltration.com/blog/topic/fluid-analysis) [total systems cleanliness](https://www.hyprofiltration.com/blog/topic/total-systems-cleanliness) [metal analysis](https://www.hyprofiltration.com/blog/topic/metal-analysis) [fluid transfer](https://www.hyprofiltration.com/blog/topic/fluid-transfer) [fluid analysis guide](https://www.hyprofiltration.com/blog/topic/fluid-analysis-guide) [coalesce technology](https://www.hyprofiltration.com/blog/topic/coalesce-technology) [filter cart](https://www.hyprofiltration.com/blog/topic/filter-cart) [gearbox](https://www.hyprofiltration.com/blog/topic/gearbox) [indianapolis](https://www.hyprofiltration.com/blog/topic/indianapolis) [lube oil](https://www.hyprofiltration.com/blog/topic/lube-oil) [turbine oil](https://www.hyprofiltration.com/blog/topic/turbine-oil) [demulsibility](https://www.hyprofiltration.com/blog/topic/demulsibility) ###### 3 min read ### [Understanding ISO Codes](https://www.hyprofiltration.com/blog/understanding-iso-codes) By [Hy-Pro Marketing](https://www.hyprofiltration.com/blog/author/hy-pro-marketing) on Thu, Feb. 25, 2021 # ISO Cleanliness Codes Explained The ISO Cleanliness Code (per ISO4406-1999) is used to quantify particulate contamination levels per milliliter of fluid at 3 sizes - 4µ, 6µ, and 14µ. It is expressed in 3 numbers (example 19/17/14) where each number represents a contaminant level code for the correlating particle size. The code includes all particles of the specified size and larger. For a detailed breakdown and a handy ISO code cheat sheet, see our [ISO Code Guide & Cheat Sheet](https://www.hyprofiltration.com/blog/iso-4406-cleanliness-codes)![Example of an ISO cleanliness code showing particle counts in hydraulic fluid at 4, 6, and 14 micron sizes.](https://www.hyprofiltration.com/hs-fs/hubfs/Screen%20Shot%202021-02-23%20at%202.50.37%20PM.png?width=283&name=Screen%20Shot%202021-02-23%20at%202.50.37%20PM.png)It is important to note that each time a code increases, the quantity range of particles is doubling. Inversely, as a code decreases by one the contaminant level is cut in half.  ###### Topics: [hydraulic fluid](https://www.hyprofiltration.com/blog/topic/hydraulic-fluid) [dirt](https://www.hyprofiltration.com/blog/topic/dirt) [hydraulic filters](https://www.hyprofiltration.com/blog/topic/hydraulic-filters) [Gearbox filtration](https://www.hyprofiltration.com/blog/topic/gearbox-filtration) [vacuum dehydration](https://www.hyprofiltration.com/blog/topic/vacuum-dehydration) [filter housing sizing](https://www.hyprofiltration.com/blog/topic/filter-housing-sizing) [plastic injection molding manufacturer](https://www.hyprofiltration.com/blog/topic/plastic-injection-molding-manufacturer) [oil darkening](https://www.hyprofiltration.com/blog/topic/oil-darkening) [mining](https://www.hyprofiltration.com/blog/topic/mining) [fluid samples](https://www.hyprofiltration.com/blog/topic/fluid-samples) [total systems cleanliness](https://www.hyprofiltration.com/blog/topic/total-systems-cleanliness) [metal analysis](https://www.hyprofiltration.com/blog/topic/metal-analysis) [filter performance](https://www.hyprofiltration.com/blog/topic/filter-performance) [paper mill](https://www.hyprofiltration.com/blog/topic/paper-mill) [fluid transfer](https://www.hyprofiltration.com/blog/topic/fluid-transfer) [filters](https://www.hyprofiltration.com/blog/topic/filters) [hydraulic valve](https://www.hyprofiltration.com/blog/topic/hydraulic-valve) [coalesce technology](https://www.hyprofiltration.com/blog/topic/coalesce-technology) [filter cart](https://www.hyprofiltration.com/blog/topic/filter-cart) [cleanliness](https://www.hyprofiltration.com/blog/topic/cleanliness) [COD](https://www.hyprofiltration.com/blog/topic/cod) [hydraulic oil](https://www.hyprofiltration.com/blog/topic/hydraulic-oil) [gearbox](https://www.hyprofiltration.com/blog/topic/gearbox) [duplex high-pressure](https://www.hyprofiltration.com/blog/topic/duplex-high-pressure) [compressor](https://www.hyprofiltration.com/blog/topic/compressor) [filter elements](https://www.hyprofiltration.com/blog/topic/filter-elements) [lube oil](https://www.hyprofiltration.com/blog/topic/lube-oil) [turbine oil](https://www.hyprofiltration.com/blog/topic/turbine-oil) [desiccant](https://www.hyprofiltration.com/blog/topic/desiccant) [demulsibility](https://www.hyprofiltration.com/blog/topic/demulsibility) ###### 3 min read ### [Breathers: An Essential Part of Total System Cleanliness](https://www.hyprofiltration.com/blog/starting-the-process-of-total-system-cleanliness-breathers) By [Hy-Pro Marketing](https://www.hyprofiltration.com/blog/author/hy-pro-marketing) on Wed, Feb. 21, 2018 [![](https://www.hyprofiltration.com/hubfs/Hy-Dry_BigGroup_111715.jpg) ](https://www.hyprofiltration.com/blog/starting-the-process-of-total-system-cleanliness-breathers) Controlling the contaminant flow of your hydraulic, lubricant or fuel reservoirs is one of the simplest goals in achieving [Total Systems Cleanliness](https://www.hyprofiltration.com/blog/bid/257662/improving-plant-reliability). ###### Topics: [contamination](https://www.hyprofiltration.com/blog/topic/contamination) [total systems cleanliness](https://www.hyprofiltration.com/blog/topic/total-systems-cleanliness) [breathers](https://www.hyprofiltration.com/blog/topic/breathers) ###### 2 min read ### [Vacuum Dehydrator VUD: Real-World Results](https://www.hyprofiltration.com/blog/bid/213938/vacuum-dehydrator-real-world-results) By [Hy-Pro Marketing](https://www.hyprofiltration.com/blog/author/hy-pro-marketing) on Mon, Sep. 10, 2012 # Hy-Pro Vacuum Dehydrators Improve Mill Reliability  We Hy-Pro Vacuum Dehydrators already know that [maintaining low levels of water in rolling mill lubricating oil](https://info.hyprofiltration.com/blog/bid/213933/Oil-Vacuum-Dehydrators-Water-in-Rolling-Mill-Lubricating-Oil) can help improve uptime, extend oil life, prevent bearing failures and increase profitability. But, what about an actual example of how a **vacuum dehydrator has improved mill reliability**? ###### Topics: [vacuum dehydrator](https://www.hyprofiltration.com/blog/topic/vacuum-dehydrator) [total systems cleanliness](https://www.hyprofiltration.com/blog/topic/total-systems-cleanliness) [All posts](https://www.hyprofiltration.com/blog/all) ### Featured ### Sign up for updates ## Have a Question for Donaldson Hy-Pro? 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