---
title: Donaldson Hy-Pro Lube & Hydraulic Filtration Industry Blog | duplex low-pressure
description: duplex low-pressure | Learn about hydraulic fluid, lube oil, diesel fuel and industrial fluid contamination, filtration and conditioning on the Donaldson Hy-Pro blog.
---

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###### 1 min read

### [Hy-Pro's Product Spotlight: Compact Offline Filter (COF)](https://www.hyprofiltration.com/blog/productspotlight-cof)

 By [Hy-Pro Marketing](https://www.hyprofiltration.com/blog/author/hy-pro-marketing) on Thu, Apr. 01, 2021

# Hy-Pro's Compact Offline Filter

Our newest and smallest unit yet, the Compact Offline Filter is able[![COF_Group-2](https://www.hyprofiltration.com/hs-fs/hubfs/COF_Group-2.jpg?width=201&name=COF_Group-2.jpg)](https://www.hyprofiltration.com/products/fluid-conditioning-equipment/offline-filter-system/cof-overview-0) to fit where no other filtration equipment can. Ideal for smaller systems or where a larger offline system wouldn't fit, this solution can be permanently installed or made portable for ease of use. 

###### Topics: [hydraulic fluid](https://www.hyprofiltration.com/blog/topic/hydraulic-fluid) [contamination](https://www.hyprofiltration.com/blog/topic/contamination) [dirt](https://www.hyprofiltration.com/blog/topic/dirt) [Water Contamination](https://www.hyprofiltration.com/blog/topic/water-contamination) [hydraulic filters](https://www.hyprofiltration.com/blog/topic/hydraulic-filters) [hydraulic and lubrication filter types](https://www.hyprofiltration.com/blog/topic/hydraulic-and-lubrication-filter-types) [Gearbox filtration](https://www.hyprofiltration.com/blog/topic/gearbox-filtration) [new oil](https://www.hyprofiltration.com/blog/topic/new-oil) [micro-dieseling](https://www.hyprofiltration.com/blog/topic/micro-dieseling) [fluid samples](https://www.hyprofiltration.com/blog/topic/fluid-samples) [filtration](https://www.hyprofiltration.com/blog/topic/filtration) [oil analysis](https://www.hyprofiltration.com/blog/topic/oil-analysis) [hydraulic pump](https://www.hyprofiltration.com/blog/topic/hydraulic-pump) [filters](https://www.hyprofiltration.com/blog/topic/filters) [hydraulic valve](https://www.hyprofiltration.com/blog/topic/hydraulic-valve) [FSL](https://www.hyprofiltration.com/blog/topic/fsl) [liquid conditioning station](https://www.hyprofiltration.com/blog/topic/liquid-conditioning-station) [duplex low-pressure](https://www.hyprofiltration.com/blog/topic/duplex-low-pressure) [oxidation](https://www.hyprofiltration.com/blog/topic/oxidation) [Noria](https://www.hyprofiltration.com/blog/topic/noria) [NSD](https://www.hyprofiltration.com/blog/topic/nsd) [hydraulic](https://www.hyprofiltration.com/blog/topic/hydraulic) [cellulose media](https://www.hyprofiltration.com/blog/topic/cellulose-media) [compressor](https://www.hyprofiltration.com/blog/topic/compressor) [Reliable Plant](https://www.hyprofiltration.com/blog/topic/reliable-plant) [filter comparison](https://www.hyprofiltration.com/blog/topic/filter-comparison) [lube oil](https://www.hyprofiltration.com/blog/topic/lube-oil) [aluminum refinery](https://www.hyprofiltration.com/blog/topic/aluminum-refinery) [conditioning](https://www.hyprofiltration.com/blog/topic/conditioning) [turbine oil](https://www.hyprofiltration.com/blog/topic/turbine-oil) [glass media](https://www.hyprofiltration.com/blog/topic/glass-media)

###### 3 min read

### [Getting to Know Demulsibility](https://www.hyprofiltration.com/blog/getting-to-know-demulsibility)

 By [Hy-Pro Marketing](https://www.hyprofiltration.com/blog/author/hy-pro-marketing) on Thu, Mar. 25, 2021

# Demulsibility

## What is Demulsibility?

Demulsibility is the ability of oil to separate from water. Oil and water naturally separate because like molecules attract each other. Oil sticks with oil, water sticks with water. Oil is "hydrophobic", or "afraid of water," which is a benefit when it comes to fluids like turbine oil. 

###### Topics: [varnish in hydraulic oil](https://www.hyprofiltration.com/blog/topic/varnish-in-hydraulic-oil) [varnish in turbine oil](https://www.hyprofiltration.com/blog/topic/varnish-in-turbine-oil) [contamination](https://www.hyprofiltration.com/blog/topic/contamination) [water in oil](https://www.hyprofiltration.com/blog/topic/water-in-oil) [dirt](https://www.hyprofiltration.com/blog/topic/dirt) [Phosphate Ester](https://www.hyprofiltration.com/blog/topic/phosphate-ester) [diesel engine](https://www.hyprofiltration.com/blog/topic/diesel-engine) [maintenance](https://www.hyprofiltration.com/blog/topic/maintenance) [steel mills](https://www.hyprofiltration.com/blog/topic/steel-mills) [vacuum dehydration](https://www.hyprofiltration.com/blog/topic/vacuum-dehydration) [rolling mill lubricating oil](https://www.hyprofiltration.com/blog/topic/rolling-mill-lubricating-oil) [filter housing sizing](https://www.hyprofiltration.com/blog/topic/filter-housing-sizing) [micro-dieseling](https://www.hyprofiltration.com/blog/topic/micro-dieseling) [thermal event](https://www.hyprofiltration.com/blog/topic/thermal-event) [ISO 4406](https://www.hyprofiltration.com/blog/topic/iso-4406) [vacuum dehydrator](https://www.hyprofiltration.com/blog/topic/vacuum-dehydrator) [fluid samples](https://www.hyprofiltration.com/blog/topic/fluid-samples) [oil analysis](https://www.hyprofiltration.com/blog/topic/oil-analysis) [metal analysis](https://www.hyprofiltration.com/blog/topic/metal-analysis) [paper mill](https://www.hyprofiltration.com/blog/topic/paper-mill) [hydraulic pump](https://www.hyprofiltration.com/blog/topic/hydraulic-pump) [samples](https://www.hyprofiltration.com/blog/topic/samples) [COD](https://www.hyprofiltration.com/blog/topic/cod) [duplex low-pressure](https://www.hyprofiltration.com/blog/topic/duplex-low-pressure) [gearbox](https://www.hyprofiltration.com/blog/topic/gearbox) [contaminination](https://www.hyprofiltration.com/blog/topic/contaminination) [hydraulic](https://www.hyprofiltration.com/blog/topic/hydraulic) [duplex high-pressure](https://www.hyprofiltration.com/blog/topic/duplex-high-pressure) [cellulose media](https://www.hyprofiltration.com/blog/topic/cellulose-media) [filter elements](https://www.hyprofiltration.com/blog/topic/filter-elements) [filter comparison](https://www.hyprofiltration.com/blog/topic/filter-comparison) [aluminum refinery](https://www.hyprofiltration.com/blog/topic/aluminum-refinery) [lab](https://www.hyprofiltration.com/blog/topic/lab)

###### 7 min read

### [Hydraulic and Lubrication Filter Types and Locations](https://www.hyprofiltration.com/blog/bid/257033/hydraulic-and-lubrication-filter-types-and-locations)

 By [Hy-Pro Marketing](https://www.hyprofiltration.com/blog/author/hy-pro-marketing) on Thu, Jan. 31, 2013

Choosing the right filter isn’t just about micron ratings. It’s about protecting uptime, extending fluid life, and preventing avoidable failures. Selecting the right hydraulic or lubrication filter can improve system reliability and prevent costly failures. This guide explains filter types, where they belong, and what to consider when choosing them.

###### Topics: [offline filtration](https://www.hyprofiltration.com/blog/topic/offline-filtration) [duplex low-pressure](https://www.hyprofiltration.com/blog/topic/duplex-low-pressure) [hydraulic](https://www.hyprofiltration.com/blog/topic/hydraulic) [duplex high-pressure](https://www.hyprofiltration.com/blog/topic/duplex-high-pressure) [filter elements](https://www.hyprofiltration.com/blog/topic/filter-elements) [lube oil](https://www.hyprofiltration.com/blog/topic/lube-oil)

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