---
title: Donaldson Hy-Pro Lube & Hydraulic Filtration Industry Blog | vacuum dehydrator
description: vacuum dehydrator | 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 Vac-U-Dry Vacuum Dehydrator (VUD) Explainer Video](https://www.hyprofiltration.com/blog/vud)

 By [Hy-Pro Marketing](https://www.hyprofiltration.com/blog/author/hy-pro-marketing) on Tue, Jul. 26, 2022

[![](https://www.hyprofiltration.com/hubfs/vud.png) ](https://www.hyprofiltration.com/blog/vud)

## Contamination is Complicated; Removing it is Easy

### Check out our latest product explainer video on Hy-Pro's VUD

### The optimized balance between heat, vacuum, process design, and an easy, user-friendly operating system for removal of water and particulate from hydraulic and high viscosity lubricating oils. Equipped with generously sized, high-efficiency filtration, the VUD is the ultimate oil purifier. Keeping fluids clean and dry extends component and bearing life, increases productivity, minimizes downtime, and extends useful fluid life. The VUD is ideal for removing all forms of water, including free, emulsified, and dissolved water and gas from hydraulic and lubricating oils.

 

###### Topics: [contamination](https://www.hyprofiltration.com/blog/topic/contamination) [fluid cleanliness](https://www.hyprofiltration.com/blog/topic/fluid-cleanliness) [vacuum dehydration](https://www.hyprofiltration.com/blog/topic/vacuum-dehydration) [vacuum dehydrator](https://www.hyprofiltration.com/blog/topic/vacuum-dehydrator) [fluid contamination](https://www.hyprofiltration.com/blog/topic/fluid-contamination) [VUD](https://www.hyprofiltration.com/blog/topic/vud) [cutdirtcutcosts](https://www.hyprofiltration.com/blog/topic/cutdirtcutcosts) [hypro](https://www.hyprofiltration.com/blog/topic/hypro)

###### 2 min read

### [The Dollars and Sense of Fluid Cleanliness](https://www.hyprofiltration.com/blog/a-penny-saved-is-a-penny-earned)

 By [Hy-Pro Marketing](https://www.hyprofiltration.com/blog/author/hy-pro-marketing) on Thu, Apr. 08, 2021

# The Dollars and Sense of Fluid Cleanliness

The old phrase will always stand true, "A penny saved is a penny earned." When it comes to businesses and their pennies, every penny counts. When problems during the production and manufacturing process are fixed, people will say "pennies well spent." So, if pennies are so important, then what about dollars? What about thousands, or hundreds of thousands of dollars? **What about millions of dollars**? In today's production and manufacturing economy, these kinds of numbers are game-changing.

###### Topics: [vacuum dehydrator](https://www.hyprofiltration.com/blog/topic/vacuum-dehydrator) [fluid contamination](https://www.hyprofiltration.com/blog/topic/fluid-contamination) [bearings](https://www.hyprofiltration.com/blog/topic/bearings)

###### 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)

###### 3 min read

### [[Video] Water Contamination and Removal Methods](https://www.hyprofiltration.com/blog/bid/347342/video-water-contamination-and-removal-methods)

 By [Scott Howard](https://www.hyprofiltration.com/blog/author/scott-howard) on Mon, Jun. 02, 2014

 

 Do you know what the 3 different types of water contamination are? What about the 4 methods to remove water from your fluid? Watch our short video for a thorough explanation of each.

###### Topics: [hydraulic fluid](https://www.hyprofiltration.com/blog/topic/hydraulic-fluid) [water](https://www.hyprofiltration.com/blog/topic/water) [vacuum dehydrator](https://www.hyprofiltration.com/blog/topic/vacuum-dehydrator) [coalesce technology](https://www.hyprofiltration.com/blog/topic/coalesce-technology) [headspace dryer](https://www.hyprofiltration.com/blog/topic/headspace-dryer) [video](https://www.hyprofiltration.com/blog/topic/video) [contaminination](https://www.hyprofiltration.com/blog/topic/contaminination) [filter elements](https://www.hyprofiltration.com/blog/topic/filter-elements)

###### 4 min read

### [What is a Vacuum Dehydrator?](https://www.hyprofiltration.com/blog/bid/317139/what-is-a-vacuum-dehydrator)

 By [Scott Howard](https://www.hyprofiltration.com/blog/author/scott-howard) on Mon, Sep. 30, 2013

[![](https://www.hyprofiltration.com/hubfs/VUD%20Vacuum%20Dehydrator-890287-edited.jpg) ](https://www.hyprofiltration.com/blog/bid/317139/what-is-a-vacuum-dehydrator)

 

Article Summary  
This article breaks down the three types of water found in industrial oil systems—free, emulsified, and dissolved—and why each one matters to fluid condition and equipment reliability. It also explains how vacuum dehydration removes water, including dissolved water that many other methods cannot effectively address.

If the hydraulic, lubricating, compressor or gear oil you use is not made of a water base in  formulation , then water is considered a contaminant and must be recognized and managed.

###### Topics: [water](https://www.hyprofiltration.com/blog/topic/water) [Water Contamination](https://www.hyprofiltration.com/blog/topic/water-contamination) [vacuum dehydrator](https://www.hyprofiltration.com/blog/topic/vacuum-dehydrator) [contaminination](https://www.hyprofiltration.com/blog/topic/contaminination) [VUD](https://www.hyprofiltration.com/blog/topic/vud)

###### 1 min read

### [Improving Rolling Mill Lube Oil Performance and Useful Life - Part 3: Solution](https://www.hyprofiltration.com/blog/bid/266469/improving-roll-mill-lube-oil-performance-and-useful-life-part-3-solution)

 By [Hy-Pro Marketing](https://www.hyprofiltration.com/blog/author/hy-pro-marketing) on Mon, Mar. 18, 2013

*![VUD Vac-U-Dry Vacuum Dehydrator](https://www.hyprofiltration.com/hs-fs/hubfs/VUD.jpg?width=284&name=VUD.jpg "VUD Vac-U-Dry Vacuum Dehydrator")At the end of [Part 2](https://www.hyprofiltration.com/blog/), we discussed the winning nature of vacuum dehydration. If you missed Part 1 in the series, you can find it [here](https://www.hyprofiltration.com/blog/bid/266226/improving-roll-mill-lube-oil-performance-and-useful-life-part-1). *

Did you know that hydrogen is the friendliest molecule - meaning that it is most likely seeking partners to attach to? Similarly, the suspended particles in oil actively look for particles to join forces, so they pair with the water. 

This particulate contamination is the catalyst guilty of continuing the degradation of the oil and the increase of emulsified water. The more water there is, the more oxidation that occurrs. This also increases various acids that form as the molecules break down. These acids attack seals, hoses, pumps and metal.

###### Topics: [contamination](https://www.hyprofiltration.com/blog/topic/contamination) [iso cleanliness codes](https://www.hyprofiltration.com/blog/topic/iso-cleanliness-codes) [steel mills](https://www.hyprofiltration.com/blog/topic/steel-mills) [rolling mill lubricating oil](https://www.hyprofiltration.com/blog/topic/rolling-mill-lubricating-oil) [vacuum dehydrator](https://www.hyprofiltration.com/blog/topic/vacuum-dehydrator)

###### 2 min read

### [Improving Rolling Mill Lube Oil Performance and Useful Life - Part 2: Prevention](https://www.hyprofiltration.com/blog/bid/266436/improving-roll-mill-lube-oil-performance-and-useful-life-part-2-prevention)

 By [Hy-Pro Marketing](https://www.hyprofiltration.com/blog/author/hy-pro-marketing) on Fri, Feb. 22, 2013

*![steel mills and oil performance ](https://www.hyprofiltration.com/hs-fs/hubfs/steel-mill-616526_1280-247033-edited.jpg?width=570&name=steel-mill-616526_1280-247033-edited.jpg "steel mills and oil performance ")*

*If you're just tuning in and didn't catch the first part of our steel mill and lube oil series, [click here](https://www.hyprofiltration.com/blog/bid/266226/improving-roll-mill-lube-oil-performance-and-useful-life-part-1).*

When we left off, we just determined how the high levels of emulsified water and high particulate contamination levels work together to cause bearing failure and reduce oil life. So, how do we prevent this expensive combination from happening? We're glad you asked!

###### Topics: [contamination](https://www.hyprofiltration.com/blog/topic/contamination) [iso cleanliness codes](https://www.hyprofiltration.com/blog/topic/iso-cleanliness-codes) [steel mills](https://www.hyprofiltration.com/blog/topic/steel-mills) [rolling mill lubricating oil](https://www.hyprofiltration.com/blog/topic/rolling-mill-lubricating-oil) [oil mills](https://www.hyprofiltration.com/blog/topic/oil-mills) [vacuum dehydrator](https://www.hyprofiltration.com/blog/topic/vacuum-dehydrator)

###### 2 min read

### [Improving Rolling Mill Lube Oil Performance and Useful Life - Part 1: Quality](https://www.hyprofiltration.com/blog/bid/266226/improving-roll-mill-lube-oil-performance-and-useful-life-part-1)

 By [Hy-Pro Marketing](https://www.hyprofiltration.com/blog/author/hy-pro-marketing) on Fri, Feb. 15, 2013

![steel mill equipment and lube oil](https://www.hyprofiltration.com/hs-fs/hubfs/steel-mill-616536_1920-016342-edited.jpg?width=555&name=steel-mill-616536_1920-016342-edited.jpg "steel mill equipment and lube oil")

Premium oils keep steel mills running. It's crucial to protect their quality in order to keep the mills fully functioning. 

In both hot and cold steel mill production, high-demulsibility lubricant is used for backup roller bearing lubrication. Some of these oils are referred to as SD, which stands for super-demulsibility. Not surprisingly, these SD oils are a premium product and come at a premium price. If a manufacturer wants to invest in these big-ticket oils, they obviously want to go to great lengths in order to keep them clean and fully functioning.

Join us for this three-part series as we take an in-depth look at improving rolling mill lube oil performance and useful life.

###### Topics: [contamination](https://www.hyprofiltration.com/blog/topic/contamination) [iso cleanliness codes](https://www.hyprofiltration.com/blog/topic/iso-cleanliness-codes) [steel mills](https://www.hyprofiltration.com/blog/topic/steel-mills) [vacuum dehydrator](https://www.hyprofiltration.com/blog/topic/vacuum-dehydrator)

###### 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)

###### 2 min read

### [Oil Vacuum Dehydrators: Managing Water in Rolling Mill Lubricating Oil](https://www.hyprofiltration.com/blog/bid/213933/oil-vacuum-dehydrators-water-in-rolling-mill-lubricating-oil)

 By [Hy-Pro Marketing](https://www.hyprofiltration.com/blog/author/hy-pro-marketing) on Fri, Aug. 31, 2012

[![](https://www.hyprofiltration.com/hs-fs/file-18425453-png/images/appearanceofwater.png) ](https://www.hyprofiltration.com/blog/bid/213933/oil-vacuum-dehydrators-water-in-rolling-mill-lubricating-oil)

In our last post, [Improving Rolling Mill Oil with Vacuum Dehydration](https://info.hyprofiltration.com/blog/bid/203307/Vacuum-Dehydration-and-Rolling-Mill-Oil), we discussed how the  demulsibility  (ability of the oil to separate from water) of oil is an important characteristic that greatly influences the effectiveness of the lubricant and how a loss of  demulsibility  can result in poorly lubricated bearings, unplanned  downtime  and premature fluid replacement. 

###### Topics: [hydraulic fluid](https://www.hyprofiltration.com/blog/topic/hydraulic-fluid) [contamination](https://www.hyprofiltration.com/blog/topic/contamination) [water](https://www.hyprofiltration.com/blog/topic/water) [Water Contamination](https://www.hyprofiltration.com/blog/topic/water-contamination) [rolling mill lubricating oil](https://www.hyprofiltration.com/blog/topic/rolling-mill-lubricating-oil) [vacuum dehydrator](https://www.hyprofiltration.com/blog/topic/vacuum-dehydrator) [VUD](https://www.hyprofiltration.com/blog/topic/vud)

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