You likely know that there's a direct link between fluid cleanliness and component life-span. But when it comes to ISO cleanliness codes, does it all look like gibberish to you? If you answered "yes," then we can help. Watch the video below for a great primer on ISO Fluid Cleanliness Codes. You can also find the transcript below the video.
4 min read
[Video] Decoding ISO Fluid Cleanliness Codes
By Hy-Pro Marketing on Thu, Jan. 10, 2013
Topics: iso cleanliness codes video
2 min read
Hydraulic Oil Water Removal
By Hy-Pro Marketing on Wed, Nov. 14, 2012
Water is a compound that is required for practically everything on the earth. But within a lubrication or hydraulic system, it's one of the most damaging contaminants possible. Unfortunately, it's also one of the most common contaminants you'll find in your system.
Topics: water Water Contamination SVR hydraulic oil contaminination
2 min read
What Are the Causes of Varnish in Hydraulic Oil?
By Hy-Pro Marketing on Wed, Nov. 07, 2012
The Problem of Varnish Contamination
Varnish contamination is the inevitable byproduct of many degradation processes in hydraulic and lubrication systems. The effects of varnish on industrial and manufacturing systems range from the nuisance of minor downtime and routine maintenance to, worst case scenarios, multi-million dollar catastrophic failures of major capital equipment.
Topics: contamination varnish SVR hydraulic turbine oil
8 min read
ISO 4406: What Do Those Numbers Mean in the ISO Cleanliness Codes?
By Hy-Pro Marketing on Mon, Oct. 08, 2012
Guest post today by Dan Helgerson. He is the Technical Editor of the Fluid Power Journal, where this article was originally published.
We have been talking a lot about filtration here at the steel mill. My predecessor had done a remarkable job in educating by example, demonstrating the need for good control of the fluids in our hydraulic and lubrication systems. He had helped stop the leaks and had added well-thought-out filtration systems that have resulted in substantial savings and increased productivity.
There is still a lot of work to be done and in pursuing that we have invited a number of vendors in, each offering an approach to getting and maintaining an acceptable fluid cleanliness level. The one thing that they all have brought to the table is a discussion of the ISO Cleanliness code. I was in a meeting with a group of managers when one vendor began to talk about the code. Being a Certified Fluid Power Accredited Instructor (AI), I immediately saw this as an obvious teaching moment, so I asked, “Does anyone here want to know what those numbers mean?” The answer was a quick and resounding, “No!”
Topics: iso cleanliness codes ISO 4406
4 min read
Glass or Cellulose Filter Media?
By Hy-Pro Marketing on Mon, Sep. 17, 2012
Glass or Cellulose: Which Hydraulic Filter Media is Best?
There are several distinct differences between glass and cellulose media. Media selection should be based on the required cleanliness and other unique needs of the system. Evaluate the Beta ratio (efficiency), dirt holding capacity, flow versus pressure drop characteristics, etc. A hydraulic filter supplier should be able to supply more detailed test information in addition to what is supplied in the literature.
Cellulose vs. Glass: Absolute and Nominal Filter Efficiency
Normally, wire mesh and cellulose media elements are nominally rated, which means they might be only 50% efficient at the rated micron size. Most glass media elements are considered to be “absolute” rated which means that they are 99.5% efficient at the rated micron size. Check the Beta ratio before selecting the media as all “
Elements of different media with the same “micron rating” can have substantially different filtration efficiency. The graphic below provides a visual representation of the difference between absolute and nominal filter efficiency.
The illustrated glass element would typically deliver an ISO Fluid Cleanliness Code of 18/15/8 to 15/13/9 or better depending upon the system conditions and ingression rate. The cellulose element would typically achieve a code no better than 22/20/17.
Cellulose vs. Glass: Fibers and Cleaning
Runaway contamination levels at 4μ[c] and 6μ[c] are very common when cellulose media is applied where a high population of fine particles exponentially generate more particles in a chain reaction of internally generated contaminate.
Inorganic glass fibers are much more uniform in diameter and are smaller than cellulose fibers. Organic cellulose fibers can be unpredictable in size and effective useful life. Smaller fiber size means more fibers and more void volume space to capture and retain contaminate.
Topics: hydraulic fluid ISO 16889 cellulose media filter elements filter comparison glass media
2 min read
Vacuum Dehydrator VUD: Real-World Results
By 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 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 total systems cleanliness
2 min read
Oil Vacuum Dehydrators: Managing Water in Rolling Mill Lubricating Oil
By Hy-Pro Marketing on Fri, Aug. 31, 2012
In our last post, Improving Rolling Mill Oil with Vacuum Dehydration, we discussed how the
Topics: hydraulic fluid contamination water Water Contamination rolling mill lubricating oil vacuum dehydrator VUD
2 min read
Improving Rolling Mill Lubricant Oil with Vacuum Dehydration
By Hy-Pro Marketing on Tue, Aug. 07, 2012
Benefits of Vacuum Dehydration for Rolling Mill Lubricant Oil
Steel mills typically use lubricants with high



