Seals & O-rings
How Much Do You Know About Compressive Stress Relaxation? CSR Part 3
Parts 1 and 2 of this series discussed the theory behind CSR testing and what to look for in a CSR result curve.  This 3rd and final section will focus on how to use CSR data and apply it to real...
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How Much Do You Know About Compressive Stress Relaxation? CSR Part 2
In Part 1 of this series, the theory behind Compressive Stress Relaxation (CSR) testing was discussed, as well as a brief discussion of the fixtures used to measure it. In Part 2, we will explore what...
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How Much Do You Know About Compressive Stress Relaxation? CSR Part 1
Compressive Stress Relaxation (CSR) is a means of estimating the service life of a rubber seal over an extended period of time. As such, it can be thought of as the big brother of compression set...
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Reduce Downtime and Costly Seal Replacements: Seal Failure Diagnosis Part 2
As mentioned in part one of our seal failure blog series, O-ring and seal failures are often due to a combination of failure modes, making root cause difficult to uncover. It's important to gather...
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Installation of Linear Fluid Power Seals
  So, you’ve unboxed the shiny new Parker seals you ordered – now what?  Installing seals for the first time can be challenging without the right know-how and tools. In this article we’ll discuss best...
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Reduce Downtime and Costly Seal Replacements: Seal Failure Diagnosis Part 1
There are many situations where an O-Ring may not last as long as one thinks that it should. When the expectation is realistic and yet the seal fails earlier than expected, the...
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How to Solve Large-Size Sealing Challenges at Temperatures up to 800 °C
When classic sealing materials – for instance in temperature ranges above 300°C and below -50°C – reach their limits alternative materials are required such as metal with appropriate coating/plating....
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What to Know About O-Ring Cytotoxicity and the Pharmaceutical Industry
Most pharmaceutical manufacturers produce drugs in large vats of living cell cultures. For the production of these drugs, it is extremely important to ensure that these cell cultures are not exposed...
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Low Drag Dynamic Sealing for Hydraulic Clutch Applications
As automatic transmissions become more advanced as a system, the components within must evolve as well. Performance drives the design and there are many factors that must mesh together to achieve the...
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3 Advantages of a Double Chamfer Radial Seal
More often than not, an O-ring makes for a great sealing element. They seal over a wide range of pressure, temperature and tolerance. Normally they require very little room, are readily available,...
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Answers to Your In-Service Rubber Properties Questions
Are you uncertain of what to look for when comparing material data reports for various elastomers?  Ever wonder about the impact a seal’s durometer has in the application? Have you asked, ‘What...
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How to Read a Rubber Test Report: The 4 Most Common Misunderstandings
We've all done it at least once: looked at a report, read the numbers on it, and come up with exactly the wrong conclusion. Pass/fail limits and results are printed right there, but for some reason,...
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Is an ASTM Callout the Best Way to Specify Your Elastomer Needs?
I have had many discussions with customers as to the value of using an ASTM elastomer compound description on their prints to define a specific application or elastomer requirement versus listing...
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Large-Size PTFE Seals Withstand Aggressive Media and High Temperatures
Seals made of the fluoropolymer PTFE are used where many other sealing materials (such as rubber elastomers, polyurethanes, fabric-reinforced elastomer seals, etc.) reach their limits in terms of...
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Semiconductor Fabs Lower Cost of Ownership with HiFluor Materials
In our July Semiconductor entry, we noted that lowering the cost of ownership is a multi-faceted goal. We discussed how one of the areas for potential improvement is mechanical design and how the...
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5 Factors to Consider When Determining Compressive Load of a Seal
Closure force requirements are an important consideration for sealing applications, and the Applications Engineering team is often asked for guidance as to how to minimize or predict the amount of...
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The Truth About Hydraulic Cylinder Drift
I had a brief career in construction. We used an old hydraulic manlift for elevated projects, and it had a problem – we would start the day eye-level with our work, and after an hour would realize we...
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What Does a Good Seal Engineering Drawing Look Like?
You just spent 6 months testing, stretching, aging and exposing your new seal design to 12 different chemicals. Finally, you are done, so what does a good technical drawing for a seal include?...
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Observations From the Electric & Hybrid Vehicle Technology Expo NA
Another Electric & Hybrid Vehicle Tech Expo North America has concluded and it is evident that this show has grown by leaps and bounds. In just a few years since Parker Hannifin has started...
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Why is Outgassing Critical in Optics and Electronics Applications?
For some applications, a critical component of selecting a seal material is a phenomenon known as “outgassing”. However, even within the elastomer community, outgassing is not something that...
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