Sealing Shielding

When the Heat is Turned up on Your Polyurethane Seals, Consider Resilon® 4350

When the Heat is Turned Up On Your Polyurethane Seals, Consider Resilon 4350, Engineered Polymer Systems Division, Resilon 4350Have you had problems with your polyurethane seals degrading, especially when exposed to higher heat creating the need to replace your seals more often than you would like? As you probably know, seal replacement creates costly downtime that can be avoided if you have an appropriate seal for the job. Parker's Resilon® 4350 polyurethane is up for this task. Resilon 4350 is designed for sealing at higher temperatures up to 250°F continuous and can withstand short-term excursions of up to 300°F without leakage. 

Understanding the approximate temperature range of Resilon 4350

Resilon 4350 polyurethane was formulated to extend the high-temperature capability of Parker’s proprietary urethanes. Where current, more ordinary polyurethane seals have failed, Parker’s new Resilon 4350 has the highest temperature rating of any specialty polyurethane on the market. It was developed for applications where high temperatures or extended heat history cause failures with current polyurethane seal materials.

In a head-to-head comparison test at 250°F continuous, the Resilon 4350 material presented minimal leakage (< 5 grams) up to 250,000 cycles during a life test. This equates to a 33% longer lifespan compared to the standard 4300 material at this elevated temperature range (Figure 1).

When the Heat is turned up on your polyurethane seals, consider resilon 4350, engineered polymer systems division, resilon 4350Additional testing was completed showing the % seal force retention as the external temperature increased from about 160°F to 250°F. The three materials tested exhibited a linear relationship between the seal force retention and temperature. The Resilon 4350 had a 7-10% higher seal force retention beyond 4300 and the leading competitor of high-temperature polyurethane during this temperature range. The Resilon 4350 still exhibited a 20% seal force retention at 250°F (see Figure 2). Based on the results of this testing, this material is promoted as having a continuous operating temperature range of -65°F to 250°F.

Parker’s Resilon polyurethanes are provided in various profiles for use in a wide variety of applications. With the introduction of Resilon® 4350 the recommended operating temperature range for best performance can now be extended 20° to 25°F higher, giving design engineers the ability to push the envelope.

Follow this link to learn more about Resilon® 4350 and Parker's other Polyurethane 4300 formulations


When the heat is turned up on your polyurethane seals, consider resilon 4350, engineered polymer systems division, resilon 4350


This article was contributed by Eric Woodworth, application engineer, Engineered Polymer Systems Division





Related content: 

Thermal Capabilities & Polyurethane Seal Materials: What Do Temperature Ratings Mean?

High Performance Seals for Extreme Aerospace Environments

Medical Polyurethanes for Life Science Applications

Recent Posts by Author

Parker Chomerics Earns 2018 Outstanding Quality Supplier Award from FCA

We're thrilled to announce that the Chomerics Division of Parker Hannifin Corporation, the global leader in motion and control technologies, has been recognized for its outstanding quality by global...

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...

Semiconductor Fab Processes Benefit From Retention Ribbed EZ-Lok Seals

When it comes to semiconductor fabrication processes, reducing the cost of ownership is a multi-faceted goal approached from a variety of angles. Tool engineers and equipment technicians take pride...

Have a question about Parker products or services? We can help: Contact Us!

Comments for When the Heat is Turned up on Your Polyurethane Seals, Consider Resilon® 4350

Please note that, in an effort to combat spam, comments with hyperlinks will not be published.

Leave a comment