A hydraulic system is only as capable as the fluid conveyance technologies it consists of. Among the most important components of any hydraulic system are the seals, wipers and O-rings that contain the fluid. Given the pressure and temperature extremes that the systems experience, utilizing the right kind of material for sealing can be the difference between years of successful operation and frequent failures and breakdowns.
Advances in fluid conveyance
One of the most significant advances in fluid conveyance technologies is Parker's Resilon® 4300 polyurethane. Based on PPDI (p-phenylenediisocyanate) chemistry, Resilon is a thermoplastic polyurethane that is in some ways similar to other PPDIs. However, its performance represents a combination of the best characteristics of many different compounds, all combined into a single polyurethane:
- Resilon can withstand temperatures from -65° F to 275° F (-54° C to 135° C), making it suitable for just about any application in which it could be used. In addition to withstanding extreme temperatures, it also maintains a lower rate of hysteresis throughout its range of operation than MDI or TODI-formulation thermoplastic polyurethane seals.
- Its 8625 psi (595 bar) tensile strength enables Resilon to withstand high stresses and heavy loads without failing.
- Resilon has a 63 percent rebound rate and is able to rebound very quickly, making it appropriate for applications that require repeated fast motions as well as those that have brief spikes in pressure.
- It is capable of ultimate elongation of 560 percent in the 4300 variant.
- It has been shown to produce less frictional heat when in motion than other similar materials
All of these technical benefits mean that, for extreme applications, Resilon is the only suitable choice. In less demanding applications, Resilon seals and o-rings still have longer service lives than components made of alternate materials. They also resist extrusion and can be set under compression while still maintaining contact to keep seals intact.
Resilon uses and benefits
Resilon 4300 polyurethane is utilized for a range of products in many standard sizes and shapes, such as o-ring and wiper formats, to fit most applications. Parker also offers D-rings made of Resilon 4300 polyurethane. This shape offers the performance of a traditional multi-component seal but with longer life. In addition, its unique shape makes it easier to install and reduces the risk that the seal will be cut or otherwise damaged as a part of the installation process.
Contact Parker to learn more about Resilon 4300 thermoplastic polyurethane. It is part of our comprehensive line of fluid conveyance technologies that help to increase the function of your hydraulic systems while also increasing their ability to operate without failure.
Related articles of interest: