Sealing Shielding

Optimized Fluid Conveyance Systems for Heavy-Duty Vehicle Chassis

Wheel loader image for Parker at IFPEShow  2014- Heavy Duty Vehicle Design Parker Hannifin Motion and Control Technology BlogA 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

Parker's Resilon Polyurethane - Sealing and Orings - Heavy Duty Vehicle Design Parker Hannifin Motion and Control Technology BlogAll 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.

Chassis Rendering for heavy duty vehicles Parker HannifinContact 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:

Designing a Heavy-Duty Construction Vehicle Cab

Electronic Control Systems for Heavy-Duty Vehicle Implements

Natural Gas Engines for Heavy-Duty Applications

New Wiper for Hydraulic Cylinders with Integrated Dirt Shield

Hydraulic Technologies and Key Markets

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