Seals play a crucial role in different hydraulic systems. However, incorrect installation, poor maintenance, and wrong seal selection can mean numerous hydraulic system problems. For instance, leakage in hydraulic, pumping, or sump systems is a typical problem with faulty hydraulic seals. Nevertheless, none of these problems can occur if you know what makes ideal hydraulic seals.
A refined selection procedure is also imperative when choosing hydraulic seals, and here are four essential factors to consider during the process:
The temperature has a considerable effect on whichever type of seal material that's used. However, the impact is significant when it comes to secondary hydraulic seals. According to MachineDesign, standard synthetic materials have a temperature limitation of between 225°F and 600°F. Asbestos may rise to 650°F (343 C), but anything above works best with metallic bellows or piston rings. Furthermore, lubrication is critical to reducing the amount of heat on seal interfaces. When working with hydraulic seals, you can fix thermal issues using cooling chambers as well.
Resistance to Wear
Besides temperature, abrasive media and chemicals affect your seal's wear resistance. To minimize wear, consider using an excellent lubricant for your seal heads and materials. Furthermore, use materials that are resistant to corrosion depending on your sealed fluid. Keep in mind that faulty hydraulic equipment can dry up face materials and lead to premature seal failure. However, you can avert this problem by using double hydraulic seals.
One precaution you can take to alleviate premature failure is cleaning up seal faces before installation. When working with abrasion-prone fluids that may contact air, consider installing a buffer zone between seal faces and the exteriors. Ensure thorough cooling or heating to dissolve any abrasive material attached to the seals when working with fluids that give rise to abrasives at specific temperatures. As mentioned earlier, opt for double seals when there is zero contamination in the sealed liquid.
Another critical aspect to note is the compatibility of the sealed fluid and your hydraulic seal faces. For instance, consider graphite as an ideal sealing material because of its high thermal qualities. You may also opt for chrome, stainless steel, or iron-plated seal faces. However, ceramic offers exceptional anti-wear and corrosion-resistant properties. Sadly, it's vulnerable to tensile stress and cracks caused by thermal shocks.
These four essential factors play a pivotal role in how you choose your hydraulic seals. They are crucial in guiding your selection process when looking for dependable hydraulic seals for your applications. Also, remember to work with an experienced hydraulic system provider for advice in choosing your seals.