Hydraulics systems and its component parts will be found in so many areas of commerce and industry. It exists even on the domestic level. For instance, if you were an independent and self-reliant practitioner of organic gardening on the domestic front, you might be using a water pump to supply your green property with its own water, assuming of course, that you are allowed to do so. And installed to these pumps will be a hydraulics system.
This system of course allows the pump to run efficiently. Helping it to do so will be the inclusion of hydraulic seals. Helping you to appreciate the requirement are the next line or two. The pump will be installed in a strategic and secure area of your grounds. Speaking of which, there will be a covering, protecting the pump from external elements such as the sun, rain and snow. You will appreciate too that if the pump runs on electricity, you would need to protect it from getting wet.
But why would protection from the sun be required. Inevitably, the pump whilst being used will be damp in places. No matter how well valves are sealed (there is that word again), the extremities of the pump’s working could lead to some leakage. And the sun’s extremities could contribute towards the rusting and/or corroding of certain parts of the pump system. The hydraulic seals are internal to the pump’s valves through which water flows.
And these seals of course, protect the innards of the pump’s valves and pipes from rust and corrosion and other damaging entrants aside of water. Along with the water will be mud particles of soil and these could damage internal parts and components if allowed to be unprotected.