Hydraulic systems are capable of operating under extremely high pressures. On average, most hydraulic systems' operating pressures are anywhere between 1,000 and 5,000 PSI (lbs. per square inch), according to Science Ray. However, it is not uncommon for special applications to call for hydraulic systems that operate at pressures over 10,000 PSI.
While hydraulic systems are linked with high initial purchase costs, the cost is slightly offset by low operating costs. Since hydraulic systems operate at such high pressures, components need to be constructed out of extremely durable, and subsequently expensive, materials.
Hydraulic fluids are incompressible; they transfer force rather than absorb it. This is why hydraulics can provide such high levels of force. Many tools are powered by hydraulics. These tools are very durable and can last for more than 15 years with little maintenance, according to Mobile Hydraulic Equipment Company. Hydraulic tools can operate in sub-zero environments without the risk of freezing up.