Hydraulic fittings must match the highest pressure capable in a hydraulic system, which is typically the pressure the pump provides. However, there can certainly be pressure increasing components in machines that can go much higher than the hydraulic relief or a pump pressure capacity, especially when a pressure intensifying cylinder is flow generated. Special attention must apply when designing systems with geared flow dividers because of this effect.
Hoses usually have a burst rating of 4 times the pressure rating so although a lower rated hose can work in a short time, they will fatigue and then fail in a shorter time. It's a good suggestion to then have the failed hose to create certain it will match the hydraulic flow circuit pressure search engine rankings. Sometimes people can simply make a hydraulic hose assembly from the wrong type of hose and won't realize it only until a failure. This can happen even from the factory.
High pressure hydraulic lines for mobile equipment usually come in a few associated with pressure ranges. There are an exceptions to this, especially with hose manufacturers trying to crack into market share by offering different benefits to their customer. 6000 psi pressure rated hose can be typically found on closed loop hydro-static circuits such as track ground drives far better horsepower drives attached to drillers, trenching equipment, etc.
Next, there could be the 4000-psi hose utilized on some among the open loop piston pumping systems involved in manufacturing. The most common hydraulic hose utilised in industry is the 3000 psi rated hose, which is usual with gear pumping circuits used in correlation with questionable cylinders and gear motor systems. There are many hoses 1500 decrease psi ratings for the return lines along with special case requests. Most of these hydraulic lines are accustomed to supply the valves and then go back to oil coolers, hydraulic filters, and the oil reservoir. An individual wonder, why not use the highest pressure hydraulic hose on everything in oil circuit; it is because of the more expensive.
Often, steel lines have advantages over hydraulic rubber hoses because of greater heat rejection, better abrasion resistance, fire resistance, and better pressure fatigue strength. If there is a long distance run to on a machine, it is usually smart idea to install solid steel lines bent into shape for routing the hydraulic oil circuit.
Hoses expand collectively pressure cycle. These hoses usually have a crimped steel end also called a hydraulic fitting. Fatigue failure of a hose will typically happen near the hose end being the rubber hose along with the steel fitting hose end will expand at their different rates. The hydraulic hose end could even be susceptible to the wrong crimp process if the crimping technician is not trained. Steel hydraulic lines are not going to be as flexible as hydraulic hose, so be careful will not preload any factor that they are plugged into when mounting the steel line to the machine.
During manufacturing, a Hydraulic fitting is the last thing carried out on a machine when being built. When technicians and engineers are hurried and under work pressure to meet deadlines, it is the hydraulics and hydraulic hose that usually suffer. Overtime, after complaints come last from the customer or if you have a good technician, almost route the hydraulic hoses and fittings to give method service of the components.