Manual hydraulic pump equipment in industrial production can be developed with their size of the product, its workmanship is a matter of concern, in the manual hydraulic pump oil storage tank in place before the operation of the oil to check him, must be checked from the entrance 1CM, to ensure that the oil storage tank is not satisfied, so as to avoid hydraulic oil from the entrance all around, if necessary, add hydraulic oil, Because excessive hydraulic oil may occur.
The pressure gauge is the output pressure, the general hydraulic system has an overflow valve, and the variable pump has one. There will also be one on the system, for example, the limited pressure on the variable pump is 2000psi, then the one on the system may be 2300psi.
One limits the operating pressure of the system, and the other is used to limit the safe pressure of the system after the problem of the first relief valve. Some systems may be installed more relief valves to ensure safety, simply adjusting the relief valve on the pump to adjust the pressure "it is possible" to increase the pressure of the system to produce a greater output on the cylinder, but there is also the possibility of not being able to make the system get higher pressure.
Another point is that the system pressure will be increased after adjustment, but the branch pressure may not be increased. Because some branch pressure will be limited by the pressure reducing valve, for example, the main oil line pressure is 2000psi, because the limit of the pressure reducing valve may only reach 1000psi. No matter how the main oil pressure increases the branch pressure can not be increased to more than 1000psi, then it is necessary to adjust the pressure reducing valve.
