The Rexroth DB20 5X pilot operated hydraulic pressure relief valve is used for pressure relief. The pressure relief valve performance include static performance and dynamic performance.
Static performance including:
1.Pressure adjustment range. Pressure adjustment range refers to the regulator spring is adjusted within a predetermined range, the system pressure can be smoothly increased or decreased, and the pressure is not projecting jump and hysteresis when the maximum and minimum modulation given pressure. Maximum relief valve to allow traffic to its rated flow, work under the flow rated, pressure relief valve should be no noise minimum stable flow relief valve depends on its pressure stability requirements , general provisions for 15% of the rated flow.
2. Opening and closing characteristics. The opening and closing characteristics refers to the pressure relief valve in the steady - state case from the open to closed, charged with pressure by the relationship between the excess flow of the pressure relief valve. It is an important indicator to measure the pressure relief valve set pressure accuracy at rated flow, generally with a relief valve set pressure opening pressure began to overflow, and stop the overflow of a closed pressure respectively with the percentage to measure, the former is called open proportion, the other called closed proportion.
3. Unloading pressure. K is connected with the fuel tank when the remote control of the pressure relief valve opening, when the rated flow the pressure loss is called the unloading pressure.
Rexroth DB20 5X Pilot Operated Hydraulic Pressure Relief Valve
Dynamic performance including:
Static performance including:
1.Pressure adjustment range. Pressure adjustment range refers to the regulator spring is adjusted within a predetermined range, the system pressure can be smoothly increased or decreased, and the pressure is not projecting jump and hysteresis when the maximum and minimum modulation given pressure. Maximum relief valve to allow traffic to its rated flow, work under the flow rated, pressure relief valve should be no noise minimum stable flow relief valve depends on its pressure stability requirements , general provisions for 15% of the rated flow.
2. Opening and closing characteristics. The opening and closing characteristics refers to the pressure relief valve in the steady - state case from the open to closed, charged with pressure by the relationship between the excess flow of the pressure relief valve. It is an important indicator to measure the pressure relief valve set pressure accuracy at rated flow, generally with a relief valve set pressure opening pressure began to overflow, and stop the overflow of a closed pressure respectively with the percentage to measure, the former is called open proportion, the other called closed proportion.
3. Unloading pressure. K is connected with the fuel tank when the remote control of the pressure relief valve opening, when the rated flow the pressure loss is called the unloading pressure.
Rexroth DB20 5X Pilot Operated Hydraulic Pressure Relief Valve
Dynamic performance including:
Dynamic performance. When the overflow traffic of pressure relief valve is a step change from zero to the rated flow, it controls the system pressure increased rapidly and the set value in excess of the rated pressure, then gradually decay to the final stable pressure to complete the dynamic transition process.
Rexroth DB20 5X pilot operated hydraulic pressure relief valve Figuration Drawing:
