The pressure required to open the relief valve insert of a plunger pump is usually higher than the nominal operating pressure of the system in a load sensing hydraulic system. The load sensing pressure is set higher than the operating pressure to ensure that the relief valve remains closed under normal operating conditions but opens when system load or demand increases. Here is how load sensing pressure works in a piston pump: 1. Load Sensing Principle: Load sensing is a control strategy used in hydraulic systems to match the output flow of the pump to the demand of the system. It involves sensing the pressure downstream of the pump (at the actuator or load) and using that pressure feedback to adjust the pump's displacement. 2. Load sensing function: When the system is in a neutral state or low demand, the load sensing pressure is relatively low, and the pump operates in standby mode, providing minimum flow. The load sense signal is fed back to the pump control mechanism. 3. Differential pressure: As system demand increases (for example, when a load is applied to an actuator), the pressure downstream of the pump rises. The load sense pressure increases in response to this pressure differential. 4. Pressure differential at which the relief valve opens: The relief valve insert in a plunger pump is designed to remain closed when the load sense pressure falls below a certain threshold (usually set higher than the nominal operating pressure of the system). This higher pressure setting ensures that the relief valve remains closed under normal operating conditions, preventing unnecessary flow diversion to tank. 5. Relief Valve Activation: When the load sense pressure exceeds a preset threshold, the relief valve insert opens, allowing excess flow to be diverted to tank. This prevents system pressure from rising to dangerous levels and protects system components from overpressure conditions. 6. Flow control: The opening of the overflow valve causes the pump to reduce its output flow to match the actual system demand. This flow control feature helps maintain stable and efficient operation while preventing excessive pressure build-up. JR-R-S75C-RP-24-20-NN-N-3-K4N9-A2N-NNN-JJJ-NNN JRRS75CRP2420NNN3K4N9A2NNNNJJJNNN JR-R-S75C-RP-25-20-NN-N-3-C2NH-A8N-NNN-JJJ-NNN JRRS75CRP2520NNN3C2NHA8NNNNJJJNNN JR-R-S75C-RP-25-20-NN-N-3-K4AF-A2N-FFF-JJJ-NNN JRRS75CRP2520NNN3K4AFA2NFFFJJJNNN JR-R-S75C-RP-25-20-NN-N-3-K4NE-A9N-NNN-JJJ-NNN JRRS75CRP2520NNN3K4NEA9NNNNJJJNNN JR-R-S75C-RP-25-20-NN-N-3-K4NV-A9N-FFF-JJJ-NNN JRRS75CRP2520NNN3K4NVA9NFFFJJJNNN JR-R-S75C-RP-25-20-NN-N-3-K4RE-A2N-NNN-JJJ-NNN JRRS75CRP2520NNN3K4REA2NNNNJJJNNN JR-R-S75C-RP-26-20-NN-N-3-C3N9-A8N-NNN-JJJ-NNN JRRS75CRP2620NNN3C3N9A8NNNNJJJNNN JR-R-S75C-RP-26-20-NN-N-3-S1VE-A2N-NNN-JJJ-NNN JRRS75CRP2620NNN3S1VEA2NNNNJJJNNN JR-R-S75C-SF-10-NN-NN-R-E-S1NE-A2N-NNN-JJJ-NNN JRRS75CSF10NNNNRES1NEA2NNNNJJJNNN JR-R-S75C-SF-12-NN-NN-R-E-S1NE-A2N-NNN-JJJ-NNN JRRS75CSF12NNNNRES1NEA2NNNNJJJNNN JR-R-S75C-SF-14-NN-NN-R-E-S1NE-A2N-NNN-JJJ-NNN JRRS75CSF14NNNNRES1NEA2NNNNJJJNNN JR-R-S75C-SF-15-NN-NN-R-E-S1NE-A2N-NNN-JJJ-NNN JRRS75CSF15NNNNRES1NEA2NNNNJJJNNN JR-R-S75C-SF-16-NN-NN-R-E-S1NE-A2N-NNN-JJJ-NNN JRRS75CSF16NNNNRES1NEA2NNNNJJJNNN 7. Load Response: As system demand decreases or returns to neutral, the load sense pressure decreases causing the relief valve insert to close and the pump output flow to increase again. 8. Energy Efficiency: The load sensing function of the plunger pump helps to improve the energy efficiency of the hydraulic system. By adjusting the pump output flow to match the actual needs of the system, the pump delivers only the flow and pressure needed to perform the job. This avoids wasteful energy consumption and reduces the overall power demand of the hydraulic system. 9. Heat dissipation: In a load sensing system, the opening of the relief valve diverts excess flow back to the tank, which helps dissipate the heat generated in the hydraulic system. This is especially beneficial for applications where excessive heat generation could result in reduced system efficiency or potential damage to components. 10. Precise Control: Load sensing allows precise control of hydraulic systems, ensuring that actuators and other components receive the necessary flow and pressure to perform their tasks accurately. This level of control is especially important in applications that require precise movement, positioning or force control. 11. Flexibility: Load sensing provides flexibility for various hydraulic system setups, allowing the same pump to be used for different applications with different load and flow requirements. The pump automatically adjusts its output based on load-sensing pressure, adapting to changing conditions without manual adjustments. 12. Reduced Noise: In a load sensing system, when demand is low, the pump operates at a reduced flow, resulting in quieter operation than a fixed displacement system that continuously delivers flow at its maximum level. 13. System stability: Load sensing helps system stability by preventing pressure spikes and fluctuations during load changes. The pump's ability to maintain a constant load-sensing pressure helps ensure smooth and stable operation under varying conditions. 14. Safety: The relief valve opens at load sensing pressure as a safety feature to prevent overpressure and protect the hydraulic system from potential damage or failure due to overpressure. 15. Reduced Wear: With load sensing, the pump only operates at higher pressure levels when necessary, reducing wear on internal components and extending pump life. 16. Increased overall system efficiency: The load sensing of the plunger pump enables the hydraulic system to operate with increased overall efficiency. By providing flow and pressure only when needed, the system minimizes energy loss, reducing overall power consumption and increasing the energy efficiency of the system. 17. Reduced heat generation: Load sensing helps minimize heat generation by matching pump output to system demand. Since the pump delivers only the necessary flow, there is less fluid circulation and friction, resulting in lower heat generation in the system. JR-R-S75C-SF-18-NN-NN-R-E-S1NE-A2N-NNN-JJJ-NNN JRRS75CSF18NNNNRES1NEA2NNNNJJJNNN JR-R-S75C-SF-21-NN-NN-R-E-S1NE-A2N-NNN-JJJ-NNN JRRS75CSF21NNNNRES1NEA2NNNNJJJNNN JR-R-S75C-SH-22-NN-NN-R-E-S1NE-A2N-NNN-JJJ-NNN JRRS75CSH22NNNNRES1NEA2NNNNJJJNNN JR-R-S75C-SH-24-NN-NN-R-E-S1NE-A2N-NNN-JJJ-NNN JRRS75CSH24NNNNRES1NEA2NNNNJJJNNN JR-R-S75C-SH-26-NN-NN-R-E-S1NE-A2N-NNN-JJJ-NNN JRRS75CSH26NNNNRES1NEA2NNNNJJJNNN JR-R-S75C-TA-20-20-NN-N-C-S1N9-A2R-NNN-ANS-NNN JRRS75CTA2020NNNCS1N9A2RNNNANNSNNN JR-R-S75C-TA-26-20-NN-N-C-C3N7-A2R-NNN-ANS-NNN JRRS75CTA2620NNNCC3N7A2RNNNANNSNNN JR-R-S75C-TB-25-25-NN-E-C-C3NH-A2R-NNN-ANS-NNN JRRS75CTB2525NNECC3NHA2RNNNANSNNN JR-R-S75C-TE-14-20-NN-E-C-S1CE-A2R-NNN-ANS-NNN JRRS75CTE1420NNECS1CEA2RNNNANNSNNN JR-R-S75C-TE-23-20-NN-N-C-C3BX-A2R-NNN-ANS-NNN JRRS75CTE2320NNNCC3BXA2RNNNANNSNNN JR-R-S75C-TF-22-20-NN-N-C-C3BE-A2R-NNN-ANS-NNN JRRS75CTF2220NNNCC3BEA2RNNNANSNNN JR-R-S75C-TF-26-20-NN-N-C-K4NE-A2R-NNN-ANS-NNN JRRS75CTF2620NNNCK4NEA2RNNNANNSNNN JR-R-S75C-TF-26-20-NN-N-C-S1AE-A2R-NNN-ANS-NNN JRRS75CTF2620NNNCS1AEA2RNNNANNSNNN JR-R-S75C-TF-26-20-NN-N-C-S1AF-A2R-FFF-ANS-NNN JRRS75CTF2620NNNCS1AFA2RFFFANSNNN JR-R-S75C-TF-26-20-NN-N-C-S1CE-A2R-NNN-ANS-NNN JRRS75CTF2620NNNCS1CEA2RNNNANNSNNN JR-R-S75C-TF-26-20-NN-N-C-S1NE-A2R-NNN-ANS-NNN JRRS75CTF2620NNNCS1NEA2RNNNANNSNNN 18. Extended service life of components: Reduced heating and wear of components due to load sensing can extend the service life of hydraulic system components, including the plunger pump itself, actuators, valves and other key components. Over time, this means lower maintenance and replacement costs. 19. Reduced operating costs: The combination of energy efficiency, reduced wear, and extended component life help reduce operating costs for hydraulic systems. These cost savings can be significant, especially in applications where hydraulic systems run for long periods of time or are subject to varying loads. 20. Smooth and controlled operation: Load sensing ensures smooth hydraulics and controlled movement. This capability is critical for applications that require precise and predictable motion, such as construction equipment, material handling, and other industrial machinery. 21. Reduced Environmental Impact: By optimizing energy consumption and reducing fluid waste, piston pump load sensing helps reduce the environmental impact of hydraulic systems. It is in line with global efforts to increase energy efficiency and conserve resources. 22. Compatibility with multiple actuators: Load sensing allows a single plunger pump to serve multiple actuators in a hydraulic system without the need for additional complex control systems. This reduces the need for a separate pump for each actuator, saving space and cost. 23. Adapt to Changing Conditions: Hydraulic systems with load sensing can seamlessly adapt to changes in demand and load conditions. When the load-sensing pressure is adjusted according to system requirements, the piston pump optimizes its output accordingly, providing reliable performance under varying conditions. 24. System optimization with multiple pumps: In some cases, load sensing can be applied to systems with multiple plunger pumps. By coordinating the load-sensing pressure of the pumps, the system can efficiently distribute the workload among the pumps, preventing uneven operation and optimizing energy use. Overall, piston pump load sensing is a powerful and complex control strategy with numerous advantages in hydraulic systems. It not only improves system efficiency and performance, but also helps reduce operating costs and environmental impact, making it the first choice for a wide range of applications in various industries.