Pilot Operated Cartridge Relief Valve are normally closed pressure regulating valves. When the pressureat the inlet (port P) reaches the valve setting, the valve starts to open to tank (port T), throttling flow to regulate thepressure. These valves are accurate, have low pressure rise vs. flow, they are smooth and quiet, and aremoderately fast.
DN10 Pilot Operated Poppet Type Cartridge Relief Valve
JRP10-01
Structural Composition：
The Pilot Operated Cartridge Relief Valve is a hydraulic control valve widely used in hydraulic systems. The Pilot Operated Cartridge Relief Valve is mainly composed of a pilot valve and a main valve. The pilot valve is a cone valve, which is used to control the opening and closing of the main valve; the main valve is also a cone valve, which is responsible for regulating the flow and pressure of the oil.
OPERATION：
When the inlet pressure is low: the inlet pressure acts on the main valve core, and the generated liquid pressure is less than the main valve core spring force. The main valve core is in a closed state under the action of the spring, and the inlet and outlet oil ports are blocked, and there is no overflow.
Inlet pressure increases: When the inlet pressure increases to the set pressure of the pilot valve, the pilot valve opens, and the pressure oil enters the upper chamber of the main valve core through the damping hole, causing the pressure in the upper chamber to increase. Since the area of the upper chamber is larger than that of the lower chamber, the liquid pressure in the upper chamber of the main valve core is greater than the sum of the liquid pressure in the lower chamber and the spring force, the main valve core opens, and the oil flows back to the oil tank from the overflow port of the main valve core, achieving overflow and pressure stabilization.
FEATURES：
The regulator ensures that the spring will not be compacted.
Optional pressure range up to 350 bar
Fast response to pressure changes
The valve core is heat-treated, hardened and precision-machined to ensure lower internal leakage and longer service life.
All parts are made of high-strength steel.
Universal standard socket is used.
SPECIFICATIONS：
Max.Working Pressure:315bar（4568psi）
Flow:See performance curve.
Internal leakage:Under the opening pressure of 75%, the leakage is ≤10mL/min.
Opening Pressure Definition:Pressure measurement when the flow reaches 2.5% of the nominal flow.
Clossing Pressure:90% of opening pressure
Filtering Accuracy: 25 μ m.
Service Temperature:-40℃~ 120℃(NBR),-26℃~ 204℃(FKM)
Medium: Mineral oil with viscosity of 7.4 ~ 420 CST (50-2000) ssu or synthetic oil with lubricating function.
Standard Pressure Range: 1 ~ 50 bar (15 ~ 725 psi)
40 ~ 99 bar (580 ~ 1436 psi)
60 ~ 150 bar (870 ~ 2175 psi)
130 ~ 315 bar (1885 ~ 4568 psi)
CHARACTERISTIC：
DIMENSIONS：
