JRP10-01 is a pilot operated, spool type, pressure relief valve.When the set operating pressure is reached, the poppet spool opens and connects the protected line with the return line to the tank. By means of the adjusting mechanism, the poppet spool is pressed onto a seat which is screwed into the lower cartridge opening by a helical spring. The poppet spool is opened and closed hydraulically dampened. This makes the operation of this cartridge very stable. Thanks to the poppet/spool principle and the direct operation, these Pilot Operated Relief Valve are rapid acting and free of leakage oil. The reduced diameter of the seat produces a higher pressure drop and a lower flow throughput performance than Pilot Operated Relief Valve of the same size.
DN10 Pilot Operated Spool Type Cartridge Relief Valve
JRP10-06
PRODUCT INTRODUCTION：
JRP10-01 is a pilot operated, spool type, pressure relief valve.When the set operating pressure is reached, the poppet spool opens and connects the protected line with the return line to the tank. By means of the adjusting mechanism, the poppet spool is pressed onto a seat which is screwed into the lower cartridge opening by a helical spring. The poppet spool is opened and closed hydraulically dampened. This makes the operation of this cartridge very stable. Thanks to the poppet/spool principle and the direct operation, these Pilot Operated Relief Valve are rapid acting and free of leakage oil. The reduced diameter of the seat produces a higher pressure drop and a lower flow throughput performance than Pilot Operated Relief Valve of the same size.
OPERATION：
When the pressure at the P-port does not reach 90% of the set pressure of the spring, P-to-T is blocked; when it exceeds 90% and the pressure continues to rise, P-to-T begins to overflow to the highest set pressure of the spring.
FEATURES：
The valve core and valve sleeve are hard to handle and durable.
High pressure regulation accuracy: The pilot valve can accurately control the opening pressure of the main valve, so that the system pressure is stable near the set value, and the pressure regulation deviation is small.
High sensitivity: It can quickly respond to changes in system pressure, adjust the overflow volume in time, and ensure the stability of system pressure.
Large flow: It can adapt to large flow conditions and is suitable for high-pressure and large-flow hydraulic systems.
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: 130 ~ 315 bar (1885 ~ 4568 psi)
CHARACTERISTIC：
DIMENSIONS：
FAQ：
Why is the pilot-operated relief valve more suitable for high-pressure and large-flow systems than the direct-acting relief valve?
Direct-acting relief valves require a hard spring with high stiffness when operating at high pressure or high flow, which makes adjustment difficult and causes large pressure fluctuations. However, pilot-operated relief valves use graded control of the pilot valve and the main valve, and the main valve spring has low stiffness, so they can still work stably even at high pressure or high flow.
Spool Type Spool Type Spool Type Spool Type Spool Type Spool Type Spool Type Spool Type Spool Type
