The Pressure reduction port Cartridge Relief Valve are used as pressure limiting devices in hydraulic circuits requiring fast response and low hysteresis.
DN20 Pilot Operated Pressure reduction port check Cartridge Relief Valve
JRPC20-11
OPERATION：
1. Overflow and pressure regulation
Initial state: the main valve core closes the main oil circuit under the spring preload, and the system pressure is transmitted to the pilot valve chamber through the damping hole.
Pressure trigger: When the system pressure exceeds the set value of the pilot valve spring, the pilot valve opens, the oil flows back through the external leakage port, the pressure difference at both ends of the main valve core is unbalanced, and the main valve opens to overflow.
Pressure reduction: Introduce external pressure through the external leakage port, dynamically adjust the effective preload of the main valve spring, and realize pressure graded control.
2. Oil replenishment function
When the system pressure drops to a certain level due to leakage or other reasons, the oil replenishment check valve opens, and the oil enters the system through the check valve to replenish the oil loss in the system, maintain the system pressure stable, and avoid suction.
FEATURES：
The valve core and valve sleeve are hard to handle and durable.
Industrial conventional valve hole.
Respond to pressure changes quickly and smoothly.
SPECIFICATIONS：
Max.Working Pressure:315bar（4568psi）
Flow:See performance curve.
Internal leakage:Under the opening pressure of 75%, the leakage is ≤3mL/min.
Opening Pressure Definition:Pressure measurement when the flow reaches 2.5% of the nominal flow.
Clossing Pressure:90% of opening pressure
Reverse Opening Pressure: ≤2bar(29psi)
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: 160 ~ 315 bar (2320 ~ 4568 psi)
If you have special requirements for other performance or installation, please contact us and we will provide exclusive customized services
CHARACTERISTIC：
DIMENSIONS：
Application Scenario：
Engineering machinery: such as excavators, loaders, etc. In the hydraulic systems of these equipment, the Pressure reduction port Cartridge Relief Valve with a pressure multiplier port can effectively control the pressure of the hydraulic system, ensure the normal operation of the equipment, and provide a suitable pressure oil source for some auxiliary components.
Metallurgical equipment: In metallurgical equipment such as rolling mills and continuous casting machines, this Pressure reduction port Cartridge Relief Valve can be used to control the pressure and flow of the hydraulic system to ensure precise control and stable operation of the equipment, and improve production efficiency and product quality.
Ship hydraulic system: In the hydraulic systems of ship steering gears, hoists, etc., this Pressure reduction port Cartridge Relief Valve can realize the pressure protection and oil filling functions of the hydraulic system to ensure the safe navigation and normal operation of the ship.
FAQ：
What is the function of the remote control port?
Remote pressure regulation: The Pressure reduction port can achieve two or more levels of system pressure regulation to meet the system pressure requirements under different working conditions.
