English
Product Description
Pressure relief valves (pressure limiting valves) are an important safety device used to protect the system from overpressure damage.
Model classification
There are many models of pressure relief valves, common models include:
sizePLV4500X pressure relief valve
working principle
PLV2 and PLV4 pressure relief valves Under normal conditions, the valve remains closed. When the system pressure exceeds the set value, the first-stage piston will open and gradually reduce the oil pressure in the oil rail until the second-stage piston is activated to achieve a balance between rail pressure and bleed flow, maintaining rail pressure at a low level, thus entering the so-called "limp home mode".
500X pressure holding pressure relief valve When the system pressure exceeds the set value, the pilot valve will automatically open, allowing part of the water to be discharged through the ball valve to reduce the system pressure; when the system pressure drops below the set value, the pilot valve will close and the main valve will also close accordingly, restoring the system. Normal operation.
application scenarios
PLV2 and PLV4 pressure relief valves
500X pressure-holding pressure relief valve
FAQ
How many production lines in your factory?
5 production lines
What is your MOQ?
100 pieces
Can you design the equipment according to our size?
Yes
What is the purpose of a pressure relief (or pressure limiting) valve?
It protects the system by releasing excess pressure when it exceeds a predetermined limit, preventing damage to components and ensuring safe operation.
How does a pressure relief valve work?
It stays closed during normal operation but opens when system pressure surpasses the preset threshold, allowing fluid or fuel to bypass or return to the reservoir, thereby reducing pressure.
Where is the valve typically installed?
It is usually installed in the fuel rail (in common rail diesel systems) or in the hydraulic circuit where pressure regulation is critical.
What are the signs of a failing pressure limiting valve?
Common symptoms include inconsistent pressure, engine performance issues, frequent activation of warning lights, or fuel leakage around the valve.
Can the opening pressure of the valve be adjusted?
Most standard models are pre-set at the factory and cannot be adjusted. Some specialized or industrial valves may allow pressure calibration.
Is it necessary to replace the valve after it opens?
In some designs, the valve is single-use and must be replaced after activation. In others, it resets automatically. Always refer to the manufacturer's specifications.
Company Introduction
Changzhou Huahui Fuel Injection Equipment Co.,Ltd's main products include S and P series long and short injector assembly and injector nozzle parts. Injection pumps used in 165-1125 single-cylinder engines and plungers and oil delivery valve parts used in injection pumps. In recent years, with the efforts of our scientific research personnel, we have successively developed P series BQ type, PW type, P7 type, P8 type, PE type, PN type, P7100 type, P2000 type, high-pressure common rail series, etc., a total of more than 100 types of plunger parts and electronically controlled single pumps.
