Description
Product Overview
The pressure limiting valve is installed on the side of the high-pressure common rail pipe. When the system oil pressure exceeds the safe working threshold, it automatically opens to release pressure and stabilize the system working oil pressure, protecting the precision components such as the high-pressure oil pump, injector, and high-pressure oil pipe from damage caused by high-pressure overload. After long-term continuous impact of thousands of bar oil pressure, impurities in diesel getting stuck, and internal springs becoming fatigued and aged, there may be failure in pressure relief, continuous over-limitation of rail pressure, restricted equipment power, and increased risk of oil leakage. This product features an integrated complete pressure limiting valve assembly with standardized thread specifications and pressure relief parameters. Installation and disassembly do not require secondary debugging, and it is suitable for maintenance of the common rail fuel supply system of mining excavators, heavy-duty loaders, and large-power diesel generators in mines.
Unique core advantages of the single product
The overall valve body is made of heat-dip-finished alloy steel, preventing rust and corrosion.
The entire steel is treated with galvanization, isolating the cabin water vapor, diesel oil, and rust, making it less prone to rust and sticking in humid and dusty mining conditions. The valve body has high structural strength and can withstand long-term ultra-high oil pressure without deformation.
The valve body is designed with a two-segment hexagonal clamping structure. The force during disassembly is uniform and does not slip.
The valve body is divided into two sections with hexagonal wrench positions for clamping. The force during maintenance and clamping is distributed evenly, and the tightening process will not cause the valve body to twist or the threads to slip. After assembly, the threads are tightly sealed, and there is no leakage of high-pressure fuel.
The standard precision external thread oil port end has strong sealing performance.
One end has a standardized external thread connector, with precisely machined thread profiles. After screwing into the common rail pipe, it achieves high-pressure sealing with a sealing gasket, preventing fuel from leaking through the thread gap. It stabilizes the rail pressure environment.
An internal hard alloy pressure relief valve core is provided, with precise and stable pressure response.
The internal components include a dedicated pressure spring and a mirror surface hard valve core. The pressure relief threshold is uniformly calibrated. When the oil pressure exceeds the limit, it opens immediately for overflow, and it automatically closes when the pressure drops. It precisely maintains the safe working oil pressure of the system, avoiding damage to high-pressure components due to overload.
The valve body is engraved with the model number for quick identification during storage and maintenance.
The outside of the valve body is laser-engraved 369-6662 part number and auxiliary code, which is resistant to diesel wiping and long-term immersion without blurring. It is easy to distinguish when preparing spare parts and matching models to avoid incorrect installation and abnormal oil pressure.
The integrated pre-assembled molding structure eliminates the need for scattered small components.
The valve core, spring, and valve body are pre-assembled into a complete assembly. During maintenance, they can be directly replaced without on-site disassembly and assembly, significantly reducing the probability of maintenance and assembly errors. Applicable scenarios
This product is suitable for large mining excavators with high-pressure common rail fuel supply systems, heavy-duty wheeled loaders, fixed high-power mine diesel generators. It is applicable for the replacement of common rail pressure protection components of heavy construction machinery diesel engines in mining areas under 24-hour full-load operation, continuous high-temperature vibration of the engine compartment, and high-pollution diesel environment with high dust and impurities.
Product Basic Parameters
Product Name: High-pressure Common Rail Pressure Limiting and Relief Valve
Part Number: 369-6662
Main Material: Galvanized alloy steel valve body, hard alloy valve core, high-temperature resistant pressure spring
Structural Feature: Double hexagonal clamping valve body, single-sided external threaded oil passage interface, built-in one-way relief valve core, valve body marked with model identification
Application Conditions: Ultra-high oil pressure continuous impact, engine compartment high-temperature vibration, outdoor dust corrosion heavy electronic control common rail diesel engine
Product Status: New and complete pressure limiting valve assembly, factory completed with pressure relief pressure, high-pressure sealingity, and opening and closing response full machine calibration and testing
Packaging: Single independent hard pipe protection, threaded end equipped with dust-proof plastic plug to prevent transportation from knocking, scratching the threaded end and the internal valve core, supporting single-piece retail, bulk purchase in cartons, and compatible with cross-border small items / carton logistics.
