Description
Product Overview
The pressure-limiting relief valve is installed at the end of the high-pressure common rail pipe. When the oil pressure in the pipeline exceeds the calibrated safety threshold, it automatically opens to release pressure. Meanwhile, the built-in one-way structure prevents the backflow of high-pressure fuel. Under long-term mining heavy-load, continuous high-pressure oil pressure impact, and impure diesel erosion conditions, the internal valve core sealing surface will wear, resulting in pressure offset, rail pressure loss control failure, insufficient acceleration, rapid oil pressure release after engine shutdown, and difficulty in cold start. This product has standardized specifications for thread, pressure release threshold, and valve body size. By simply replacing the relief valve for maintenance, the oil pressure protection failure can be repaired. It is suitable for large-scale mining excavators, heavy-duty long-distance trucks, and large-power diesel generator sets for maintenance of electronic control common rail engines.
Core Advantages of the Single Item
Split galvanized alloy steel valve body, resistant to rust and pressure, not prone to corrosion
Overall steel hot-dip galvanizing treatment, isolating cabin water vapor, diesel oil, and rust, double-layer segmented shell integrated locking, able to withstand thousands of bar high-pressure continuous impact, no cracking or leakage in long-term jolting conditions.
Double hexagonal clamping structure at both ends, easy to disassemble and assemble without slipping
Both front and rear sections of the valve body are standard hexagonal limit plates, the force of the wrench clamping is uniform, during disassembly and assembly, the internal precision valve core will not be twisted, avoiding valve body deformation and thread damage.
Standard precision external thread at the front end, assembly is tight and does not leak pressure
The rolled standard external thread at the front end, the thread tooth shape is regular, combined with the sealing gasket, after tightening, the assembly gap is filled, no fuel leakage in high-pressure conditions, stable common rail base oil pressure.
Double groups of external wall engraving codes, quick matching of models for inventory and maintenance
Metal surface laser engraving 369-6662 and matching identification code, the characters are resistant to diesel soaking and repeated wiping without fading, quick differentiation of specifications for warehouse storage and on-site maintenance, avoiding incorrect installation resulting in failure of oil pressure protection.
Built-in precision one-way relief valve core, linear response sensitive pressure adjustment
The valve core and valve seat are ground and sealed in pairs, opening to release pressure instantly when overpressure occurs, closing and locking the oil circuit immediately when pressure drops, maintaining stable rail pressure range throughout, eliminating speed drift and acceleration jolts.
Independent pressure calibration at the factory, no need for secondary adjustment during assembly
Each relief valve is individually tested for pressure release opening pressure, high-pressure sealingity, and flow rate, with unified factory parameters. After assembly, it directly matches the original vehicle electronic control system, quickly restoring the oil circuit's safe and stable pressure condition.
Accessory List
1 Complete common rail pressure-limiting relief valve body 369-6662 Applicable scenarios
It is suitable for large mining excavators with high-pressure common rail fuel supply system, heavy-duty wheeled loaders, long-distance heavy-duty freight trucks, and high-power fixed diesel generator sets. It is applicable for 24-hour continuous heavy-duty operations in mines, long-distance freight transportation, continuous high-temperature vibration in the engine compartment, and dusty and impure diesel corrosion environments. The heavy-duty electronic control common rail diesel engine pipeline oil pressure protection components can be replaced.
Product basic parameters
Product name: 369-6662 Common Rail Pressure Limiting Overflow Valve Assembly
Part number: 369-6662
Main material: Galvanized alloy steel valve body, hardened single-direction sealing valve core
Structural features: Segmented double hexagonal valve body, front end external threaded installation interface, outer wall engraved identification code, built-in single-direction pressure relief sealing mechanism
Application conditions: Ultra-high oil pressure overload protection, engine compartment alternating cold and hot, heavy-duty electronic control common rail diesel engine corrosion by diesel medium
Product status: New and complete overflow valve assembly, factory completed with pressure relief pressure, high-pressure sealingity, and flow response full bench calibration and testing
Packaging: Single-piece independent hard tube protection packaging, threaded end equipped with plastic dust-proof plug, foam buffer protection to avoid transportation磕碰划伤 the threaded and valve core sealing surface， supports single-piece retail， bulk purchase in cartons， and is compatible with cross-border small package logistics.
