Description
416-7101 High-pressure limiting valve specifically for large-power diesel engine common rail system, a core precision component for overload safety protection of high-pressure oil flow. The valve body adopts a gray metal + black two-color segmented hexagonal structure, with a standard external thread oil passage interface at the front end, and a protective sleeve at the rear end. Inside, a pressure spring and a hard alloy pressure relief valve core are pre-installed. The factory has completed the calibration of the pressure relief threshold, high-pressure sealing, and shock resistance performance. It is used to limit the maximum working oil pressure of the common rail pipe, solving problems such as excessive oil pressure, pipeline pressure relief, engine power limitation, and oil circuit leakage. It is a single-piece independent protective pipe, suitable for direct replacement with the corresponding model of construction machinery / heavy truck common rail system. Product Overview
The fuel injectors are installed on the engine cylinder head, receiving precise electrical control signals to spray high-pressure fuel accurately, achieving stratified combustion. Under long-term mining conditions of 24-hour full-load operation, thousands of bar of high-pressure impact, and impurities from diesel washing, the valve core seal wears out, the sealing gasket ages, and the electromagnetic valve fails. This will result in single-cylinder lack of ignition, significant power loss, severe black smoke in the exhaust, and dilution of the engine oil. This product is an integrated finished fuel injector. The installation outer diameter, plug pins, and sealing points are standardized. The entire machine is completed with full-condition flow calibration at the factory, and for maintenance, it can be directly installed on the vehicle. It is suitable for large excavators, heavy-duty loaders, and large-power diesel generators for oil injection maintenance in mines.
Core advantages of the single-piece kit
Segmentally thickened alloy steel valve body, resistant to high pressure and deformation
Multi-stage combined quenched and tempered alloy steel shell, with an outer wall thickened for reinforcement, able to withstand long-term ultra-high oil pressure impact, and less likely to deform or crack under cabin high-temperature vibration, preventing high-pressure oil leakage from the valve body.
Dual needle waterproof electronic control plug, stable signal transmission and oxidation resistance
Dual metal pins as conductive terminals, with built-in gold-plated contacts, an outer layer of insulating waterproof sheath, isolating diesel and water vapor erosion, with no delay in electronic control signal transmission, eliminating fuel injection lag and intermittent oil supply faults.
Red-colored high-pressure fluororubber sealing ring in the middle, isolating the high-temperature gas in the combustion chamber from circulating into the oil circuit
Pre-installed red high-temperature resistant fluororubber O-ring, compatible with the cylinder head installation hole sealing position, preventing high-pressure fuel from leaking outward, while blocking the high-pressure fuel from escaping, stabilizing the common rail working oil pressure.
Extended precision multi-hole fuel injector at the front end, ensuring full heavy-load atomization
Extended mirror-guided piston combined with multiple symmetrical fine spray holes, allowing high-flow high-pressure fuel to be uniformly and finely atomized, matching large-power combustion chambers, ensuring complete combustion, reducing carbon buildup, and lowering black smoke and fuel consumption.
Integrated one-piece electromagnetic control valve, precise and controllable spray timing
Internal integration of a precise electromagnetic flow valve core, capable of precisely completing pre-spray, main spray segmented spraying, alleviating engine detonation, optimizing idle stability, and providing linear and without-jolt power output for heavy-load climbing.
Flow calibration is completed at the factory, and after replacement, no on-site debugging is required
The finished product is uniformly calibrated for injection flow, opening pressure, and atomization effect, with high consistency of each unit. After replacement, the equipment's original factory power performance can be quickly restored, significantly reducing maintenance and debugging time. Applicable scenarios
It is suitable for large-scale mining excavators with high-pressure common rail fuel supply system, heavy-duty wheeled loaders, fixed power diesel generators in mines, and is applicable for the replacement of diesel engine fuel injection components in heavy construction machinery operating in diesel environments with high pressure, continuous operation for 24 hours, high-temperature vibration, and high dust and impurity content.
Product basic parameters
Product name: 370-7280 Electronic Control Common Rail Injector Assembly
Part number: 370-7280
Main material: Tempered hardened alloy steel valve body, fluorine rubber sealing ring, waterproof insulated electronic control component
Structural features: Segmented alloy valve body, tail double-pin electronic control plug, middle red high-pressure sealing O-ring, front end extended fuel injector nozzle, built-in electromagnetic control valve core
Application conditions: Ultra-high fuel pressure continuous injection, 24-hour full-load operation, high-temperature vibration, high-dust and impurity diesel environment, high-power electronic control common rail diesel engine
Product status: New and complete fuel injector assembly, factory completed with complete calibration and testing of atomization performance, high-pressure sealingity, electronic control response, and injection flow
Packaging: Single independent shock-proof hard cardboard box packaging, dust protection plugs are equipped at both ends of the fuel injector nozzle and the electronic control plug to prevent the precise fuel injection holes and conductive pins from being scratched and damaged during transportation, supporting single-piece retail and bulk purchase in cases of multiple pieces, and compatible with cross-border small package / container logistics
Product overview
Pressure limiting valve is installed on the side of the high-pressure common rail pipe. When the fuel pressure exceeds the safety set value, it automatically opens to release pressure and guide the excess fuel back to the low-pressure oil circuit to protect the precision components such as the high-pressure oil pump, fuel injector, and high-pressure oil pipe from being damaged by excessive pressure. Long-term thousands of bar high-pressure continuous impact, wear of diesel impurity particles, fatigue aging of internal springs, may result in failure of pressure relief, high-pressure oil circuit pressure remaining high, triggering fault torque limit, and increased risk of leakage in high-pressure pipeline. This product is an integrated pre-installed pressure limiting valve assembly, with standardized thread specifications and pressure relief parameters, no need for on-site debugging, compatible with mining excavators, heavy-duty loaders, heavy-duty long-distance freight trucks with high-power common rail diesel engines for maintenance.
Core advantages of individual products
Dual-color segmented hexagonal valve body, stable and easy to install without slipping
The valve body is divided into two segments for hexagonal wrench positioning, the gray metal segment is responsible for oil circuit sealing, and the black segment serves as a protective buffer; the force applied during maintenance clamping is uniform, and the tightening process will not cause valve body twisting or thread slippage, and the assembly seal is tight without high-pressure fuel leakage.
Precise standard external thread at the front end, strong sealing at the oil circuit connection
The standardized metric thread joint at the rear end, the rolled precision of the thread is high, when paired with the matching sealing gasket and screwed into the common rail pipe, it completely seals the thread gap, preventing high-pressure fuel from leaking through the interface, ensuring stable system working oil pressure.
Integrated protective sleeve at the rear end, protecting the valve core during storage and transportation
The black extended protective sleeve at the tail end wraps the internal valve core end, protecting the valve core's precise sealing surface from scratches and clogging of the fuel injection holes during storage and cross-border transportation, avoiding damage to the valve core's precise sealing surface.
Built-in hard alloy pressure relief valve core, precise and long-lasting pressure response
The internal is equipped with tempered high-pressure spring and mirror surface hard alloy valve core, with a micrometer-level sealing contact surface, when the oil pressure exceeds the limit, it opens for pressure relief instantly, and quickly closes and resets when the pressure drops, long-term high-frequency opening and closing will not cause fatigue failure, precisely maintaining the safe oil pressure range.
Overall made of high-pressure composite alloy steel material, resistant to corrosion and wear
The metal valve body is processed from quenched alloy steel, the surface is treated with anti-corrosion passivation treatment, resisting diesel and water vapor corrosion in mining areas, able to withstand continuous ultra-high pressure impact, longer service life in 24-hour full-load harsh working conditions.
Integrated pre-fabrication, convenient for maintenance and assembly
The valve core, spring, and valve body are pre-assembled into a complete assembly, no need for on-site disassembly and matching of small parts, the replacement process is simple, significantly reducing the probability of maintenance and assembly errors. 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 fixed high-power mine diesel generator sets. It is applicable to the major overhaul and replacement of the common rail pressure protection components of heavy-duty diesel engines in mining areas under conditions of 24-hour uninterrupted full-load operation, continuous high-temperature vibration of the engine compartment, and high-pollution and high-dust diesel environment.
Product Basic Parameters
Product Name: High-pressure Common Rail Pressure Limiting and Discharging Valve
Part Number: 416-7101
Main Material: Quenched alloy steel valve body, hard alloy valve core, high-temperature resistant pressure spring
Structural Feature: Two-color segmented hexagonal valve body, front end external thread oil passage connector, rear end protective sleeve, built-in one-way discharge valve core
Application Conditions: Ultra-high oil pressure continuous impact, engine compartment high-temperature vibration, outdoor dust corrosion heavy-duty electronically controlled common rail diesel engine
Product Status: New and complete pressure limiting valve assembly, factory completed with full set of calibration and testing for pressure relief, high-pressure sealingity, and opening and closing response of the entire machine
Packaging: Single independent hard pipe protection, threaded end equipped with dust-proof plastic plug to prevent transportation from knocking, scratching, or damaging the threaded end and valve core sealing surface, supporting single-piece retail, bulk purchase in cases, and compatible with cross-border small package / case logistics
