Description
Product Overview
Double-layer O-rings are respectively assembled into the two sealing grooves on the inner and outer sides of the injector body. They fill the multi-layer clearance between the injector and the cylinder head in layers. The inner ring prevents high-pressure fuel from leaking, while the outer ring prevents outside air and high-temperature gas from invading the oil circuit. Under long-term alternating cold and hot cycles of the engine, long-term immersion in diesel, continuous vibration of the engine compartment, ordinary rubber rings are prone to hardening and expanding, losing elasticity, resulting in failure of the layered sealing and oil leakage. This product strictly controls the dimensional tolerances of the inner and outer diameters and wire diameters, is compatible with the double-layer sealing grooves of the corresponding model injectors, and can replace the entire set of double sealing rings when disassembling the injector, thereby completely eliminating oil leakage and intake pressure leakage faults. It is suitable for large mining excavators, heavy-duty loaders, and long-distance heavy trucks for maintenance and repair of electronically controlled common rail diesel engines.
Core Advantages of the Single Product
Oil-resistant fluorine rubber material, does not swell or harden even after long-term diesel immersion
Both sealing rings are made by molding with special fluorine rubber raw materials for fuel resistance. They can withstand long-term immersion in various types of diesel and engine oil, and will not expand, crack, or harden in wide temperature ranges, maintaining long-term sealing elasticity.
Uniform standard circular cross-section, fits the sealing groove without leakage gaps
Molded as a whole, the cross-section is uniform and fine without core deviation. After being respectively installed into the two sealing grooves of the injector, they completely fill the gap of the body, without compression skewing under high and low pressure conditions, and can block the two-way leakage of fuel and gas in layers.
High compression rebound characteristics, maintaining sealing force even after repeated disassembly
Optimized rubber molecular structure, with high compression rebound rate. Even after repeated squeezing of the injector during disassembly, it will not permanently deform. A single replacement can provide a long-term stable double-layer sealing effect, reducing the cost of frequent replacement of consumables.
Resistant to high temperature and aging, blocking cylinder head high-temperature radiation damage
It can withstand continuous transmission of high temperature from the cylinder head. Long-term alternating cold and hot cycles will not cause rapid aging and failure. It can prevent the combustion chamber from directly burning the rubber body, extending the overall service life of the double-layer sealing components.
Two-color specification differentiation, quick identification of inner and outer layers during maintenance and disassembly
The black and green two-color design distinguishes the assembly positions of the inner and outer layers intuitively. On-site maintenance will not be confused by reversing the assembly, avoiding failure of the seal and oil leakage faults caused by incorrect specification installation.
Durability inspection of the complete set of seals for factory shipment, consistent performance in the same batch
Samples of double-layer sealing rings are randomly selected from each batch for high-pressure pressure retention, high and low temperature cycle durability tests. The performance parameters are consistent, and after replacement, the double-layer oil circuit sealing state of the injector can be quickly restored. List of Accessories
T402743 Double-layer Sealing O-ring Kit (1 black outer sealing ring + 1 green inner sealing ring) Sealing Plastic Bag Set Packaging Applicable scenarios
This product 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 generators. It is applicable for 24-hour continuous heavy-duty operations in mines, long-distance trunk transportation, hot and dusty environments at construction sites, and heavy-duty electric control common rail diesel engines with double-layered compartmentalized sealing for the fuel injector body. This product is designed for the replacement of double-layered sealing consumables in heavy-duty electric control common rail diesel engines operating in such environments.
Product Basic Parameters
Product Name: T402743 Fuel Injector Double-Layer Fluorosilicone Sealing O-Ring Kit
Part Number: T402743
Main Material: Oil-resistant fluorosilicone (black and green colors distinguish specifications)
Structural Feature: Standard circular ring-shaped cross-section, integrated without joint molding, double-layered compartmentalized sealing structure
Application Conditions: High and low-pressure layered fuel sealing for fuel injector, high-temperature and alternating hot and cold conditions of cylinder cover, heavy-duty electric control common rail diesel engine fuel injector double-layer sealing points
Product Status: New complete set of sealing O-rings, factory completed with oil resistance swelling, high and low temperature compression rebound, and high-pressure sealing durability full calibration and testing
Packaging: Transparent sealed plastic bags for individual packaging, isolated from oil and dust, hard tube protection for separate storage to avoid compression deformation, supports single set retail, bulk purchase of entire bag, and is compatible with cross-border small package logistics.
