Description
Product Overview
The plunger oil outlet valve assembly is installed inside the pump chamber of the high-pressure oil pump. The plunger moves upward to compress the fuel and establish high-pressure oil pressure. The valve head cooperates with the valve seat to achieve one-way closure and locking of the oil path, preventing high-pressure fuel from flowing back and causing pressure relief. Under long-term conditions of thousands of bar of high-pressure fuel erosion, impurities from diesel particles wear, and continuous high-temperature and vibration working conditions of the engine compartment, the sealing surface of the valve head develops scratches, the spring fatigue and elastic force attenuation occur, resulting in fuel leakage, slow pressure generation speed of the oil pump, rapid pressure relief of the oil circuit after engine shutdown, weak climbing power of the equipment, and difficulty in starting at low temperatures. This product has standardized parameters for the inner diameter of the plunger cylinder, the stroke of the valve rod, and the spring elasticity. After disassembling the high-pressure oil pump, the entire set of components can be replaced to repair the oil pressure failure. It is suitable for large mining excavators, heavy-duty loaders, and long-distance heavy-duty freight trucks with diesel engines for high-pressure oil pump maintenance and servicing.
Core Advantages of the Single Product
The entire component is processed from quenched and tempered alloy steel, which is wear-resistant and resistant to high-pressure erosion, and is not prone to deformation.
The valve head, valve rod, and plunger cylinder are all subjected to high-temperature quenching and hardening treatment. The entire sealing surface is mirror-polished, and they can withstand high-pressure fuel continuous erosion without developing scratches or dimensional deformation for a long time. They maintain a micron-level precise sealing gap for a long time and prevent fuel backflow and pressure relief.
The conical guide valve head structure reduces the loss of medium erosion through buffering.
The front conical guide shape disperses the impact force of high-pressure fuel， reduces local wear on the sealing surface， and optimizes the oil flow path to reduce the oil circuit vortex resistance and improve the oil pump pressure generation efficiency.
The thin-diameter integrated mirror valve rod has smooth reciprocating motion without sticking.
The smooth mirror-coated valve rod throughout is finely ground， with a uniform gap between the inner wall of the plunger cylinder and the valve rod， low friction resistance during the up and down reciprocating motion， quick response under high-pressure driving， and elimination of supply lag and uneven cylinder supply jitter.
The high-strength alloy pressure regulating spring has stable elasticity and is not prone to fatigue attenuation.
The matching precision spiral pressure spring is strengthened through heat treatment to enhance elastic performance. Long-term repeated compression and rebound will not cause elastic force attenuation， stabilizing the base oil pressure inside the oil pump and ensuring a stable supply pressure from no-load to heavy-load throughout.
The entire set is processed and ground in a complete set， and the assembly does not require manual matching and adjustment.
Each valve head， valve rod， plunger cylinder， and spring are processed in one-to-one pairing， ensuring high sealing fit. After replacement， it can be directly matched with the oil pump pump chamber， eliminating the need for on-site manual grinding and elasticity adjustment， significantly reducing maintenance time.
Independent high-pressure flow testing for each set before leaving the factory， with consistent performance and stability in the same batch.
Each set of components independently completes high-pressure pressure retention duration， oil supply flow， and spring elasticity tests. The factory performance parameters are consistent， and after replacement， the oil pump's standard boost supply performance can be quickly restored. List of Accessories
NOZZLE-C15 Complete Piston Oil Outlet Valve Assembly (conical guide valve head 1 piece + precision valve stem 1 piece + piston cylinder 1 piece + pressure regulating spring 1 piece) Vacuum Sealed Packaging Applicable scenarios
It is suitable for large-scale mining excavators with high-pressure common rail and mechanical direct injection fuel supply systems, heavy-duty wheeled loaders, long-distance heavy-duty freight trucks, high-power fixed diesel generators. It is applicable for 24-hour continuous heavy-duty operations in mines, long-distance trunk freight transportation, hot and dusty environments at construction sites, and the corrosion of impure diesel on heavy-duty diesel engines. The internal pressure building and maintaining components of the high-pressure oil pump of the diesel engine are replaced.
Product basic parameters
Product name: NOZZLE-C15 High-pressure Oil Pump Piston Outlet Valve Complete Set of Components
Part number: NOZZLE-C15
Main material: Tempered hardened alloy steel (valve head, valve stem, piston sleeve), heat-treated alloy pressure spring
Structural features: Conical guide valve head, thin-diameter mirror-faced precision valve stem, cylindrical piston sleeve, spiral pressure regulating spring complete matching structure
Application conditions: High-pressure fuel boost and single-direction pressure maintaining, engine compartment alternating cold and hot continuous vibration, corrosion of impure diesel on heavy-duty diesel engine high-pressure oil pump core supply component
Product status: New complete set of piston outlet valve components, factory completed with high-pressure sealingity, supply flow rate, and spring elasticity full calibration and testing
Packaging: Independent vacuum-sealed plastic bag packaging, isolated from dust and oil stains, hard tube protection and buffering to avoid transportation knocks and scratches on the mirror-faced sealing working surface, supports single set retail, bulk purchase of the entire bag, and is compatible with cross-border small package logistics.
