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Fuel Injector Nozzle Holders

Name: Fuel Injector Nozzle Holders | Diesel Injector Mounts & Rails - Frigate
Price: 249.00 USD
Availability: InStock

Fuel injector nozzle holders operate under extreme injection pressures, often above 2000 bar in direct injection systems. Their design demands high structural rigidity to resist deformation from cyclic loading and sudden pressure spikes. Precision-machined sealing surfaces are essential to maintain a leak-proof connection between the nozzle holder and injector body.

Material Specification

Stainless Steel (AISI 303, 316), High-Temp Alloy Steel (AISI 4340), or Ceramic-Reinforced Composites

Nozzle Type/Interface Compatibility

Custom adapters for OEM-specific injectors

Fuel Line/Injector Body Connection Type

Threaded (M12x1.5, M14x1.25), Quick-Connect (SAE J2044), or Flanged

Sealing Surface Design & Tolerances

Conical Seat (60°±0.5°), Ra 0.8 µm finish; Flat Seal (±0.02mm flatness)

Overall Dimensions

Compact design (Ø10–25mm x 15–50mm L); CAD-driven (provide 3D model for customization)

Product Description

Any micro-gap formation can lead to fuel leakage, pressure loss, and inconsistent injection timing, negatively impacting combustion efficiency. To combat this, materials with high hardness and tight dimensional tolerances are used, ensuring resistance to cold flow and creep under continuous high-pressure cycles.

Pressure Rating

200–2500 bar (Diesel/GDI); Burst pressure tested to 1.5x max operating pressure

Heat Resistance

-40°C to +300°C (Cyclic thermal shock tested per ISO 18595)

Corrosion Resistance

Passivation (Stainless Steel), PTFE Coating, or Hard Anodizing (Aluminum variants)

Mounting/Clamping Features

Hex flats (8mm–17mm), Torx drive, or Snap-ring grooves (ISO 6194)

Certification Standards

ISO 7876 (Fuel injectors), SAE J2715, RoHS/REACH compliant

Technical Advantages

Thermal gradients generated by combustion processes induce cyclic thermal expansion and contraction in the nozzle holder. Differential expansion rates between the holder and nozzle tip can alter critical clearances, affecting spray pattern geometry. High-performance alloy selection with controlled coefficients of thermal expansion (CTE) mitigates distortion. The manufacturing process includes stress-relief heat treatments and precision grinding to stabilize dimensions. Controlled grain structure in the alloy reduces susceptibility to thermal fatigue cracking under repeated thermal cycling.

Fuel injector nozzle holders are exposed to various fuel chemistries, including biofuels and additives with corrosive elements such as sulfur compounds and water contaminants. The fuel injector nozzle holders must resist pitting and intergranular corrosion that compromise sealing surfaces. Application of advanced surface treatments like nitriding or physical vapor deposition (PVD) coatings enhance hardness and corrosion resistance without altering dimensional tolerances. Passivation techniques and microstructural refinement reduce susceptibility to stress corrosion cracking in the high-pressure fuel environment.

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Industry Applications

Automotive Internal Combustion Engines

Ensures precise fuel metering and spray pattern control for gasoline and diesel engines to optimize combustion efficiency and emissions compliance.

Heavy-Duty Diesel Engines

Maintains structural integrity under high injection pressures for long-haul trucks and construction equipment operating in demanding thermal and mechanical environments.

Aerospace Propulsion Systems

Supports fuel injection components in turbine engines, requiring high thermal stability and vibration resistance to sustain performance during variable flight conditions.

Marine Diesel Engines

Facilitates reliable high-pressure fuel injection in marine propulsion, resisting corrosion from saline environments and continuous operational load cycles.

Agricultural Machinery Engines

Provides durable fuel injection support for engines in tractors and harvesters, designed to withstand dust, vibration, and intermittent heavy-load operation.

Power Generation Equipment

Enables precise fuel delivery in diesel generators, ensuring stable combustion and efficiency under fluctuating electrical load demands and operational hours.

Dimensional Precision and Interface Geometry

Achieving micron-level tolerances on critical diameters and contact surfaces ensures optimal axial and radial alignment between the nozzle holder and fuel injector nozzle holders. Even minimal deviation in concentricity can cause non-uniform fuel spray distribution, leading to incomplete atomization or uneven fuel-air mixing.

Injectors are subject to high-frequency vibrational loads originating from engine combustion events and mechanical drivetrains. The nozzle holder design incorporates fatigue-resistant alloys and optimized cross-sectional geometry to reduce stress concentrations. Finite element analysis (FEA) simulations are used to predict modal frequencies and identify potential resonance points.

Having Doubts? Our FAQ

Check all our Frequently Asked Question

How does Frigate ensure dimensional consistency in Fuel Injector Nozzle Holders across large production runs?

Frigate uses state-of-the-art CNC machining centers combined with automated in-line metrology to pflegen micron-level dimensional tolerances consistently. Statistical process control (SPC) monitors key parameters in real time, allowing immediate correction of any deviation. This approach reduces variability and ensures interchangeability of parts across batches. The result is high repeatability critical for precise injector performance.

What material specifications does Frigate apply to maximize nozzle holder performance under high thermal loads?

Fregatte selects advanced alloy steels with tailored carbon content and heat treatment cycles to optimize hardness and toughness balance. Post-machining stress-relief and cryogenic treatments further enhance thermal fatigue resistance. Metallurgical analysis confirms microstructure stability under repeated thermal cycling. These measures prevent deformation and cracking in high-temperature engine environments.

How does Frigate’s surface treatment process improve nozzle holder corrosion resistance?

Frigate applies nitriding or PVD coatings to increase surface hardness and create a chemically inert barrier against fuel contaminants. The coatings are applied with controlled thickness to avoid altering critical dimensions. Corrosion testing under simulated fuel environments validates coating performance. This ensures long-term durability even with aggressive fuel blends.

In what ways does Frigate optimize nozzle holder design to reduce vibration-induced mechanical failure?

Finite element analysis (FEA) models vibrational modes and stress distribution under engine conditions, guiding structural improvements. Frigate adjusts wall thickness and adds fillets to minimize stress concentration points. High-cycle fatigue testing replicates real-world vibration loads to validate design robustness. This systematic approach extends nozzle holder service life and reliability.

How does Frigate ensure compatibility of nozzle holders with diverse OEM injector systems?

Frigate rigorously adheres to OEM dimensional standards and thread specifications during design and production. Custom tooling and inspection protocols verify conformity for each injector model variant. Close collaboration with OEM engineering teams ensures interface compatibility. This precision engineering enables seamless integration and consistent performance across multiple engine platforms.

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