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Wenzhou Jiahao Petroleum Machinery Co, Ltd

Alice@chinafuelnozzle.com

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  4. 300L Fuel Tank Nozzle automatic Fuel Noz
  • 300L Fuel Tank Nozzle automatic Fuel Nozzle OPW 1290
  • 300L Fuel Tank Nozzle automatic Fuel Nozzle OPW 1290
  • 300L Fuel Tank Nozzle automatic Fuel Nozzle OPW 1290
  • 300L Fuel Tank Nozzle automatic Fuel Nozzle OPW 1290
300L Fuel Tank Nozzle automatic Fuel Nozzle OPW 1290 300L Fuel Tank Nozzle automatic Fuel Nozzle OPW 1290 300L Fuel Tank Nozzle automatic Fuel Nozzle OPW 1290 300L Fuel Tank Nozzle automatic Fuel Nozzle OPW 1290

300L Fuel Tank Nozzle automatic Fuel Nozzle OPW 1290

300L Fuel Tank Nozzle automatic Fuel Nozzle OPW 1290
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Description

300L Fuel Tank Nozzle automatic Fuel nozzle OPW 1290


JH-300 Automatic Tanker Fuel Dispensing Nozzle: Technical Overview

1. Product Overview
The JH-300 is a high-flow, automatic shut-off nozzle designed for bulk fuel transfer in heavy-duty applications such as rail, tanker, and fuel storage tank filling. Its right-angle design enables close fitting to walls and corners, enhancing accessibility in confined spaces. The nozzle operates exclusively on pumped dispensing systems and features a durable die-cast aluminum body with integrated anti-loosening mechanisms to prevent oil leakage during prolonged use.

2. Technical Specifications
Parameter JH-300
Operation Mode Automatic
Min Back-Pressure Required 0.5 Bar / 7.25 PSI
Inlet Connection 2" BSP NPT Female
Swivel Included No (sold separately)
Spout Diameter 42 mm
Max Flow Rate 350 L/min
Material (Wetted Components) Aluminum (body/spout), Stainless Steel (springs/main stem), NBR/Viton (seals)

3. Construction & Working Principle
3.1 Key Components
Air-hole: Facilitates pressure sensing for automatic shut-off.
Sub-valve & Main Valve: Two-stage seal design prevents seal blowout under high pressure.
Diaphragm & Spring: Regulates pressure changes during fuel flow.
Venturi Inlet: Creates a vacuum effect to trigger shut-off.
3.2 Shut-off Mechanism
Startup: Opening the nozzle initiates fuel flow via pressure-driven main valve activation.
Flow Regulation: Reduced flow section increases velocity, lowering pressure and creating a vacuum (meiobar) in the diaphragm chamber.
Shut-off Trigger: When the spout touches the liquid surface, vacuum pressure closes the main valve and resets the mechanism.

4. Installation & Maintenance
Installation:
Tighten hose coupling with a wrench; avoid lubrication.
Use sealant (not Teflon tape) for NPT threads to prevent swivel damage.
Maintenance:
Keep the spout air-hole unblocked to ensure functionality.
Store in a nozzle boot after use to prevent damage.

5. Competitive Advantages vs. OPW 1290
Lightweight Design: Aluminum body reduces weight by 20% compared to steel alternatives.
Right-Angle Ergonomics: Enhances grip and control in tight spaces.
Dual Poppets: Enable nozzle operation under high inlet pressure (up to 50 PSI).
Venturi Shut-off: Ensures precise automatic shutoff without overflow.
6. Applications
Bulk fuel transfer for rail, tanker trucks, and storage tanks.
Suitable for diesel, gasoline, and other petroleum products.
Note: For optimal performance, ensure compatibility with pumped dispensing systems and follow installation guidelines strictly.

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Product Categories

  • Fuel nozzle
  • Fuel pump
  • Flow meter
  • Adblue Equipments
  • LPG dispenser products
  • Submersible Pump
  • Vapor recovery system
  • Fuel Dispenser Accessories
    • Nozzle spares
    • Breakaways
    • Swivels
    • Flexible Pipe
    • Filters
    • Oil sight glass
    • Others
  • Hose Reel
  • Solenoied Valve

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Alice@chinafuelnozzle.com

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