High-Flow Pneumatic Bottom Valve with Dual Round Flanges for Fuel Tank Trucks
The HBFV-B-4 is a carefully engineered pneumatic bottom valve designed for safe and efficient fuel handling in tank trucks. Installed directly at the tank’s base, the valve features a cutting groove that protects the tank’s integrity during accidental impacts. When subjected to extreme forces, the outer section of the valve body fractures along the groove, maintaining overall tank sealing and preventing fuel leaks. This safety-focused design ensures that fuel unloading operations remain secure and reliable under demanding conditions.
Built from high-strength die-cast aluminum, the valve combines durability with lightweight performance, making it easier to handle during installation and maintenance. Its high-lift poppet design ensures maximum flow rates, supporting rapid loading and unloading of gasoline, diesel, and other light fuels. Stainless steel internal components resist corrosion, and Viton seals provide excellent chemical compatibility, extending service life even in harsh operating environments. The valve’s self-centering plunger and heavy-duty compression spring guarantee consistent closure, while optional mechanical push rod or eye bolt adapters allow flexibility in vent or top operation.
Globally, this type of valve is recognized under various names, reflecting regional terminology and industrial practices. Some common alternatives include Fuel Tank Truck Bottom Valve, Emergency Shutoff Valve, Dual-Flange Pneumatic Valve, Petrol Tank Underbody Valve, Tank Base Pneumatic Valve, High-Flow Truck Loading Valve, and Safety Cut-Off Valve for Tankers. Despite differences in naming, the core functionality remains universal: secure, high-capacity fuel transfer with safety and environmental protection in mind.
Key Features:
High-flow capability for efficient fuel operations
Compatible with standard 4-inch TTMA sump connections
Compliant with DOT 49 CFR 178.345-8, DOT 406, EN 13308:2002, and TTMA RP84-92 & RP86-92 standards
Die-cast aluminum body for strength and lightness
Viton seals and stainless steel internals for chemical resistance and longevity
Smooth operation via brass cam with bearing boot
Double O-ring camshaft sealing for enhanced leak prevention and maintenance simplicity
Optional mechanical push rod or eye bolt for versatile control
Technical Specifications:
Nominal size: 4 inches
Working pressure: 0.6 MPa
Maximum flow rate: 2500 L/min
Temperature range: -20°C to +70°C
Flange: Round on tank side and pipe side
Opening mode: Pneumatic
Compatible with light fuels such as gasoline and diesel
Recommended Accessories:
Tank Side Flange (HBBVTSFL-100R) with 8 bolt holes
Tank Side Welding Sump with male (HBBVTSFL-100RB) or female nuts (HBBVTSFL-100RA)
Pipe Side Round Flange (HBBVPSFL-100F) with 8 bolt holes
Buna-N / Viton round gaskets for both tank and pipe sides
This series offers a complete solution for fuel tank trucks, chemical trailers, and other liquid transport vehicles, providing a reliable, high-performance connection between tank base valves and pipe systems. Custom materials and sizes can be accommodated to meet different regional standards or specific project requirements.
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