HBPV-BI & ALPV-BI Series Built-in Vent Valves — Intelligent Pressure Regulation for Tank Truck Manholes

HBPV-BI & ALPV-BI Series Built-in Vent Valves — Intelligent Pressure Regulation for Tank Truck Manholes

The HBPV-BI and ALPV-BI series are built-in vent valves specially designed to be installed on the inner side of tank truck manhole covers. They automatically regulate tank pressure whenever there is a difference between the inside and outside of the tank, ensuring safe and reliable operation during transportation. Globally, these valves are known by various names: in Germany as “Einbau-Druckausgleichsventil für Tankdeckel”, in France as “Soupape de ventilation intégrée pour trappe de réservoir”, in Italy as “Valvola di sfiato incorporata per coperchio serbatoio”, in Spain as “Válvula de ventilación incorporada para tapa de registro”, in the Netherlands as “Ingebouwde ontlastingsklep voor tankluik”, and in the UK as “Built-in Tank Manhole Vent Valve”. In Asia and South America, they are commonly referred to as “built-in manhole vent valve,” “safety breather valve,” or “pressure-balancing vent valve.” Despite the differences in terminology, their core function remains the same: maintaining safe tank pressure during transport, preventing fuel leakage, and enhancing overall tank truck safety.

Functions & Features
Automatic Pressure Balancing: When internal tank pressure exceeds external pressure, the valve automatically releases vapor; when internal pressure is lower than external pressure, it intakes air to maintain balance. The HBPV-BI series operates at 6–12 kPa positive pressure and -2 to -4 kPa negative pressure, while the ALPV-BI series operates at 6–8 kPa positive pressure and -2 to -3 kPa negative pressure. Both series function reliably in a temperature range of -20°C to +50°C.
Anti-Spill Protection: In case of unexpected tilting or impact, the built-in anti-spill valve immediately seals the channel to prevent fuel leakage.
Durable Construction: Made from cast aluminum alloy, the valves are robust and corrosion-resistant for long-term service.
Optimized Design: The assembly includes a valve body, valve disc, stem, anti-spill cap, and spring, with customizable opening pressures based on client requirements.
Flexible Installation: Both series can be installed on various tank truck manhole covers, allowing tailored pressure regulation for different tank types and operational needs.

Applications
Top manhole covers for petroleum transport tank trucks
Pressure regulation and safety for chemical tankers
Ventilation and pressure balance for water tank trucks
Safe liquid transport under extreme temperature conditions

The HBPV-BI and ALPV-BI series built-in vent valves provide automatic pressure regulation, anti-spill protection, and corrosion-resistant cast aluminum construction. They are trusted worldwide as essential safety components for transporting hazardous liquids in tank trucks.