Pressure Relief Valve & Venting Components

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Ensure Safe and Efficient Oil Tank Operations with HBPV-E Aluminum Alloy External Vent Valves

Ensure Safe and Efficient Oil Tank Operations with HBPV-E Aluminum Alloy External Vent Valves

Maintaining proper pressure in oil tanks is essential for safety, operational efficiency, and environmental protection. The HBPV-E Series External Vacuum Pressure Vent Valves, made from high-strength aluminum alloy, are designed to automatically regulate tank pressure, preventing overpressure or vacuum conditions during fuel filling or discharge. Their corrosion-resistant aluminum construction ensures long-lasting performance even in harsh environments.

Globally, this product is referred to by different names: “spring breather valve” in the US, “oil tank truck vent” in the UK, “external tank pressure relief valve” in Australia, and “oil tanker breather valve” in India. No matter the name, the purpose is the same: protecting oil tanks, trucks, and ships while maintaining fuel safety and integrity.

The HBPV-E series offers multiple configurations to meet diverse installation requirements:
HBPV-E-FA: External vent valve with fire arrestor and flange connection
HBPV-E-02: Flange-connected external vent valve
HBPV-E-03: BSPP or NPT 2-inch female threaded vent valve
HBPV-E-04: BSPP or NPT 1-inch male threaded vent valve

Each valve features an anti-splash device that prevents oil spillage during transportation and operation. Thanks to the aluminum alloy body, these valves are lightweight, highly durable, and corrosion-resistant. Regular maintenance and inspection are recommended to prevent debris from affecting performance.

Ideal for oil tankers, fuel trucks, and marine vessels, the HBPV-E aluminum alloy vent valves maintain stable internal pressure, reduce vapor emissions, and enhance operational safety. Investing in HBPV-E means choosing a reliable, internationally recognized solution for external tank pressure management that combines efficiency, durability, and environmental protection.

Key Features:
Aluminum Alloy Body: lightweight, corrosion-resistant, and durable
Automatic Pressure Regulation: maintains stable internal tank pressure
Anti-Splash Design: prevents fuel spills during operation
Versatile Connections: flange, BSPP, or NPT threaded options
Global Applications: fuel trucks, oil tankers, and marine vessels

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The vacuum pressure vent valve is installed on the top of oil tanks, primarily used to balance the internal and external pressure, ensuring the safety of the tank during operation. It is equipped with an anti-splash device, effectively preventing oil from spilling during transportation, achieving energy-saving and environmental protection. To ensure the long-term normal operation of the vacuum pressure vent valve, regular inspection and maintenance are recommended to prevent debris accumulation from affecting its performance.

HBPV-E-FA External Vent Valve
with Fire Arrestor and Flange Connecting

HBPV-E-FA External Vent Valve
with Fire Arrestor and Flange Connecting

Product Features:
Excellent Sealing: Ensures safe and reliable connection with no leakage.
High-Quality Material: Made of cast aluminum alloy, durable and corrosion-resistant.
Multiple Installation Options: Available in flange and threaded connections, with various thread sizes to meet your needs.
Operating Temperature: -25℃ to 80℃, suitable for a wide range of environments.
Applicable Media: Suitable for water, hydraulic oil, mechanical oil, diesel, emulsified oil, various greases, and chemicals.

HBPV-E-03 External Vent Valve with
BSPP or NPT 2-inch Female Thread

HBPV-E-04 External Vent Valve with
BSPP or NPT 1-inch Male Thread

Product Applications:
The vacuum pressure vent valve, also known as the spring breather valve, oil tank truck breather valve, or vent valve, is an essential component for oil tankers, refueling trucks, and oil ships. It automatically regulates the internal pressure of the tank, maintaining constant pressure during oil input or output, reducing oil vapor leakage, and ensuring the cleanliness and safety of the oil.

About Haibo
Zhejiang Haibo Petroleum Equipment Co., Ltd.

Zhejiang Haibo Petroleum Equipment Co., Ltd., established in 2017, is a certified enterprise located in Yongjia County, Wenzhou City, Zhejiang Province—recognized globally as the world’s largest manufacturing base for petroleum equipment and the well-known hometown of pumps and valves in China.
Our products are widely used in Fluid Control Systems, Energy Systems, Measurement Systems, Piping Systems, and Hydraulic Systems, serving petroleum companies, military units, oil depots, tank truck manufacturers, and petrol stations worldwide. Province—recognized globally as the world’s largest manufacturing base for petroleum equipment and the well-known hometown of pumps and valves in China.
At Haibo, we are backed by a team of senior industry experts with more than 20 years of professional experience in the petroleum equipment and fluid control sectors. Their deep technical knowledge and industry insight ensure that every product and solution we deliver meets the highest standards of quality, reliability, and performance.

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