HB802X-80 Series Stainless Steel Exhaust Safety Valves – Protect Your Chemical Storage Tanks
Chemical liquid storage requires careful pressure management to prevent accidents, maintain operational safety, and protect personnel. The HB802X-80 Series Stainless Steel Exhaust Safety Valves provide reliable solutions for emergency pressure release in chemical tanks, ensuring smooth and safe operations.
These valves are known worldwide under various names: “emergency vent valve” in the US, “tank pressure relief valve” in the UK, “chemical tank safety exhaust valve” in Australia, and “stainless steel overpressure vent” in India. Despite different terminology, their core function is consistent: protect tanks from overpressure, prevent structural damage, and ensure safety during chemical storage.
The HB802X-80 series includes three distinct models tailored to different operational needs:
HB802A-80: A one-way exhaust vent valve with a single pressure disc. When internal tank pressure exceeds the rated release pressure, the valve opens to safely release excess pressure.
HB802B-80: A vacuum pressure vent valve with two discs—one for pressure, one for vacuum. Excess vapor pressure opens the pressure disc, while under-vacuum conditions allows air to enter through the vacuum disc. This dual-disc design ensures tanks remain protected under both overpressure and vacuum situations.
HB802C-80: A one-way exhaust vent valve with an additional bursting disc device. If internal pressure exceeds the burst pressure, the disc ruptures, and the pressure disc opens to release extra pressure. The bursting disc must be replaced after activation. Typically, the bursting pressure is 0.02 MPa higher than the pressure disc opening pressure, offering an extra safety margin.
Technical Advantages:
Materials: Carbon steel, SS304, or SS316 for exceptional corrosion resistance and durability
Nominal Diameter: 3 inches, suitable for a wide range of chemical tanks
Nominal Pressure: 0.6 MPa
Valve Opening Pressure: 0.05 to 0.4 MPa, adjustable to tank specifications
Temperature Range: -20°C to +120°C
Connection Method: Flange for secure and stable installation
Constructed with high-quality stainless steel, the HB802X-80 valves withstand harsh chemical environments, resist corrosion, and maintain reliable operation over long service periods. Regular inspection ensures optimal performance, protecting both the chemical storage and operational personnel.
The HB802X-80 series is ideal for chemical storage tanks, industrial liquid tanks, and processing vessels. By controlling emergency pressure release, these valves help prevent structural damage, reduce risks of chemical leaks, and ensure environmental and operational safety. Choosing HB802X-80 means investing in a globally recognized, high-performance safety solution for chemical tank pressure management.
Key Features:
Stainless Steel Construction: corrosion-resistant and durable for long-term use
Three Model Options: one-way exhaust, vacuum pressure, and bursting disc types
Wide Temperature & Pressure Range: -20°C~+120°C, 0.05–0.4 MPa
Flange Connection: stable, secure installation
Global Applications: chemical storage tanks, industrial liquid storage, processing vessels
Dual Protection Design: overpressure and vacuum relief in one unit (HB802B-80)
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