The HX5/HXF5 tank flame arrestor single breather valve is a one-way pressure-relief flame arrestor breather valve installed on the top of fixed roof tanks, allowing tank gas to vent outward only when overpressure occurs, while remaining tightly closed when the tank pressure is below the set value. The valve features a built-in stainless steel corrugated plate flame arrestor core to effectively prevent external flame ingress, and is equipped with standard flange connections for piping to a recovery system or direct atmospheric discharge. Its core purpose is to automatically release excess gas during tank filling or temperature rise to prevent overpressure deformation, while blocking flame propagation. It is suitable for tanks already equipped with independent gas intake devices (such as nitrogen blanketing systems) or where air ingress is not permitted.

HX5 and HXF5 flame arrester single exhalation valves for storage tanks product diagram

1. One-way relief function: Only the pressure disc operates, automatically opening during overpressure without vacuum intake; suitable for tanks with separate gas supply systems.

2. Built-in flame arrestor: Stainless steel corrugated plate flame arrestor core effectively blocks external flame propagation, meeting petrochemical tank fire protection standards.

3. Set-pressure operation with reliable sealing: Flat or tapered hard seal provides stable opening pressure and zero leakage when closed.

4. Large venting capacity with low pressure drop: Optimized flow path ensures low breathing resistance, meeting venting demands during rapid tank filling.

5. All-weather protection structure: Rain and dust cover with internal drainage prevents water accumulation, suitable for harsh outdoor environments.

6. Corrosion-resistant materials: Body available in aluminum alloy, cast steel, or stainless steel; disc and flame arrestor core in stainless steel for various corrosive media.

7. Flexible connection options: Standard flange connections allow horizontal or vertical installation, facilitating connection to recovery piping or atmosphere.

8. Easy maintenance: Removable disc assembly; flame arrestor core can be extracted for cleaning, facilitating periodic inspection and maintenance.

Structural diagram of HX5 and HXF5 flame arrester single exhalation valves for storage tanks

Drawing of Parts

Ventilation meter

Operating pressure

HX5 type single call valve DN50-250      HXF5 type flame retardant single call valve DN50-500

Outline dimension table

Due to the rapid R&D iteration speed of valve products from China kaiweixi Valve Group Co., Ltd., the above technical parameters and specification documents, including product overview, features, parts materials, outline dimension charts, CAD drawings, and product instruction manuals, are for your reference only. For actual applications, please contact our valve sales engineers to obtain the support you need for free. Thank you!