1. Double-nozzle design: Two independent connections for vent gas discharge and intake gas supply, facilitating connection to external recovery and blanketing systems.
2. Two-way breathing function: Pressure disc and vacuum disc operate independently, providing both overpressure relief and vacuum intake protection.
3. Built-in flame arrestor: Stainless steel corrugated plate flame arrestor core effectively blocks external flame propagation, meeting petrochemical tank fire protection standards.
4. Set-pressure operation with reliable sealing: Flat or tapered hard seal ensures stable opening pressure and zero leakage when closed.
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; discs and flame arrestor core in stainless steel for various corrosive media.
7. Large ventilation capacity with low pressure drop: Optimized flow path provides low breathing resistance for both venting and gas intake during rapid tank filling or discharging.
8. Easy maintenance: Removable flame arrestor core for cleaning; simple disc assembly disassembly for periodic inspection and maintenance.