The QZF-89 all-weather fireproof and explosion-proof breather valve is a safety protection device installed on the top of fixed roof tanks containing flammable and explosive liquids, integrating pressure/vacuum automatic regulation, flame arrestor, and explosion-proof functions. When the tank pressure exceeds the set value, the pressure disc opens to release excess gas; when the tank vacuum reaches the set value, the vacuum disc opens to admit air; the built-in flame arrestor layer effectively prevents external flames from entering the tank, stopping fire spread. This valve is primarily used for breathing protection of flammable and explosive liquid storage tanks (such as gasoline, benzene, alcohols, etc.) in petroleum, chemical and other industries. Its core purpose is to automatically balance tank pressure while providing fire and explosion protection, ensuring safe tank operation and compliance with environmental and fire safety regulations.

QZF-89 all-weather fire and explosion proof breathing valve product diagram

1. Integrated fireproof and explosion-proof design: Combines breather valve and flame arrestor functions with built-in stainless steel corrugated plate flame arrestor layer to effectively block flame propagation.

2. Independent dual disc operation: Pressure disc and vacuum disc operate independently for precise set-pressure relief and set-vacuum intake control.

3. Reliable sealing with set pressure operation: Disc and seat adopt hard seal or composite soft-hard seal, with stable opening and reseating pressures and zero leakage when closed.

4. All-weather protection structure: Rain and dust cover on top with internal drain slots prevent water accumulation, suitable for harsh outdoor environments.

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

6. Large ventilation capacity with low pressure drop: Optimized flow path ensures low breathing resistance and stable tank pressure during rapid filling or discharging.

7. Easy maintenance: Removable flame arrestor core for cleaning, simple disc assembly disassembly for periodic inspection.

Structural diagram of QZF-89 all-weather fire and explosion proof breathing valve

Drawing of Parts

Performance Specification Table

Outline drawing of QZF-89 all-weather fire and explosion proof breathing valve

Outline dimension table