1. All weather protection design: The top of the valve body is equipped with a rainproof cap, effectively preventing rainwater, dust, and debris from entering the valve, ensuring normal operation in adverse weather conditions.
2. Dual valve disc independent action: The positive pressure valve disc and negative pressure valve disc are independently adjusted without interference, achieving precise control of constant pressure discharge and constant pressure suction.
3. Constant pressure opening and closing, reliable sealing: The valve disc and seat adopt flat or conical hard sealing (soft sealing rings can be added), and the opening pressure and reseating pressure are stable, with no leakage when closing.
4. Diverse materials and corrosion resistance: The valve body can be made of cast steel, stainless steel, or aluminum alloy, and the valve disc and internal components can be made of stainless steel or PTFE, suitable for different media such as oil and chemical solvents.
5. Optional flame retardant structure: It can be equipped with a built-in flame retardant layer (corrugated board or metal wire mesh) to prevent external flames from entering the tank, meeting the fire prevention requirements of petrochemical storage tanks.
6. High ventilation volume and low pressure drop: Optimized flow channel design, low respiratory resistance, strong ventilation capacity, ensuring stable pressure during rapid fluid inflow and outflow.
7. Easy maintenance: The structure is simple, the valve disc component is detachable, making it convenient for regular inspection and cleaning, ensuring respiratory sensitivity.