1. All weather protection design: The top of the valve body is equipped with a rainproof cap or protective cover, which can effectively prevent rainwater, dust, and debris from entering the valve, ensuring that the valve works normally 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 sealing surface between the valve disc and the valve seat adopts a flat or conical hard seal (soft sealing ring 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 (304/316) or aluminum alloy, and the valve disc and internal components can be made of stainless steel, polytetrafluoroethylene (PTFE), etc., suitable for different media such as oil and chemical solvents.
5. Optional fire-resistant structure: It can be equipped with a built-in fire-resistant 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. Easy maintenance: The structure is simple, the valve disc component is detachable, making it convenient for regular inspection and cleaning, ensuring respiratory sensitivity.