Shanghai Tang Gong specializes in manufacturing practical PVC breathing valves and PVC flange breathing valves

.1 Parameters and functions of breathing valves and polypropylene breathing valves
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. Breathing valves are mainly used in normal-pressure and low-pressure storage tanks containing certain volatile chemical substances that are not allowed to leak out ( Such as /3 storage tank), which is fixed on the top of the storage tank and serves as a ventilation device to ensure that the pressure inside the tank is in a normal state, prevent positive and negative pressure from being generated in the tank and cause damage to the storage tank, and also reduce the risk of damage to the tank. Evaporation loss of liquid in the tank.
., suitable for various petroleum, chemicals, pharmaceuticals, energy, special liquids or gases and other materials.
. 2. Operating pressure and ambient temperature of the breathing valve
, - /+(+)
. B. - /+ (+ )
. , - /+ ( + )
. , - /+ (+ (The operating pressure index can also be specified by the user)
Operating environment temperature: ℃ ~ ℃, working medium: gasoline, kerosene, diesel, aromatic hydrocarbons, sulfur, air, etc. , or other petrochemical materials, the fire retardant category is selected, and the selection or B level is specified by the user.
. Three advantages and scope of use of plastic breathing valves
. Plastic breathing valves are corrosion-resistant and high-temperature resistant , light weight, non-toxic, non-polluting, high mechanical strength, no leakage, sensitive operation, easy replacement of parts, low price and other advantages, it can be widely used in petroleum, chemical, chlor-alkali, smelting, pharmaceutical, electroplating and other industries
. 4. The working principle and basic structure diagram of the plastic breathing valve
.. The working principle of the plastic breathing valve is to use a spring limit valve plate, which is determined by positive and negative pressure to exhale or inhale. The breathing valve should have a leakage It has two functions of releasing positive pressure and negative pressure. Specifically: when the container is under positive pressure, the breathing valve opens to exhale the gas and release the positive pressure. When the container is under negative pressure, the fire-retardant breathing valve opens to inhale the gas and release the negative pressure. This ensures The pressure is within a certain range to ensure the safety of the container.
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