Fiberglass nitrogen sealed water tanks are generally used in ultrapure water systems. When a buffer tank is required after a mixed bed or EDI deionization equipment, it is often preferred to use a fiberglass nitrogen sealed water tank as the buffer tank.

How can ultrapure water be polluted in the air: It is well known that the air contains impurities such as carbon dioxide, bacteria, and dust, and ultrapure water is a pure solvent with strong solubility for these impurities. Therefore, once ultrapure water comes into contact with air, its electrical resistivity will rapidly decrease. Practice has shown that ultrapure water with a resistivity of 15M Ω· cm or more will drop to 3-4M Ω· cm after being exposed to air for 1 minute, and will drop to around 2M Ω· cm after 3 minutes. Therefore, it is necessary to reduce the chance of contact between ultrapure water and air.

Common methods to prevent air pollution of ultrapure water containers:

☆ Nitrogen filling method: that is, filling nitrogen gas on the water surface of the water tank to maintain an appropriate positive pressure inside the tank, preventing the atmosphere from contacting the water surface inside the tank.

☆ Film bag method: a bag shaped film is placed inside the water tank to cover the water surface. The film bag rises and falls with the water level, reducing the contact area between the water surface and the air.

Floating roof method: A lightweight material with a density lighter than water is used to make a whole plate-shaped floating roof in the water tank and float it on the water surface. The gap between the floating roof and the box is covered with lightweight elastic materials (such as sponge, foam plastic, etc.), and the floating roof rises and falls with the water surface. Thereby reducing the chance of contact between air and water surface.

Among the above three methods, fiberglass nitrogen sealed water tanks are common, easy to implement, and effective. Nitrogen sealed devices are mainly used for constant control of nitrogen pressure at the top of storage tanks? To protect the materials inside the tank from nitriding and ensure the safety of the storage tank. Nitrogen sealing

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The device consists of two main parts: a quick release valve and a micro pressure regulating valve. The quick release valve consists of a pressure controller and a single seat shut-off valve.

When the pressure inside the storage tank rises to the set pressure, the quick release valve quickly opens to release excess pressure inside the tank. When the pressure inside the storage tank decreases, the micro pressure regulating valve opens and fills the tank with nitrogen gas. As the micro pressure regulating valve must be used at a pressure below 0.1Mpa, and the on-site pressure is high, a pressure regulating valve must be installed to reduce the pressure to below 0.1Mpa before it can be used. Nominal pressure 0.1Mpa? The pressure can be set in sections, ranging from 0.5Kpa to below 66Kpa, with a medium temperature of ≤ 80 ℃.

Fiberglass nitrogen sealed water tank requires less investment, has good effect, and most importantly, has low operating costs and is pure water,

It can protect our health. Let us all be as fresh and comfortable as the morning air.