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15
2022
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06
What is the structure and working principle of stainless steel pressure tanks?
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What is the structure and working principle of stainless steel pressure tanks?
The pressure tank is actually very simple. It has a shell with an inflatable rubber bladder inside. The purified water generated by the water purifier enters the pressure tank, which compresses and expands, generating pressure. As soon as the faucet is opened, the water is squeezed out by this pressure. So, what is the structure and working principle of a stainless steel pressure tank?
What is the structure and working principle of stainless steel pressure tanks?
1. The structure and working principle of pressure tanks are mainly composed of valve covers, inflation ports, airbags, carbon steel tanks, and flanges. When it is connected to the water system, it mainly serves as an accumulator. When the system water pressure is greater than the nitrogen pressure between the carbon steel tank airbags of the expansion tank, the system water will be squeezed into the airbags of the expansion tank under the action of the system pressure, thereby compressing the nitrogen between the airbags, reducing their volume and increasing the pressure. It will increase the overall water capacity of the system, reduce system pressure, stop water inflow, and until the system water pressure reaches a new balance with the nitrogen pressure between the tank and the airbag.
When the system water pressure is less than the gas pressure in the expansion water tank, the water in the airbag will be squeezed out by the nitrogen pressure between the water tank and the airbag, thereby compensating the system. The volume of water in the system will decrease, the pressure will increase, and the volume of nitrogen between the tank and the air bag will increase. The pressure will decrease until a new equilibrium is reached, and the water will stop being squeezed back into the system from the air bag. The pressure tank will play a role in regulating system pressure fluctuations.
Due to the regulating effect of airbags, pressure tanks are widely used for small-scale pressure fluctuation control in water systems. Pressure tanks are used in hot water heating systems to eliminate pressure fluctuations caused by changes in water temperature and avoid damaging other system control components. If applied to variable frequency water supply, it can eliminate pressure fluctuations caused by the start and stop of the water pump, reduce the number of starts of the variable frequency pump, and greatly extend the service life of the water pump. If applied to civil building water supply or other water supply equipment, it can eliminate the water hammer effect caused by the opening and closing of other valves, and protect the entire system from water hammer impact.
What are the types of stainless steel pressure tanks?
Type: Air supply type and diaphragm type.
1. The air in the replenishment pressure tank comes into direct contact with water. After a period of time, the air decreases due to leakage and dissolution in water, gradually reducing the amount of regulated water. The start-up of water pumps is becoming increasingly complex and requires regular air replenishment. The gas supply methods include air compressor, water spray, and timed exhaust.
2. The diaphragm pressure tank separates the gas from the water. The water is inside a rubber (plastic) bag, and the gap between the outside and the water tank is pre filled with inert gas, usually nitrogen. This type of pressure tank has no loss of gas solubility and moisture, and can be inflated in one go for long-term use without the need to install an air compressor. Therefore, it saves investment, simplifies the system, and expands the application scope.
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