Pressure tank is used in closed water circulation system to balance water quantity and pressure, avoiding frequent opening of safety valve and frequent replenishment of automatic water replenishment valve. The expansion water tank can not only contain the expanded water, but also replenish the water tank. The expansion tank can be filled with air to obtain a larger volume to contain the expanded water. High-pressure and low-pressure expansion tanks can make use of their respective pressures to supplement water to the pressure stabilizing system in parallel. Each point of the device is controlled by interlocking reaction, and it runs automatically, with small pressure fluctuation range, safety, reliability, energy saving and good economic effect.
There is no need to build a water tower, so the investment is small and the area is small. Automatic water and gas regulation, automatic operation, energy saving and automatic grid connection with tap water can still supply water after power failure, and there is no need for supervision for several years after commissioning. Compared with the construction of water tower, it saves 70% investment and 60% investment compared with the existing high-level water tank, which greatly saves civil engineering investment.
Widely used in enterprises, residential areas and rural production, living and office water. 20-2,000 water supply households. Daily water supply is 20-50000m? The water supply height is 150m, and it is a 50-story building. Pressure tank uses the compressibility of air in the tank to adjust and store water and maintain the required pressure, so it is also called pneumatic water supply equipment, which is equivalent to water tower and high-level pool.
Because its water supply pressure is maintained by compressed air in the water tank, the installation height of the water tank can be unlimited. In addition, the equipment has the advantages of low investment, fast construction speed, easy dismantling, great flexibility and high degree of automation, and is very suitable for water supply in small and medium-sized villages with sufficient water resources and normal power supply. However, it has the advantages of small water regulation, fast pressure attenuation, frequent start-up of pumps and high operating cost, and is not suitable for users who require large water consumption and stable pressure.
Pressure tank is generally installed between water distribution pump and pipe network. After the water pump is started, it supplies water to the pipe network, and the excess water is stored in the water tank, so that the water level in the water tank rises, the air in the water tank is compressed, and the pressure increases accordingly. When the pressure in the tank reaches the specified upper limit pressure value, the indicator of the electric contact pressure gauge communicated with the tank top through the pipeline connects the upper limit contact, and sends a signal to cut off the power supply and stop the pump. Users continue to use water, and the compressed air in the tank pushes the water pressure in the tank into the pipe network, and the water level drops, so does the air pressure in the tank.
When it drops to the required lower limit pressure value, the indication of the electric contact pressure gauge is that the lower limit contact is connected, the relay acts, the motor is connected to the power supply, and the water pump is restarted. Under normal circumstances, the water pump can work uncontrollably, and the start-stop times and working time of the pump can be adjusted according to the change of water consumption to ensure continuous water supply to the pipe network.