Size of water replenishment unit

The water replenishment unit starts the water pump to fill the building pipeline network and the pressure water tank water chamber with water. As water is an incompressible liquid, the volume of the water chamber continues to expand as the water volume increases. The bladder shaped diaphragm continuously expands outward, squeezing the air chamber and causing its volume to continuously decrease. The pressure inside the tank also increases continuously. When the design maximum pressure P2 is reached, the pressure switch touches the contact, and the water replenishment unit automatically stops the pump. During the automatic shutdown of the water pump, due to the expansion force of the compressed nitrogen gas in the air chamber, the bag shaped diaphragm is squeezed, which creates a certain pressure on the water in the water chamber and pipeline network, ensuring normal supply of water to users.