Nowadays, ships have become a more popular means of transportation, and overseas trade is also popular, which promotes communication and trade between navigation and economic development. In recent years, ships have developed rapidly, and related supporting facilities have also been developed. For example, a pressure water tank is one of the important water tanks, which is very helpful for the water supply on board.

The production and application of pressure water tanks make the water supply system on board no longer a problem. A pressure water tank is a water supply system that provides drinking water, washing water, cleaning water for flushing, and external water on board the ship.

A pressure water tank is a closed container. When the water supply of the pump exceeds the water consumption, excess water enters the water tank. The rising water level compresses the air in the upper space, and the water pressure in the entire water supply pipeline gradually increases. When the pressure reaches (30-40) x104pa, it acts on the pressure relay through the pressure tube, cutting off the motor power and stopping the water pump. As water is consumed, the water level in the pressure tank decreases. When the pressure drops to (15-20) x104pa, the pressure relay is reconnected to the circuit, the motor starts working, and the water pump starts supplying water again.

The application of pressure water tanks not only solves the water problem on ships, but also saves electricity. The pressure water tank water supply equipment is lightweight and occupies a small area. It can be set at any low position and can be automatically controlled. It can save energy and reduce emissions. It has become an important equipment used in modern small and medium-sized passenger and cargo ships