First, use one for production and living pressurized water system, commonly known as bladder automatic water supply system. 2, for the heating, air conditioning system as a regulator replenishment expansion device, commonly known as bladder floor-expansion tank. Second, the principle of the product is to use the gas tank can shrink resistance, to regulate the amount of water, and its role is equivalent to the high water tank, water tower. High pressure water storage systems, the release of water pressure is low, and according to changes in pressure, pump start and stop control in order to achieve a continuous water supply purposes, can play a role in the amount of expansion of the containment system when used as an expansion tank. Third, the product features 1, once inflated can ensure long-term use; 2 cans of gas and water does not touch the body, to ensure water quality from pollution, and does not corrode the tank; 3, can eliminate water hammer in the pipe network and noise. Fourth, the use of 1, the device uses the platform base, equipment and infrastructure available with embedded steel welding or expansion bolt; 2, using the temperature 5 ~ 95 ℃, ambient temperature 5 ~ 45 ℃; 3, the device is running, the pump should be specification requirements for maintenance; 4, following the pump for reference, the user can also choose other types of pumps. Five, indicating that the pump models are generally based on the actual needs of the designer selection, but also by the company to select the design condition. Equipment is generally configured for a jar of two pumps, a pump can also be configured jar, a can of three pumps, two cans of two pumps, etc. as needed. This device is equipped with a control cabinet factory, pressure controller, water pump outlet valve, the base pipe group, exhaust valve.