Fire automatic constant pressure water supply equipment to automate the measurement instruments constitute the main control unit, the water supply system for the automatic control mode by setting the constant pressure water supply equipment. Features: 1, the device is advanced technology, reasonable design, reliable operation, the water pressure is stable, no noise, no secondary pollution. 2, the whole machine is compact structure, small size, light weight, small footprint, low investment, quick to install, easy to maintain, easy centralized management. 3, the high degree of automation, protection function, with phase, undervoltage, overvoltage, overcurrent, overheating, short circuit, stall protection. Pump by programmable controller, switching accurate, by one soft start to reduce the impact on the grid, because the pump is running at high efficiency conditions, significant energy saving effect. 4, with both manual and automatic operation, in any case continue to water supply system. 5, the device has a fire control center and the central computer control center network control functions, and with dual power supply and standby pump automatically put into operation function, but also have periodic inspection and manual timing automatic inspection function at any time. Scope: Fire automatic constant pressure water supply equipment with advanced technology, reasonable design, reliable operation, the pressure is stable, easy to install, widely used in various high-rise buildings, industrial enterprises, residential quarters and other types of fire water system. How it works: After the device into operation, when there is a fire, the pipeline pressure drop to the fire main pump start pressure point, the main pump starts automatically if the main pump still does not meet the fire water, the pipeline pressure will continue to fall standby pump starts when the pressure dropped to the point, the standby pump starts immediately put into operation.