In the development process of intelligent buildings, pressure calibration pumps have a wide range of applications in multiple systems and play an important role in improving the comfort, safety, and energy efficiency of buildings. In the heating, ventilation, and air conditioning (HVAC) system, the pressure calibration pump can be used to calibrate the pressure sensors and controllers in air handling units, fan coil units, and other equipment. Accurate pressure measurement and control can ensure that the air conditioning system reasonably adjusts the air supply volume and cooling and heating power according to indoor and outdoor temperature, humidity, and other conditions, providing a comfortable temperature and air quality environment for indoor personnel while avoiding energy waste. In the water supply and drainage system, the pressure calibration pump calibrates the pump outlet pressure, pipeline pressure, etc., ensuring smooth water flow and stable pressure, preventing problems such as pipeline rupture due to excessive pressure or insufficient water supply due to low pressure, and guaranteeing the normal water demand of the building. In addition, in the fire protection system of intelligent buildings, the pressure calibration pump is used to calibrate the pressure output of fire pumps and the pressure monitoring devices in fire pipelines, ensuring that the fire protection system can quickly and effectively provide fire-fighting water with sufficient pressure in the event of a fire, improving the fire safety level of the building, providing a solid guarantee for people's lives and property safety, and promoting the development of intelligent buildings towards more intelligent, efficient, and safe directions.