First, the product overview XBD (HL), XBD (HW) series of vertical horizontal pump for constant pressure fire pump is developed according to market needs for high-rise building fire water supply of new products, reliable, high-quality fire-specific Pump. Its performance, technical conditions in line with national standards GB6245-1998 "fire pump performance requirements and test methods" standard requirements. XBD (HW), XBD (HW) fire pump Second, the product characteristics 1, the flow regulator: pump from zero flow to the required maximum flow range changes, the head changes in the range of 5%, and the small flow or zero Flow does not overpressure, thus avoiding the ordinary centrifugal pump in the fire scene when the small flow overpressure and large flow when the water is not on the phenomenon. 2, Energy-efficient: CFD CFD is used to analyze and calculate the relationship between pressure distribution and velocity distribution in the pump, optimize the design of the pump's runner, and ensure that the pump has an efficient hydraulic shape line to improve the efficiency of the pump. Pump body, pump cover, impeller and other over-current parts using resin sand mold model, to ensure the appearance and size of the flow channel and pump hydraulic efficiency. 3, smooth operation, safe and reliable: direct connection between the motor and the pump, simplifying the intermediate transmission structure and enhance the smooth operation, so that the unit running smoothly, safe and reliable. 4, stainless steel sleeve: shaft sealing position is relatively easy to rust, direct-coupled pump shaft once corroded, easy to cause mechanical seal failure. XBD (HL) and XBD (HW) pumps are fitted with stainless steel bushings to prevent rusting, improve shaft life and reduce operation and maintenance costs. 5, user-friendly, investment province: As the pump and motor coaxial, simplifying the intermediate transmission structure, infrastructure investment 20% less than the ordinary pump. XBD (HW) fire pump Third, the working conditions Speed: 1500/3000min (motor synchronous speed) Medium temperature: ≤ +80 ℃ (water) Flow range: 5-80L / s Head range: 0.3 ~ 2.0MPa System maximum working pressure ≤ 3.0Mpa