Product Overview of the XBD-HW (HL) Constant-Pressure Tangential Fire Pump

The XBD series constant-pressure fire pumps are newly developed by our company in response to market demand, incorporating advanced technologies and integrating the strengths of similar domestic and international products. They are ideally suited for fire‑fighting water supply and domestic water supply in high-rise buildings, offering reliable, high‑quality performance specifically tailored for firefighting applications. Their performance and technical specifications comply with the national standard GB 6245‑1998, “Performance Requirements and Test Methods for Fire Pumps.” The XBD series constant-pressure fire pumps, also known as tangential‑flow pumps, feature variable flow with stable pressure: across the entire flow range, the head remains relatively constant, with variations within 5%. Moreover, they prevent overpressure at low or zero flow rates, thereby eliminating the common issue of conventional centrifugal pumps—overpressurizing at low flow while failing to deliver sufficient flow at higher rates. This design significantly enhances firefighting efficiency and improves the safety and reliability of firefighting equipment and personnel.

Based on the inherent characteristics of fire pumps and our company’s specific circumstances, constant-pressure fire pumps rated at 75 kW or below (including 75 kW) are available in both horizontal and vertical configurations, while those above 75 kW are offered exclusively in a horizontal design. The entire product line features Y‑type directly coupled motors with extended shafts, resulting in a compact, aesthetically pleasing, and space‑efficient pump design. Reliable mechanical seals further enhance the overall reliability of the pump unit. All impellers are open‑type, generating minimal axial thrust and eliminating wear rings, thereby preventing corrosion‑induced seizing. Consequently, the complete pump system operates smoothly, produces low noise, boasts an extended service life, and is easy to install, operate, and maintain.

The pump body and pump cover are made of cast iron, while the impeller is manufactured from ductile cast iron or bronze, depending on customer requirements.

Main applications of the XBD-HW (HL) constant-pressure centrifugal fire pump

The XBD series constant-pressure fire pumps are primarily designed for water supply in fixed fire‑fighting systems of industrial and civil buildings, including hydrant‑based extinguishing systems, automatic sprinkler systems, and mist‑type fire‑extinguishing systems. They can also be used in combined fire‑fighting and domestic (or production) water‑supply systems, as well as in a variety of applications such as building, municipal, industrial and mining, and boiler water‑supply systems.

Operating Conditions for XBD-HW (HL) Constant-Pressure Tangential Fire Pump

Rotational speed: 2900 r/min (motor synchronous speed)

Medium temperature: Ambient-temperature clear water

Flow range: 0–80 L/s

Head range: 30–260 m

Motor power: 15–160 kW

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Meaning of the XBD-HW (HL) Constant-Pressure Tangential Fire Pump Model Designation

XBD3/5-HW(HL)

XBD – Fire Pump Unit Code

3-Pressure (1/10 MPa)

5-Flow rate (L/s)

HW – The structure is a horizontal pump.

The HL structure is a vertical pump.