Product Overview

The XBD‑S series single‑stage, double‑suction, split‑case fire pump units are manufactured by our company in response to market demand, based on the introduction of advanced German technology. By employing both original and modified impellers, along with various impeller cut‑down options, this pump line offers a comprehensive and broad performance range, high operational efficiency, and the ability to deliver any flow‑head operating point that precisely meets the user’s requirements within its specified performance envelope.

The XBD‑S fire pump incorporates the most advanced hydraulic design currently available, both domestically and internationally, for self‑balancing axial and radial forces. It delivers stable performance, high efficiency, a compact structure, low vibration, high pressure resistance, and convenient installation and maintenance.

Product Usage

The XBD‑S series fire pumps are widely used in municipal waterworks, irrigation and drainage pumping stations, power plants, chilled‑water circulation systems, industrial water supply systems, fire‑protection systems, and the marine industry; they are also suitable for general‑purpose applications in the petroleum refining industry.

Performance range

Pump outlet diameter: DN100–300

Pump flow range: Q ≤ 450 L/s

Pump pressure range: H ≤ 2.0 MPa

Pump operating pressure: P ≤ 2.5 MPa

Pump operating temperature: T ≤ 105°C

Pump operating voltage: U = 380 V, 6 kV, 10 kV

Model Description

XBD6.5/70-100S-260A

XBD-Fire Pump Unit

6.5 - Pressure (1/10 MPa)

70-Flow rate (L/s)

100—Pump discharge outlet diameter (mm)

S-volute double-suction type

260—Impeller nominal diameter (mm)

A—Impeller after the first cutting

Hydraulic performance

By leveraging advanced international computer-aided design software and employing modern design methodologies—namely, optimization and reliability-based design—the hydraulic and structural designs of the pump have been refined. As a result, the XBD‑S series fire pumps exhibit exceptionally high efficiency and outstanding cavitation resistance. Compared with similar domestic products, this series achieves an efficiency improvement of 2 to 4 percentage points, while also demonstrating markedly enhanced cavitation performance, thereby enabling substantial cost savings for users.

Structural Performance

1) Compact structure, small footprint, and significant axial compression.

2) Low vibration and low noise; the following measures are primarily adopted to reduce vibration and lower noise:

A. The pump casing adopts a double volute structure;

B. The rotor assembly has a short axial dimension and excellent rigidity;

C. The pump shaft is supported by imported high-precision bearings.

Sealing performance

Excellent sealing performance; the mechanical seal’s friction pair is made of graphite against tungsten carbide, or the packing seal provides a drip‑tight seal, ensuring a long service life.

Working conditions

The XBD‑S type volute‑type double‑suction fire pump system has a maximum operating pressure of 2.5 MPa, meaning that the pump suction inlet pressure plus the pump head does not exceed 2.5 MPa; the pump’s hydrostatic test pressure is 3.75 MPa.

Depending on the maximum pressure the pump body is subjected to, the pump body and cover may be made of gray cast iron (1.6 MPa), ductile cast iron (2.0 MPa), or cast steel (2.5 MPa). Please specify the pump’s pressure rating or material when placing your order.

This series of pumps is designed to convey clear water or other liquids with physicochemical properties similar to those of clear water, at temperatures not exceeding 105°C.

Wenzhou

Structural Description

1) The XBD‑S series fire pumps feature a horizontal split‑case design, with both the suction and discharge ports located below the pump shaft centerline and oriented horizontally perpendicular to the shaft. This configuration allows for convenient maintenance without dismantling the inlet and outlet piping, making assembly, disassembly, and servicing exceptionally easy. The rotor is an integral assembled unit that can be lifted as a whole for simplified maintenance, and the same rotor component can also be used in reverse rotation.

2) Both ends are fitted with high-precision imported deep-groove ball bearings, ensuring smooth operation, low noise, and long service life, with grease lubrication.

3) The shaft seal may be either a mechanical seal or a packing seal, with the user free to select the preferred type.