Horizontal double-casing multi-stage barrel-type pump (BB5)

Parameter range

Caliber: DN 40~250mm

Flow rate: Q ~1000 m³/h

Head: H ~ 3200m

Temperature: T -80~+450℃

Design pressure: P ~35MPa

Maximum speed: N ~6000rpm

Scope of application

Transportation of clean or slightly polluted, low or high temperature, chemically neutral or corrosive liquids  Oil refinery/chemical plant/coal chemical engineering/refrigeration engineering/power plant/offshore engineering

Material standard

Casing: cast iron / spheroidal graphite cast iron / stainless steel / duplex stainless steel
Shaft: stainless steel / alloy steel
Impeller: cast iron / bronze / stainless steel / duplex stainless steel


It is a double-casing, radially split, between bearings multi-stage centrifugal pump. The built-in pump cartridge is an axially split BB3 pump cartridge, which has the following features:

•After passing the dynamic balance test, the rotor is directly mounted into the outer barrel without disassembly, and the dynamic balance accuracy and the part concentricity do not change.

•The impellers are arranged back to back, eliminating the balancing device.

• Double volutes balance the radial thrust. The diffuser structure for a small flow balances the radial thrust.

•The temperature field distribution of the inner pump tends to be more uniform and symmetrical, which improves the overall rigidity of the pump cartridge at high temperatures.

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