BB4 type pumps – Single-casing radially split multistage between-bearings pumps.

 

 

These pumps are intended for heavy operating conditions, high temperatures and pressures. Various combinations of size and materials are available, which are suitable for wide range of processes and industrial application. The pumps are intended for heavy duties.

 

- Solid casing is manufactured by casting with centerline support to compensate expansions during operation at high temperature +400 oС. Pump casing and flanges are designed for increased loads. Self-ventilated casing with centerline supports and double volute diffuser.

 

- Solid casing is manufactured by casting with centerline support to compensate expansions during operation at high temperature +400 oС. Pump casing and flanges are designed for increased loads. Self-ventilated casing with centerline supports and double volute diffuser.

Shaft deflection in seal friction surfaces points of contact influences the most on mechanical seal service life. Balancing disks or pistons are used for shaft axial forces balancing; the impellers can also be hydraulically balanced due to balancing holes.

 

- Impeller design: Конструкция рабочего колеса — one-piece cast closed type. Separate balancing of pump impellers acc. to class G1.0. Impeller and diffuser are separated from the next stage using a seal; therefore increase of number of stages is possible.

 

- Pump bearings are fitted with temperature and vibration sensor mounted on external bearing assemblies items 350 and 210. Sensors replacement and monitoring is easy and convenient.

Bearings minimum life is 25,000 running hours at rated duty.

Parameters Values
Flowrate 10-900m3/h
Head up to 2500 m
Operating pressure up to 275 bar
Operating temperature -30..+400°С
Shaft seal Single mechanical, double mechanical