Fluid handling, regulation and control

Fluid handling, regulation and control

Fluid handling, regulation and control

TMA – Multistage centrifugal pumps with closed impeller


The multistage centrifugal pumps of the TMA series pumps are pumps that employ a closed type impeller design. The impellers are in series so that the head increases as the liquid being pumped is transferred from each impeller.

On the multistage centrifugal pumps of the TMA series, the axial thrusts are balanced by balancing blades on the back of the impeller. The remaining thrust forces are absorbed by the heavy duty single ball bearing at the non-drive end and angular bearings at the drive end.

For pump designs that have two external bearings, a pressure pipe is provided to relieve pressures in the seal area from the discharge side of the pump to the suction side.

The TMA pump design uses the latest foundry technologies. This allows for one piece components which effectively increases pump efficiencies, at the same time, reducing the weight of the pump without sacrifing the overall strenght and durability. For the smaller TMA 31 & 32 series a close coupled design is available where space is limited. This design also eliminates any concerns for misalignment, which will enhance the pump’s performance and extend the overall life of the pump.


The TMA pump series can be fitted with any type of mechanical seal that is unified to the ISO 3069/UNI EN 12756 standards. Single mechanical seals, double mechanical seals in tandem or back to back arrangements can be fitted. The pump bearing frame offers versatility and plenty of space to also allow fitting special types of mechanical seals that may not have unified dimensions or, for pumps series TMA 40 and 50 only, cartridge type seals.


  • Impeller: Closed
  • Max flow m³/h: 45
  • Max pressure bar: 40
  • Pumped fluids: Clean and non-abrasive liquids
  • Self-priming: No
  • Stages nr.: 3-15
  • Seal: Mechanical or packing gland
  • ISO: No


  • Boiler feed
  • For handling clean or slightly dirty liquids
  • For heating plants
  • Water supply piping
  • Autoclaves
  • Fire fighting operations
  • Agriculture and irrigation


  • Capacity from 1 to 45 m3/h
  • Head from 40 to 400 m.
  • Temperature tolerance: max 120°C (250°F) without cooled stuffing boxes; 160°C (320°F) with cooled stuffing boxes.
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