Main design features

• Opposed impeller and diffuser configuration to minimise axial and radial hydraulic thrusts.
• Large eye single suction or double suction 1st stage impeller to meet low NPSH requirements.
• Hydraulic performances checked on a Single Stage Test Equipment. This is particulary useful to verify the effective 1st stage NPSH.
• Easy internal inspectability and maintenance.
• Number of stages rangeable from 4 to 13.
• "Stiff shaft design". Rotor operates below it’s 1st wet critical speed.
• Central and lateral balancing drums adequately shaped to optimise pump rotordynamic behaviour.
• Side-Side suction and discharge nozzles integrally cast on lower casing half.
• Near centerline casing mounting for high temperature stability.
• Contoured grafoil or glassfiber gasket to assure joint between casing halves and eliminate interstage leakages.
• Deep stuffing boxes, designed in accordance to API 682 Std., suitable to accept any type of mechanical or packing seals.
• Labyrinths and deflectors at either bearing housing to maximise protection against dirt.

• Three bearings arrangements available:
  

  1. Ball Radial / Ball Thrust
  2. Sleeve Radial / Ball Thrust
  3. Sleeve Radial / Tilting Pads Thrust (Kingsbury Type).

Technical data

• Capacities:  up to 1100 m3/h (5000 gpm)
• Heads:  up to 2500 m (8200 feet)
• Temperatures:  from -30°C (-20°F) to 200°C (400°F)
• Design working pressure:  up to 210 barg (3000 Psig)
• Rotational speed:  up to 5000 rpm
• Max hydrotest pressure:  up to 315 barg (4500 Psig)

Design variations

In addition the following pump designs can be provided:

• De-staged construction.
• Replaceable stuffing box cooling or heating jackets.
• Double shaft extension.
• Cylindrical fit at coupling shaft end.
• Casing guidekeys for high temperature application; over 120°C (250°F).
• Special bearing isolators at either bearing housing ends.
• Roller, "CARB" or hydrodynamic line bearing for high temperature application.
• Oil mist lubrication system (pure or purge).
• Forced feed lubrication system.
• Temperature and/or vibration detection and monitoring equipment.

Applications

• Boiler Circulation

• Boiler Feedwater

• Cargo Loading and Unloading

• CO2 Injection

• Coolant Injection

• Crude Oil Loading

• Desalination

• Descaling

• Emergency Feedwater

• General Processing Industry

• High Pressure Water Injection

• Hydrocarbon Processing

• Metal and Steel Industry

• Offshore

• Oil Production

• Oil Transportation

• Petrochemical Processing

• Petroleum Production and Refining

• Pipeline

• Power Generation

• Power Recovery

• Process Charge

• Reactor Feed

• Reactor Water Cleanup

• Sea Water

• Steam Generator Feed

• Utility

• Water

• Water Cooling

• Water Injection