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 NPSHR.
• Full cartridge design.
• Easy maintenance procedure.
• Number of stages rangeable from 4 to 14.
• Shrink fitted impellers for higher operational speed (over 4500 rpm).
• "Stiff shaft" design. Rotor operates below it’s 1st wet critical speed.
• Central and lateral balancing drums adequately shaped to optimise pump rotordynamic behaviour.
• Barrel forged in suitable material to improve stress and corrosion resistance.
• Centerline casing mounting for high temperature stability.
• 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 3600 m (12000 feet)
• Temperatures:  from -30°C (-20°F) to 400°C (750°F)
• Design working pressure:  up to 350 barg (5000 Psig)
• Rotational speed:  up to 7000 rpm
• Max hydrotest pressure:  up to 525 barg (7500 Psig)

Design variations

In addition the following pump designs can be provided:

• De-staged construction.
• Replaceable stuffing box cooling or heating jackets.
• "Dry running" capability as per Duncan and Hood criteria.
• Double shaft extension.
• Cylindrical fit at coupling shaft end.
• Casing guide keys 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 Feedwater
• Brine Injection
• CO2 Injection
• Coolant Injection
• Decoking Jet Water
• Descaling
• Heater Charge
• High Pressure Water Injection
• High Temperature Service
• Hydrocarbon Processing
• Hydrocracking
• Hydrotreating
• Low Pressure Safety Injection
• Offshore
• Oil Production
• Oil Transportation
• Petrochemical Processing
• Petroleum Production and Refining
• Pipeline
• Power Generation
• Power Recovery
• Reactor Feed
• Steam Generator Feed
• Utility
• Visbreaking
• Water Cooling
• Water Injection