Pump components geometry optimised through hydraulic, structural, thermal and dynamic F.E.M. analysis lead to an high product reliability. The "modular design" philosophy permits to cover a wide range of applications replacing the main hydraulic components i.e. only impeller/diffuser. Casing, shaft, mechanical seals, bearing frames result therefore fully interchangeable and reusable. 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 particularly useful to verify the effective 1st stage NPSHR.
Easy maintenance procedure.
Central and lateral balancing drums adequately shaped to optimise pump rotordynamic behaviour.
Shrink fitted impellers for higher operational speed (over 4500 rpm).
Full cartridge design.
Centerline casing mounting for high temperature stability.
Barrel forged in suitable material to improve stress and corrosion resistance.
Deep stuffing boxes, designed in accordance to API 682 Std., suitable to accept any type of mechanical or packing seals.
Axial split bearing housing for easy inspection and maintenance procedure.
Labyrinths and deflectors at either bearing housing to maximise protection against dirt.
A wide range of sizes and material combinations complete the variety of the offered product.

Main design features

Fully designed according to latest Edition of API 610 Std.
Number of stages rangeable from 4 to 14.
Rotor operates away it’s critical speeds.
A wide range of sizes, number of stages and material combinations complete the variety of the offered product.
Casing guide keys for high temperature application; over 120°C (250°F).
‘CARB’ or hydrodynamic line bearing for high temperature application.
Three bearings arrangements available:
Ball Radial / Ball Thrust
Sleeve Radial / Ball Thrust
Sleeve Radial / Tilting Pads Thrust (Kingsbury Type).

Technical data

Capacities: up to 1800 m3/h (8000 USgpm)
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

Design options

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.
Special bearing isolators at either bearing housing ends.
Oil mist lubrication system (pure or purge).
Forced feed lubrication system.
Temperature and/or vibration detection and monitoring equipment.
Baseplate available with three point gimbal mounting (FPSO services).