Pump components geometry, optimised through hydraulic, structural, thermal and dynamic F.E.M. analysis, lead to an high product reliability. Particularly to avoid seizures correlated to dangerous resonances, the F.E.M. dynamic analysis is carried out on all manufactured pumps taking into account the proper site operating conditions. 
Closed type impeller with front and rear wear rings as well as balancing holes, to minimise the axial thrust.
Large eye single suction or double suction 1st. stage impeller to meet low NPSH requirements.
Deep stuffing boxes, designed in accordance to API 682 Std., suitable to accept any type of mechanical or packing seal.
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 1 to 14.
Pump shaft in one or at the maximum two pieces, fully machined to respect the more restrictive run-out API limits.
Air fan cooling system provided on bearing bracket.
As a standard, the rotor axial thrust is supported by a duplex oil lubricated ball angular contact type bearings.
Renewable bushings are provided at all interstage casings and columns.

Technical data

Capacities: up to 1800 m3/h (8000 USgpm)
Heads: up to 2000 m (6500 feet)
Temperatures: from -150°C (-240°F) to 400°C (750°F)
Design working pressure: up to 210 barg (3000 Psig)
Rotational speed: up to 3800 rpm

Design options

Additional rigid coupling to facilitate mechanical seal maintenance activities.
Inside drain line.
Axial thrust tilting pad bearings for ultra high thrust operating condition.
Anti reverse rotation device.
Special bearing isolators at either bearing housing ends.
Oil mist lubrication (pure or purge).
Temperature and/or vibration detection and monitoring equipment.