These pumps are specifically used on sump applications.
Pump components geometry optimised through hydraulic, structural, thermal and dynamic F.E.M. analysis lead to an high product reliability.
Closed type impeller with front and rear wear rings as well as balancing holes, to minimise the axial thrust.
Large eye single 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.
Pump shaft fully machined to respect the more restrictive run-out API limits.
As a standard, the rotor axial thrust is supported by a duplex oil lubricated ball angular contact type bearings.
Discharge column, line shaft and support column may consist of multiple sections, depending upon the pump setting. Discharge column mounted with a sliding fit through the sole plate to account for thermal expansions.
Renewable intermediate bushings, lubricated by the same pumped fluid or from an external source, are provided in correspondence of all column sections.

Technical data

Capacities: up to 4000 m3/h (17600 USgpm)
Heads: up to 200 m (700 feet)
Temperatures: from -30°C (-20°F) to 450°C (850°F)
Design working pressure: up to 40 barg (600 Psig)
Rotational speed: up to 3800 rpm

Design options

Inducer for extremely low NPSH requirements.
Semi-open impeller with wear plates fitted on suction casing.
Full jacketed body.
Additional rigid coupling to facilitate mechanical seal maintenance activities.
Rectangular or circular soleplates.
Suction strainer.
Anti reverse rotation device.
Air fan or water cooling system provided on bearing bracket and /or mechanical seal under requirements.
Special bearing isolators at either bearing housing ends.
Grease lubrication
Oil mist lubrication (pure or purge).
Temperature and/or vibration detection and monitoring equipment.