Main design features
- In-line arrangemement for suction and discharge nozzles integrally cast with the casing.
- Twin volutes ( for sizes with discharge nozzle > 2" ) minimise radial loads for extended pump life.
- 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.
- Back pull-out design allows all pump maintenance activities without motor removal.
- Stiff shaft design.Rotor operates below 1 st. critical speed.
- As a standard, the rotor axial thrust is supported by a duplex oil lubricated ball angular contact type bearings.
- 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.
Technical data
Capacities: up to 3400 m3/h (15000 gpm)
Heads:
up to 300 m (1000 feet)
Temperatures: from -150°C (-240°F) to 400°C (750°F)
Design working pressure : up to 100 barg (1400 Psig)
Rotational
speed: up to 4000 rpm
Max hydrotest pressure: up to 150 barg (2100 Psig)
Design variations
In addition, the following pump designs can be provided:
- Inducer can be installed for extremely low NPSH duties
- Heavy duty bearing housing for high suction pressure applications.
- Anti reverse rotation device.
- Air fan cooling system provided on bearing bracket and /or mechanical seal when required by hot temperature applications.
- Special bearing isolators at either bearing housing ends.
- Grease lubrication
- Oil mist lubrication ( pure or purge ).
- Temperature and/or vibration detection and monitoring equipment.
Applications
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