Main design features
- Double suction, closed impeller, with solid hub, to maintain axial balance, under different operating conditions.
- Stiff shaft design. Rotor operates below it’s 1st critical speed.
- Suction and discharge nozzles, integrally cast with the casing, are normally arranged in top-top position. Side-top or
side-side nozzle arrangements are available.
- Centerline casing mounting for high temperature satbility.
- Deep stuffing boxes integrally cast with pump casing, 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:
- Ball Radial / Ball Thrust
- Sleeve Radial / Ball Thrust
- Sleeve Radial / Tilting Pads Thrust (Kingsbury Type).
Technical data
- Capacities: up to 6000 m3/h (26000 gpm)
- Heads: up to 400 m (1300 feet)
- Temperatures: from -30°C (-20°F) to 455°C (850°F)
- Design working pressure: up to 32 barg (900 Psig)
- Rotational speed: up to 4000 rpm
- Max hydrotest pressure: up to 210 barg (3000 Psig)
Design variations
The following pump designs can be provided:
- For extremely low NPSH duties, a number of DSA pumps can be equipped with inducers.
- Steam jacketed casing for special applications.
- Replaceable stuffing box cooling or heating jackets.
- Double shaft extension.
- Cylindrical fit at coupling shaft end.
- 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
|