Air handling Methods Recirculation of discharge Liquid ring

Air handling Methods

• • • Recirculation of discharge Liquid ring pump Dry ring pump Ejector Eccentric vane pump

Rotary Air Extraction Pump

Central Priming System

To Vacuum Pump Vacuum Tank Automatic Vent Valve (with Lever Controller) Pump Suction

Submerged Pump

Deck • • • Hydraulic Room Hydraulic Pump Accumulator Pipeline to Hydraulic Motor

Hydraulic Motor • Variable speed • Power – High efficiency – Energy consumption according to actual need – Soft start (no inrush peaks)

• Control – Independent control for each pump – Accurate, variable control – Low mechanical wear (impeller/casing) – Low cavitation – Programmable • • Minimized discharge time Minimum cavitation Liquid level Specific gravity – Connection to cargo-monitoring

Stripping Procedure • When the cargo tank is empty, the cargo stripping pump valve has to be opened and the main cargo valve to be closed. • The running cargo left is purged by means of inert gas or air via the stripping line pipe into the cargo line on deck. • During purging/stripping procedure, the pump should be kept running ( the impeller acts as a dynamic foot valve) until the cargo pipe has purged empty • This procedure will generate an absolute minimum of the remaining cargo in the pump well

Pump Body • It is welded or flanged to the pipestack. • The hydraulic motor is very compact and located inside the pumphead and surrounded by return hydraulic oil. • Short independent shaft supported by bearings lubricated by hydraulic oil • Connected to the impeller.

Features • • Pump material – stainless steel Stepless capacity control/remote operation Single stage, single suction, axially balanced Smooth surface unit – easy to clean Anti-rotation brake – loading thru’ pump Bearing lubricated by hydraulic oil Designed for dry running In tank replacement without interfering hydraulic section