⚓ Marine & Offshore
Bilge, ballast and cargo pump priming, condensate extraction and fresh water generator vacuum.
Marine & Offshore — Ejector Applications
Pump priming, bilge / ballast / cargo systems and fresh water generators
Bilge, Ballast & Cargo Pump Priming
Marine centrifugal pumps handling bilge water, ballast water and liquid cargo are installed below the waterline and must be primed before starting. Air ejectors (compressed air driven) are used as priming ejectors to evacuate the pump suction line and casing, allowing the pump to self-prime reliably before start. A pressure switch on the pump discharge automatically cuts out the ejector when full flow is established. Primetech manufactures a complete range of marine ejectors to class society standards (Lloyd's, DNV, Bureau Veritas) for newbuilding and retrofit.
Fresh Water Generator Vacuum
Shipboard fresh water generators (FWGs) produce potable water by flash evaporation of sea water under vacuum (typically 60–90 Torr), using waste heat from the main engine jacket water. Steam ejectors — or more commonly, sea water jet ejectors using high-pressure sea water as motive fluid — maintain the vacuum in the FWG evaporator and condenser. Primetech sea water jet ejectors in seawater-resistant materials (naval brass, Duplex SS) are proven in FWG service across multiple vessel classes.