Naval and Marine Applications

Fox Liquid Eductors for Naval and Marine Applications

Bilge & Ballast Water 

In 1898, the Royal Navy installed their first liquid/liquid eductors to pump out bilge water from below decks and discharge overboard, The US Navy followed shortly thereafter. Using multiple no-moving-parts- eductors, driven by existing headers of seawater at 30 – 100 psig eliminated the unattractive option of maintaining various, small electromechanical pumps in a harsh, corrosive seawater environment. Liquid/liquid Eductors on sea-going vessels, drilling platforms, and dredges has been common practice ever since.

Available materials of construction include copper-nickel alloys, naval bronze, Monel, PVC, stainless. and. Others. End connections can be naval or ANSI flanges, NPT or BSP threads, or as specified. QA – Quality services available – include hydrotest, code welding, radiography, etc.

Ballast Water Treatment – Hypochlorite

Fox venturi eductors are now in the hulls of many sea-going vessels, included in critical systems to meet existing global regulations related to Ballast Water. Adopted in 2004, the BWM Convention requires ships to control the transfer of potentially invasive species in their ballast
water with an effective biocide. The treaty is now in full force.

One of a number of OEM systems available to global merchant and naval fleets includes electrolytic cells to produce hypochlorite on board ship: hypochlorite generation and use is a viable method to eliminate aquatic nuisance species from ballast water while minimizing disinfection byproducts and residual toxicity.

This extremely corrosive fluid requires titanium piping. Since Fox has supplied hundreds of titanium steam ejectors for chlorine service in paper bleaching systems at paper mills, it was straightforward for Fox to supply titanium liquid/liquid eductors for this hypochlorite application.