The OWS-PT is an innovative new ‘pressure type’ OWS which has been specifically developed for large vessels, including VLCC/ULCC and VLOC/ULOC class vessels. Its compact and flexible design is a direct response to feedback from shipowners and follows research into new ship designs which exposed the lack of space next to bilge water holding tanks where an OWS is traditionally installed.  

RWO product development team reviewed new ship specifications but as well the requirements of large shipowner of fleets of tankers, bulkers and large container vessels. Beside reliability, efficiency and regulatory compliance, operational expenditure (OPEX) made the top of the list. Merging these competing goals RWO came up with the new pressure-type OWS-PT. 

When using a suction-type OWS, the pump draws the water from the bilge holding tank through the separator’s coalescer stage. However, the suction head of the pump is often not enough for the OWS to be installed on higher decks. Hence, a second supply pump would need to be installed when using this type of OWS.   

The OWS-PT eliminates the need to install an additional feed pump and offers greater flexibility for installation as it does not need to be located beside the bilge water tank. The new pressure-type separator is therefore ideal in cases where the OWS needs to be installed several meters above the bilge holding tank. For example, the pump could be installed on the tank top where it can push the water up to the OWS-PT at its location on an upper deck. The ship designer can then choose the most suitable location to install the OWS without needing to install additional pumps.   

Furthermore, the OWS-PT is simple to operate and maintain for ships with fewer technicians and crew onboard as it includes a PLC based control which can be easily integrated with a ship’s controls and AMS system.

Key Features & Benefits

• No need for auxiliary pump
• Designed for world’s largest ships 
• Optimized for low OPEX  
• Simple operation 

With more than 16.000 units sold, we are the leading provider of oily water separators.

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