Easier and cheaper on-board helicopter refueling at naval standards

DESMI introduces a new ship-based helicopter fueling system that not only makes it less expensive but also much easier to service and maintain.

Navies and coast guards of the world now have the possibility to get a ship-based helicopter fueling system with several advantages that not only make it better, but cheaper, too.

These advantages include a new, modular design for lower overall cost and faster maintenance, lighter weight, an improved user interface that makes it easier to operate, and an integrated logistics system. All of this is in a proven design at NATO STANAG standards. This includes options for both on-deck or Helicopter In-Flight Refueling (HIFR).

“This will be a wonderful benefit to the navies and coast guards of the world, both technically and commercially. Taxpayers will truly get value for their dollar,” says Christian Wollerup, Segment Director for Defence and Fuel Products at DESMI.

Modular design

As a market leader in helicopter refueling systems, DESMI has previously customized each unit for every customer, depending on their needs. While that option is still available, it comes at a cost. So DESMI has introduced a system built in modules – where customers can choose among the different pieces that fit together – “a bit like Lego bricks” – into a whole unit, according to Christian.

The modules’ combinable pieces include pump units, filter units, control systems and dispenser units. Each module has up to several different options – with 21 modules in all.

For example, the customer chooses the type and number of pumps in the pump unit, the number of filters needed, the type of control system, and so on. The modularlisation means DESMI can use standardised products in each module, bringing the cost down.

Thus, customers in India, Singapore, USA, Canada, the UK, Germany, France, Italy or Spain can build a complete, modular system with the standard components for their own navy’s or coast guard’s specific needs.

In addition, the new design allows easy access to all components in the finished design for easy maintenance. “There’s basically not one component that you can’t replace within 15 to 30 minutes,” Christian says. “In other systems, it can take considerably longer. So basically, we’re reducing downtime during maintenance considerably.”

Lighter and safer

DESMI offers the new system in three different sizes: 230 litres per minute (l/m), 480 l/m and 680 l/m.

Each system comes with an optimized bottom plate in order to save weight and increase strength. Thus, ship designers will save 20% on weight of the helicopter fuel system with the new DESMI products – a benefit for warships that need to cut down on weight whenever possible.

In addition to the lighter base plate, DESMI has introduced vane pumps to the design. Fuel enters through a prefilter to the pump, then it passes through a safety valve and then a filter water separator. This filter, along with a brand new water barrier technology on the dispenser unit, serves the important purpose to make the fuel clean and dry. It separates water droplets down to 5 ppm, and it also removes solid contaminants. As of this writing, the water barrier technology is still in final testing. Once it is approved, DESMI will retrofit the new water barrier technology into new modular systems by just changing a pipe and the filter, thereby helping customers to achieve even safer operations in austere conditions.

As with previous DESMI refueling systems, the new system is also optimised for HIFR operations – for refueling during extreme waves or weather, when it is too difficult for the helicopter to land safely on board. Also as previously, the system has been “designed from the tank all the way up to the helicopter,” ensuring safe and dry fuel in any operation scenario.