Collection – Vacuum Toilet System

Evac offers vacuum collecting units for all types of vessels, from yachts to cruise liners and naval installations. Evac vacuum collecting units create a powerful vacuum and are optimized for each application. The units have been designed to work reliably under heavy duty conditions and to bring energy saving benefits. They are designed for installation as part of the chain that makes up the waste water collection and treatment system on board vessels.
Evac offers a variety of vacuum toilets for different applications. Typical features include a water-saving flush, elegant design, reliability and low sound level in use. Toilets are available in porcelain and in robust stainless steel, and the range includes shock tested navy and squatting toilets. Interface valves are available to connect gravity lines to the vacuum piping system.

Vacuum generation

Evac OnlineMax

The Evac OnlineMax is currently the most powerful and energy efficient vacuum collecting system on the market. The Max concept was specially designed as an energy efficient way to meet the continuously increasing demands for better vacuum capacity on large vessels. The OnlineMax pump offers significant long-term operational savings – the bigger the vessel, the bigger the financial benefit.

Multiple advantages:

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  • High-capacity, low-footprint design
  • Quick and flexible installation
  • High energy efficiency
  • Simple, fully automatic operation
  • Robust design and quality, reliable components
  • No foaming and no need for antifoaming chemicals
  • No collecting tank needed
  • Vacuum performance independent of discharge head
  • Discharge up to 20 metres
  • No cooling or sealing water

Evac OnlineVac

The Evac OnlineVac is particularly suitable for vessels with medium-sized passenger and crew capacity. The OnlineVac macerates the sewage created on board as well as reliably generating the vacuum required for the discharge process.

The improved design of the OnlineVac features extra strong bearings, heavy duty mechanical seals and an electric motor with an IEC flange connection. As well as being robust and reliable, the OnlineVac has been designed to be easy to maintain and offers ship owners lower running costs than earlier generation models.

The vacuum pumps and pump casings are manufactured from stainless steel. Pumps are also available as a retrofit version.More Details

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Evac OnlineFlex

The OnlineFlex is a robust mechanical pump designed to create and maintain constant vacuum in a vacuum toilet system without the need for intermediate tanks.  The OnlineFlex was specially designed to increase installation flexibility without compromises.

Benefits of OnlineFlex unit:

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  • Flexible installation and operation
  • Robust “plug and play” design
  • Small footprint
  • Discharge up to 15 meters
  • Silent
  • Evac Speed Boost models with soft start

Evac Vacuum Tank Units

Vacuum tanks are the original technology first used on board marine vessels.
Vacuum tank systems consist of a vacuum tank (normally 1-6 m3 in capacity), vacuum pumps and sewage discharge pumps. Unlike the OnlineMax, for example, sewage is collected to the tank and discharged in batches. As with the OnlineMax, vacuum is created by special vacuum pumps but the vacuum tank also acts as a big vacuum buffer for the system.

Benefits of the Evac EcoVac tank are:

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  • Modern compact design with optimized components
  • The best efficiency in energy consumption
  • High capacity with small footprint
  • Wastewater holding capacity
  • Additional vacuum volume in the tank
  • Available with different vacuum capacities

Evac Ejector Units

The ejector vacuum collecting units are made using proven, robust technology, which is simple and reliable and still present a good option for certain applications.  They have fewer moving parts than other solutions, making them extremely low maintenance.
Ejector vacuum collecting units have a flexible design offering a large number of different possible variations and holding tank alternatives. They can be directly mounted in a sewage treatment plant or ship’s hull tank.
The ejectors’ aeration effect on sewage means that there is no need for additional aeration of vacuum collecting units.  This means no hazardous H2S gases and/or odors from the aerobic waste water process.

Quavac qua-vac vaccuum toilet systeem system sewer riolering persriool

Evac VacuConvert

Evac VacuConvert gives designers more choice by converting gravity toilets.

Vacuum toilets offer many advantages on luxury yachts and specialized cruise vessels including lower water consumption and a more efficient action. In the past, designers have tended to choose traditional gravity toilets because they are available in a wider range of colours and styles, but now Evac has developed a solution that gives them the best of both worlds.

The Evac VacuConvert enables conventional wall-mounted gravity toilets to be easily and inexpensively turned into vacuum toilets. A special wall mounted frame, which can be concealed beneath panelling, enables them to be connected to the Evac vacuum collection system. This is compatible with a wide range of gravity toilet models and broadens the range of options for yacht interior designers.

After conversion, the toilet uses just 2.5 litres (0.6 gallon) per flush, a considerable water saving, amounting to thousands of litres over the period of a year. As designers look toward new ways of conserving water and reducing the environmental impact of vessels, the VacuConvert provides a reliable solution. The Evac VacuConvert front access panel, available as an extra, allows maintenance work to be carried out quickly and easily, if required.