1. General system description

In vacuum systems, sewage transport is done by vacuum (air) instead of water and gravity. Sewage is transported in "slugs". Optimal "slug" transport is obtained by following these general Design and Installation instructions.

System capacity must be dimensioned considering normal daily variations in use and different operation conditions.

System load (flushings) should be divided evenly between main lines. Ships pitch, a roll and trim shall be considered in horizontal pipe design to prevent sewage back flow. The best horizontal transport solution is obtained with sloped pipe, transport pocket at interval of 25 - 30m and/or non-return valve. Piping shall be designed so that possible clogging or maintenance is not stopping the whole system. System pipe tightness must be tested, documented and maintained for good system operation and low energy consumption. Piping shall be accessible and divided in sections for easy maintenance.

*) The collecting unit can be based on Evac ejector system, where the collecting tank is under atmospheric pressure, or on Evac vacuum tank system, or On-line vacuum generating system.

2. Scope of Supply
- Vacuum toilets
- Vacuum Interface valves
- Vacuum piping inspections and
instructions
- Vacuum ejector collecting systems
- Online vacuum systems
- Vacuum tank collecting systems
- Grease separators
- Biological treatment plants
- Physical chemical treatment plants
- Membrane treatment plants
- Wastewater automation/remote
control
- Gray water pumping stations
- Mil. spec. solutions
- Sludge dewatering
- Waste treatment
- Food waste
- Control system
- Waste incinerator
- Heat recovery
- Flue gas cleaning