Conventional drainage systems (gravitational) are not only expensive but require constant maintenance. They are the breeding ground for rodents, cockroaches etc. Installing a conventional drainage system is expensive in large housing colonies, Commercial establishments where external land may not be available for laying underground piping systems and where the soil conditions may not be conducive to laying the underground piping system (hard/rocky strata), or where the sewerage has to be transported against gravity, or where water tables are very high. Laying conventional drainage system in the above mentioned areas could cost more money by way of indirect expenses and may also require regular maintenance of chocked lines, maintenance of manholes, collections pits, and installation of submersible pumps etc.
Vacuum Drainage system is the most ideal alternate to conventional gravity disposal system. Molecular Drag pumps can develop 29” of vacuum column, thus generating 200 mtr.cube of air, thereby pulling drainage at a velocity of 6 meters per second. The system is capable of pulling practically everything; from sewage to sanitary napkins, bones, vegetable waste, grease even chains, curtains, cloth, thick viscous liquids and much more, every operation leaves the pipe clean and empty, no air , no water hence no growth of bacteria, no chockages.
No manholes are required since no maintenance is necessary, deep excavation is not required since the system works against gravity.
Advantages at a Glance
Transporting Drainage becomes hassle free and remains cost effective.
External disposal does not require excavation.
Drainage is transferred against gravity.
Sewage travels at high velocities of up to 6 meters per second.
The most ideal solution for areas having hard strata, high water line areas and large sewage disposal network.
NO CHOKAGES * NO BAD ODOUR * NO MANHOLES
MAINTENANCE FREE
PROVEN TRACK RECORDS WORLD WIDE
Working of such a System
Vacuum systems can be used to collect a variety of fluids, however they are most commonly used to collect sewage from within domestic housing developments.
The three main components of which are as follows :-
Valve Chambers serving two purposes; a) to collect the effluent discharged from the connecting properties, and b) to allow the collected sewage to enter the sewer network via the Iseki interface valve.
Vacuum Sewers forming the pipe network through which vacuum pressure is transferred to the Iseki interface valves within the collection chambers and along which the effluent is transported to the vacuum station.
Vacuum Station being the heart of the system and is where the vacuum pressure is generated for the whole sewerage network which allows the effluent to be collected and forwarded to the sewage treatment plant.
THE FUNCTION OF EACH ELEMENT ARE BRIEFLY EXPLAINED HEREIN BELOW.
The Valve Chamber
Sewage arrives via normal gravity pipes at the lower section, or wet sump, of the valve chamber just like a manhole in a conventional gravity system.
As the level of the effluent within the wet sump rises, air is trapped in a pipe called a 'sensor pipe', the pressure of which increases as the effluent level continues to rise.
This increase in air pressure is subsequently transferred via flexible tubing to the top section of the interface valve which is known as the 'controller'.
Eventually this pressure becomes great enough to operate a switch within the controller which then allows vacuum pressure to be transferred to the main body of the valve and cause it to open.
With the valve in the open position, air at atmospheric pressure acting on the surface of the liquid within the wet sump then forces the sewage into the 'suction pipe', past the interface valve and onward into the sewer pipe network.
Once all of the sewage has been removed from the wet sump, the valve remains open for a short period of time to allow air at atmospheric pressure to enter the sewer pipe network.
The valve then closes under the action of a spring to complete one cycle.
