IDDC in India, partner for QUAVAC “VACUFLOW” sewerage systems. The most economical and environmentally friendly waste water collection system

1. Vacuflow ®
Vacuum Sewage Technology

2. Qua-Vac Vacuflow System ®
Interface valve unit Ejector pumpstation
The traditional method What is the Alternative?
Properties not connected to main drainage The QUA-VAC VACUFLOW® SYSTEM is a clean and highly efficient system for
now have to discharge sewage into cesspits environmentally acceptable sewerage disposal. Compared with traditional deep trench
or septic tanks. Hundreds of thousand of sewerage, construction and installation is considerably simpler and cheeper.
properties are still using this archaic method
which can cause environmental pollution if In addition, the Vacuflow® system is virtually maintenance-free. And, because it
not properly serviced. operates within a closed and leakproof vacuum system, the environment will benefit
too. No sewage can escape to pollute surrounding areas.
Of course we would like to bring these
properties on to main drainage but in most Experts in the field agree that in many applications, the Vacuflow® system is the better
cases they are situated in rural or and cheaper alternative to deep trench sewerage. The vacuum system is perfect for a
seaside areas. In these circumstances, the wide range of applications, particulary where expensive and tricate construction work
hilly or flat terrain (high water table) means is to be avoided. Think of areas of underain groundfill or shallow topsoil as well as
that the natural fall on which gravity systems areas with a high water table or where the environment is fragile.
depend, must be created artificially.
The advantages of the QUA-VAC system:
• Low investment costs • Small diameters
• Minimal maintenance • No deep trenches
• Quick excavation • Flexibility of piping
• Low energy consumption • Airation of sewage
• No ground pollution

3. Interface valve unit Vacuum pumpstation
Applications of the QUA-VAC The system consists of:
system: • House connection
• House boat projects • Interface bufferpot
• Sewerage of ribbon developments • Automatic vacuum valve
• Recreation areas • Vacuum pipeline
• Marinas • Ejector or vacuum pumpstation
• Industrial projects • Rising main
• Supermarkets
• Canal estates One of the characteristic features of the Vacuflow® system is the presence of
• Renovation projects a bufferpot. This bufferpot is actually an extra security in the system. Should
however a power failure occur, then this bufferpot will have a “reserve storage”
Select the QUA-VAC vacuum capacity of approx. 24 hours. In general the Vacuflow® system is used especially
system when and if a lot of connections and a large flow capacity is required.
Sewage flows by gravity into a bufferpot, A typical example is a project where 1500 houses use this system in a ribbon
whereas reserve storage is available. When development alongside a canal. Totally 72 kilometers of vacuumpiping and
the level of the sewage in the pot rises, a valve more than 1000 interface valve units are installed.
is activated which allows the contents to be
mixed with air sucked into the vacuum main.
This system has the advantage that more
properties can be connected to one interface
valve unit, thus allowing buffer capacity.

4. Introducing the QUA-VAC Vacuflow Interface ®
units 63 and 90mm valves
Cross section of 63mm valve
Complete Vacuflow® interface unit with 63mm valve, float activator and by-pass Vacuflow® 63mm valve
Qua-Vac is a company specialized in the vacuum sewage
technology with the longest experience in design and
supply of vacuum sewage systems world wide.
Great advantages:
• Fully submersible valve and level controller
• No “breather pipe” needed
• Transport of air and water suction occurs simultaneously
(much smaller vacuum pumps needed)
• Complete valve monitoring and cycle counting

5. Vacuflow® 90mm valve
Complete Vacuflow® interface unit with 90mm valve, float activator and by-pass. Starter valve
Features:
• Over 35 years installed in many world wide systems
• Full submersible valve and level controller
• No “breather pipe” needed
• Absents of level sensing pipe
• Highly reliable pneumatic/mechanical level float device
• No grease built up
• Simultaneous Air and Water suction and transport
• Unique patented air/water venture suction device, therefore;
• Guaranteed air/water ratio control in whole network
• Automatic air/water restore even after temporary system shut down
• No re-set or maintenance needed
• Standard Ball type of manual shut-off valves included
• Standard By-pass suction device
• All equipment in non corrosion and chemical proof materials
• Easy dismantling of valve, suction pipe and float activator
• Optional: valve monitoring and cycle counting
Worldwide, the Qua-Vac interface unit equipment has replaced whole
networks equipped with inferior vacuum valves of various manufacturers.

6. Operation of Vacuflow Float Controller ®
445
130 125 80 100
5 10
2 E
2 1
SEE ALTERNATIVES D 3 A
3 1 VACUUM
11 B
Variable
10
7 4
Variable
ALTERNATIVE I. ALTERNATIVE II.
9 Turn to 90 °
2
8
Sewage levels
6 11 sheet 211 Clamp with bracket Z Ø63 1
C START
min. 160
10 8091121 PVC clamp Ø63/Ø20 mm 1
9 Air inlet pipe Ø20 mm 1
8 Sheet 426 Socket Ø63 mm 1
7 Pipe Ø63 mm 1
Ø 63 6 Pipe Ø63 mm 1
STOP
5 Sheet 501 Discharge valve 1
4 5500301 Y-branch Ø63 mm 1
3
F
9940100 Elbow 2 or 3
2 Sheet 426 Socket Ø63 mm + nipple 1
1 Sheet 510/511 3-way PVC ball valve 1
Pos. Number Name Amount
In the standby position Suction cycle starts, sewage enters via suction pipe (F) the system
Vacuum in system is continously present till Piston valve (A) and sewage level in the interface unit decreases. Float lowers till
and Vacuflow starter valve (B). rod (D) switches the Vacuflow starter valve (C) in closed position.
Hereby the vacuum connection (1) goes in closed position, the
When float is at low level this is in rest position and the vacuum Piston valve (A) shuts and connection (2) comes in open position
connection (1) of the Vacuflow starter valve (B) remains in and atmospheric air enters via hose (E) the upper part of the Piston
closed position and an open atmospheric air connection (2) via valve (A).
the hose (E) to the Piston valve (A) is present.
The whole mechanism/system goes to standby position and ready
In the just switched position for an other discharge cycle.
When sewage enters the interface unit the float (C) with rod (D)
will rise and at a certain level the rod (D) will switch the starter
valve (C) in open position and via the connection (1) vacuum
will be transferred to upper part (3) of Piston valve (A) and
valve opens. The open connection (2) is closed during this
period and no atmospheric air can enter the vacuum hose
connection (E) towards the upper part (3) of the Piston valve
(A).

7. Startervalve
Piston valve closed
1st stage
Sewage flows via gravity
into the buffer pot.
Vacuflow valve is closed.
2nd stage
Start level is reached and
Startervalve
Piston valve opens
Vacuflow valve opened by
float - switch.
START LEVEL
Air inlet
Startervalve
Piston valve open
3rd stage
Water and air-mixture
is sucked from the
buffer pot.
Startervalve
Piston valve closed
4th stage
Stop level is reached and
Vacuflow valve closed by
float - switch.
STOP LEVEL

8. Vacuflow valve with monitoring sensor
®
Vacuflow® 90mm valve with sensor mounted On site advanced interactive trouble shooting
in HDPE interface pot monitor
For each individual vacuum network, a unique geographical plan
is made for the electronic touch screen, showing pot location,
behaviour and eventual alarm.

9. Telemetry
Qua-Vac’s Aquatell Scada system for monitoring
and cycle counting
The Aquatell software can contact the vacuum station by modem
and import all station data. On this screen, the complete layout is
shown with all vacuum mainlines and pots. Each pot has an unique
code to indicate the location. Pot cycle counting is achieved by data
logging, showing opening and closing times of all pots throughout
the day.

10. Advantages of the QUA-VAC
Advantages
Vacuflow System
®
Vacuflow
®
Gravity system
Gravity system Va c u f l o w S y s t e m
Vacuflow System
Numerous lift stations with their high capital
Numerous lift stations with their high capital allows shallow
Non-continuos slope allows shallow
cost and maintenance requirements are
cost and maintenance requirements are resulting in substantial
trenching to be used resulting in substantial
utilized to offset excessive excavation and
utilized to offset excessive excavation and savings and reduced
excavation cost savings and reduced
trecnching costs.
trecnching costs. installation time.
Excavating in areas of high water table
Excavating in areas of high water table minimizes dewatering
Eliminating and/or minimizes dewatering
is expensive due to complicated and time
is expensive due to complicated and time stabilization problems.
and trench stabilization problems.
consuming dewatering and trench
consuming dewatering and trench
stabilization procedures.
stabilization procedures.
Wide and deep trenches often make roads
Wide and deep trenches often make roads Small diameter mains, installed just below
mains, installed just below
impossible to pedestrians and vehicular
impossible to pedestrians and vehicular frost level allow shallow and narrow
shallow and narrow
traffic for long periods of time. Damage to
traffic for long periods of time. Damage to trenching thereby minimizing construction
minimizing construction
trees and landscaping can be severe.
trees and landscaping can be severe. time and environmental disturbances.
environmental disturbances.
Exfiltration can contaminate the
Exfiltration can contaminate the Absolutely fail-safe - field tested and
field tested and
surrounding area (water source, source,
surrounding area (aquifer, water opertated under vacuum conditions. A
vacuum conditions. A
lakes and rivers). Infiltration is a serious
lakes and rivers). Infiltration is a serious broken main, at worst, results in infiltration
worst, results in infiltration
problem resulting in existing treatment
problem resulting in existing treatment (easily detected) - never exfiltration.
never exfiltration.
becoming hydraulicaly overloaded and the
becoming hydraulicaly overloaded and the
imposition of compulsory over-sizing of
imposition of compulsory over-sizing of
treatment plants under design.
treatment plants under design.
Unforeseen obstructions such as water or
Unforeseen obstructions such as water or Vertical lift capability allows unforeseen
Vertical lift capability allows unforeseen
sewer mains, large rocks, etc. usually result
sewer mains, large rocks, etc. usually result obstructions to be easily passed over, under,
obstructions to be easily passed over, under,
in expensive field changes and line
in expensive field changes and line or around resulting in minimum delay and
or around resulting in minimum delay and
rerouting.
rerouting. eliminating extra costs.
eliminating extra costs.
200mm upto 400mm diameter concrete
200mm upto 400mm diameter concrete 90mm upto 200mm diameter PVC or HDPE
90mm upto 200mm diameter PVC or HDPE
pipe and vitrified clay pipe sewer main are
pipe and vitrified clay pipe sewer main are vacuum sewer mains are typical. Labor and
vacuum sewer mains are typical. Labor and
typical with material costs and excessive
typical with material costs and excessive materials costs for installing vacuum piping
materials costs for installing vacuum piping
unit labor costs.
unit labor costs. are dramatically lower, compared to gravity
are dramatically lower, compared to gravity
sewers, due to labor and trenching costs
sewers, due to labor and trenching costs
associated with smaller diameter vacuum
associated with smaller diameter vacuum
main.
main.
Qua-Vac B.V.
Qua-Vac B.V.
Televisieweg 157
Televisieweg 157
1322 BH Almere
1322 BH Almere
Phone: +31 (0)36 546 1999
Phone: +31 (0)36 546 1999
Fax: +31 (0)36 535 0909
Fax: +31 (0)36 535 0909
E-mail: info@quavac.com
E-mail: info@quavac.com
Website: www.quavac.com
Website: www.quavac.com

11. Applications of
the Qua-Vac Vacuflow System
®

12. Industrial Areas
Customer:
Hyundai Heavy Industries Co. LTD.
Location:
South- Korea
Qua-Vac Vacuflow system with three separate vacuum stations to collect sanitary waste and process water.
Each interface unit has it’s own control box and is operated by the central PLC panel inside the vacuum
station. Due to the very high flow, some interface units are equipped with two or three 90mm valves.
Villa Park
Customer:
Nakheel Development Company
Location:
Jumeirah Islands – Dubai, Middle-East
Villa park in the United Arab Emirates (UAE) which is equipped with three separate Qua-Vac vacuum systems.
These systems are fully controlled with electrical level sensors and activated by vacuum pressure. With this
control system, each individual interface unit can be monitored and controlled by the SCADA system. This
gives the operator the possibility to control the system in case of any possible high incoming flow.

13. QUA-VAC Interface Units Worldwide
Spain Bahrain Austria South Korea
France Dubai United Kingdom the Netherlands
Marinas
To empty holding tanks or bilge water tanks on board of ships, Qua-Vac can deliver complete vacuum
solutions. Remote stands on the boardwalk, executed with chip card or magnetic key, invisible consoles
underneath the boardwalk or a central disposal point, Qua-Vac can deliver tailor made solutions for each
project. Besides the collection of waste water from ships, the other sanitation in the marina can also be
connected to the vacuum system, serving the complete facility.

14. Reclaimed Islands
Customer:
Ossis Property Developers
Location:
Amwaj Islands – Bahrein, Middle-East
Six separate Qua-Vac Vacuflow systems are implemented to serve the villas on these reclaimed islands in
the Kingdom of Bahrain. The Vacuflow valves inside the interface units are equipped with a sensor system
to monitor, control en register any possible failures. Further, the sensor system can also indicate in real time
which pots are active or not. In total, 15.500 islanders are served by this Qua-Vac Vacuflow system.
UNICEF - United Nations
Customer:
UNICEF/ United Nations
Location:
Maldives
As part of the UN post-Tsunami project for the Maldives Islands, Qua-Vac has been given the order for
delivery of four separate vacuum sewer systems. Four islands, each occupied by 1400-2200 islanders, have
been supplied with a complete new Vacuflow sewer system. The supply included the complete ejector type
vacuum stations and all pre-mounted HDPE vacuum interface units.

15. www.quavac.com

16. Qua-Vac B.V.
Televisieweg 157
1322 BH Almere
The Netherlands
Phone: +31 (0)36 546 1999
Fax: +31 (0)36 535 0909
E-mail: info@quavac.com
Website: www.quavac.com