Vacuflow®

Vacuum Sewage Technology

Qua-Vac Vacuflow®

System

What is the Alternative?The QUA-VAC VACUFLOW® SYSTEM is a clean and highly efficient system for environmentally acceptable sewerage disposal. Compared with traditional deep trench sewerage, construction and installation is considerably simpler and cheeper.

In addition, the Vacuflow® system is virtually maintenance-free. And, because itoperates within a closed and leakproof vacuum system, the environment will benefittoo. No sewage can escape to pollute surrounding areas.

Experts in the field agree that in many applications, the Vacuflow® system is the betterand cheaper alternative to deep trench sewerage. The vacuum system is perfect for awide range of applications, particulary where expensive and tricate construction workis to be avoided. Think of areas of underain groundfill or shallow topsoil as well asareas with a high water table or where the environment is fragile.

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

The traditional methodProperties not connected to main drainage now have to discharge sewage into cesspits or septic tanks. Hundreds of thousand of properties are still using this archaic method which can cause environmental pollution if not properly serviced.

Of course we would like to bring these properties on to main drainage but in most cases they are situated in rural orseaside areas. In these circumstances, the hilly or flat terrain (high water table) means that the natural fall on which gravity systems depend, must be created artificially.

Interface valve unit Ejector pumpstation

The system consists of:• House connection• Interface bufferpot• Automatic vacuum valve• Vacuum pipeline• Ejector or vacuum pumpstation• Rising main

One of the characteristic features of the Vacuflow® system is the presence ofa bufferpot. This bufferpot is actually an extra security in the system. Shouldhowever a power failure occur, then this bufferpot will have a “reserve storage”capacity of approx. 24 hours. In general the Vacuflow® system is used especiallywhen and if a lot of connections and a large flow capacity is required.A typical example is a project where 1500 houses use this system in a ribbondevelopment alongside a canal. Totally 72 kilometers of vacuumpiping andmore than 1000 interface valve units are installed.

Applications of the QUA-VAC system:• House boat projects• Sewerage of ribbon developments• Recreation areas• Marinas• Industrial projects• Supermarkets• Canal estates• Renovation projects

Select the QUA-VAC vacuum systemSewage flows by gravity into a bufferpot, whereas reserve storage is available. When the level of the sewage in the pot rises, a valve is activated which allows the contents to be mixed with air sucked into the vacuum main.

This system has the advantage that moreproperties can be connected to one interfacevalve unit, thus allowing buffer capacity.

Interface valve unit Vacuum pumpstation

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

Introducing the QUA-VAC Vacuflow® Interface units 63 and 90mm valves

Complete Vacuflow® interface unit with 63mm valve, float activator and by-pass Vacuflow® 63mm valve

Cross section of 63mm 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 wholenetworks equipped with inferior vacuum valves of various manufacturers.

Complete Vacuflow® interface unit with 90mm valve, float activator and by-pass. Starter valve

Vacuflow® 90mm valve

Operation of Vacuflow® Float Controller

VACUUM

Sewa

ge le

vels

START

STOP

A3

2

D

1B

F

C

E

Pos. Name AmountNumber

1110987654321

sheet 2118091121 PVC clamp Ø63/Ø20 mm

Air inlet pipe Ø20 mmSheet 426 Socket Ø63 mm

Pipe Ø63 mmPipe Ø63 mm

Sheet 501 Discharge valve

9940100 Elbow5500301 Y-branch Ø63 mm

Sheet 510/511 3-way PVC ball valve

1111111

12

3

4

5

6

7

8

9

1011

SEE ALTERNATIVES

1

Turn to 90 °

Sheet 426 Socket Ø63 mm 12 or 3

+ nipple

1

Clamp with bracket Z Ø63

445

10

100130 80125

Varia

ble

ALTERNATIVE I. ALTERNATIVE II.

2

Varia

ble

min

. 160

Ø 63

Suction cycle starts, sewage enters via suction pipe (F) the systemand sewage level in the interface unit decreases. Float lowers tillrod (D) switches the Vacuflow starter valve (C) in closed position.Hereby the vacuum connection (1) goes in closed position, thePiston valve (A) shuts and connection (2) comes in open positionand atmospheric air enters via hose (E) the upper part of the Pistonvalve (A).

The whole mechanism/system goes to standby position and readyfor an other discharge cycle.

In the standby positionVacuum in system is continously present till Piston valve (A) and Vacuflow starter valve (B).

When float is at low level this is in rest position and the vacuumconnection (1) of the Vacuflow starter valve (B) remains in closed position and an open atmospheric air connection (2) via the hose (E) to the Piston valve (A) is present.

In the just switched positionWhen sewage enters the interface unit the float (C) with rod (D)will rise and at a certain level the rod (D) will switch the startervalve (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).

1st stageSewage flows via gravityinto the buffer pot.

2nd stageStart level is reached andVacuflow valve opened byfloat - switch.

3rd stageWater and air-mixtureis sucked from thebuffer pot.

4th stageStop level is reached andVacuflow valve closed byfloat - switch.

STOP LEVEL

START LEVEL

Air inlet

Startervalve

Piston valve closed

Piston valve opens

Startervalve

Piston valve open

Startervalve

Vacuflow valve is closed.

Piston valve closed

Startervalve

Vacuflow® valve with monitoring sensor

Vacuflow® 90mm valve with sensor mounted in HDPE interface pot

On site advanced interactive trouble shootingmonitorFor each individual vacuum network, a unique geographical planis made for the electronic touch screen, showing pot location,behaviour and eventual alarm.

Telemetry

Qua-Vac’s Aquatell Scada system for monitoring and cycle countingThe Aquatell software can contact the vacuum station by modemand import all station data. On this screen, the complete layout isshown with all vacuum mainlines and pots. Each pot has an uniquecode to indicate the location. Pot cycle counting is achieved by datalogging, showing opening and closing times of all pots throughoutthe day.

Vacuum Sewer System

Qua-Vac B.V.Televisieweg 1571322 BH AlmerePhone: +31 (0)36 546 1999Fax: +31 (0)36 535 0909E-mail: info@quavac.comWebsite: www.quavac.com

Numerous lift stations with their high capitalcost and maintenance requirements areutilized to offset excessive excavation andtrecnching costs.

Excavating in areas of high water table is expensive due to complicated and timeconsuming dewatering and trenchstabilization procedures.

Wide and deep trenches often make roadsimpossible to pedestrians and vehiculartraffic for long periods of time. Damage totrees and landscaping can be severe.

Exfiltration can contaminate thesurrounding area (aquifer, water source,lakes and rivers). Infiltration is a seriousproblem resulting in existing treatmentbecoming hydraulicaly overloaded and theimposition of compulsory over-sizing oftreatment plants under design.

Unforeseen obstructions such as water orsewer mains, large rocks, etc. usually resultin expensive field changes and linererouting.

200mm upto 400mm diameter concretepipe and vitrified clay pipe sewer main aretypical with material costs and excessive unit labor costs.

Non-continuos slope allows shallowtrenching to be used resulting in substantialexcavation cost savings and reducedinstallation time.

Eliminating and/or minimizes dewateringand trench stabilization problems.

Small diameter mains, installed just belowfrost level allow shallow and narrowtrenching thereby minimizing constructiontime and environmental disturbances.

Absolutely fail-safe - field tested andopertated under vacuum conditions. Abroken main, at worst, results in infiltration(easily detected) - never exfiltration.

Vertical lift capability allows unforeseenobstructions to be easily passed over, under,or around resulting in minimum delay andeliminating extra costs.

90mm upto 200mm diameter PVC or HDPEvacuum sewer mains are typical. Labor andmaterials costs for installing vacuum pipingare dramatically lower, compared to gravitysewers, due to labor and trenching costsassociated with smaller diameter vacuummain.

Vacuflow ®

Gravity system Vacuflow System

Advantages of the QUA-VAC Vacuflow ® System

Vacuum Sewer System

Qua-Vac B.V.Televisieweg 1571322 BH AlmerePhone: +31 (0)36 546 1999Fax: +31 (0)36 535 0909E-mail: info@quavac.comWebsite: www.quavac.com

Numerous lift stations with their high capitalcost and maintenance requirements areutilized to offset excessive excavation andtrecnching costs.

Excavating in areas of high water table is expensive due to complicated and timeconsuming dewatering and trenchstabilization procedures.

Wide and deep trenches often make roadsimpossible to pedestrians and vehiculartraffic for long periods of time. Damage totrees and landscaping can be severe.

Exfiltration can contaminate thesurrounding area (water source,lakes and rivers). Infiltration is a seriousproblem resulting in existing treatmentbecoming hydraulicaly overloaded and theimposition of compulsory over-sizing oftreatment plants under design.

Unforeseen obstructions such as water orsewer mains, large rocks, etc. usually resultin expensive field changes and linererouting.

200mm upto 400mm diameter concretepipe and vitrified clay pipe sewer main aretypical with material costs and excessive unit labor costs.

Non-continuos slope allows shallowtrenching to be used resulting in substantialexcavation cost savings and reducedinstallation time.

Eliminating and/or minimizes dewateringand trench stabilization problems.

Small diameter mains, installed just belowfrost level allow shallow and narrowtrenching thereby minimizing constructiontime and environmental disturbances.

Absolutely fail-safe - field tested andopertated under vacuum conditions. Abroken main, at worst, results in infiltration(easily detected) - never exfiltration.

Vertical lift capability allows unforeseenobstructions to be easily passed over, under,or around resulting in minimum delay andeliminating extra costs.

90mm upto 200mm diameter PVC or HDPEvacuum sewer mains are typical. Labor andmaterials costs for installing vacuum pipingare dramatically lower, compared to gravitysewers, due to labor and trenching costsassociated with smaller diameter vacuummain.

Vacuflow ®

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Advantages of the QUA-VAC Vacuflow ® System

Applications of the Qua-Vac Vacuflow®

System

Industrial AreasCustomer: Hyundai Heavy Industries Co. LTD.Location:South- Korea

Qua-Vac Vacufl ow 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 fl ow, some interface units are equipped with two or three 90mm valves.

Villa ParkCustomer: Nakheel Development CompanyLocation: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 fl ow.

QUA-VAC Interface Units Worldwide

Spain

France

Austria

United Kingdom

Bahrain

Dubai

South Korea

the Netherlands

MarinasTo 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.

Vacuflow® 63mm valve

Cross section of 63mm valve

Reclaimed IslandsCustomer: Ossis Property DevelopersLocation:Amwaj Islands – Bahrein, Middle-East

Six separate Qua-Vac Vacufl ow systems are implemented to serve the villas on these reclaimed islands in the Kingdom of Bahrain. The Vacufl ow 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 Vacufl ow system.

UNICEF - United NationsCustomer: UNICEF/ United NationsLocation: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 Vacufl ow sewer system. The supply included the complete ejector type vacuum stations and all pre-mounted HDPE vacuum interface units.

Interface valve unit

www.quavac.com

Qua-Vac B.V.

Televisieweg 1571322 BH AlmereThe Netherlands

Phone: +31 (0)36 546 1999Fax: +31 (0)36 535 0909E-mail: info@quavac.comWebsite: www.quavac.com