Watts BA 009MC Manuale utente

wattswater.fr

BA 009MC

DN65 to 250mm

Installation manual

Installation and Operation Manual

Manuale di Installazione e Uso

Manuel d’Installation et d’Utilisation

Installatie- en bedieningshandleiding

Installations- und Bedienungsanleitung

Manual de instalación y funcionamiento

Руководство по монтажу и эксплуатации

Instrukcja instalacji i obsługi

Installations- og betjeningsvejledning

Installations- och bruksanvisning

Index

General information 3

General

Fields of application

Technical specifications

Standards - Approval

1. Operating principle 3

1.1 Operating principles

1.2 Malfunctions

2. Installation instructions 5

2.1 Installation

2.2 Commissioning

2.3 Filling with water

3. Nomenclature and sizing 6

3.1 Testing kit

3.2 Fitting/removal instructions

3.3 Refitting instructions

3.4 Repair kits

4. Troubleshooting 8

General

Designed to protect drinking water supply networks against

the backflow of risk fluids up to category 4 according to NF

EN1717.

The device is designed to prevent any backflow of polluted

water into the drinking water supply network as a result

of back pressure or back siphonage when the pressure

upstream of the device is lower than the pressure downstream

of it.

Fields of application

For systems liable to generate pollution risks:

• Sanitary networks: hospitals, laboratories,

dialysis centres, water treatment.

• Technical networks: heating, air conditioning, irrigation,

water dispensers.

• Fire suppression systems: sprinklers, fire hoses.

• Professional networks: industrial facilities,

surface treatment, chemical industry, agrifood.

• Temporary networks: water supply for trade fair stands,

festivals, exhibitions.

Note: The applications also depend on legislation in the

country of use. Please contact your national authorities

for further information.

Technical specifications

Type of fluid: clears water

Operation: horizontal position

DN 65 to 250 mm, Connections : drilled flanges

Maximum operating pressure: 10 bar (1 MPa)

Minimum inlet pressure: 1.5 bar (150 KPa)

Maximum operating temperature: 65°C

Standards - Approval

Conforms to the following standards: EN1717, EN12729

1. Operating principle

The backflow preventer with verifiable reduced pressure zone

includes:

• three zones: upstream, intermediate and downstream, each

equipped with a pressure measuring device.

• two independent check valves, separating the intermediate

zone.

• one automatic relief device connected to the intermediate

zone to restore it to atmospheric pressure in the event of a

failure.

This device is installed with a funnel with air gap.

Maintenance and accessibility of the internal components are

facilitated by the modular design of the replacement parts.

UPSTREAM

DOWNSTREAM

INTERMEDIATE CHAMBER

2nd

VALVE

1st

VALVE

RELIEF VALVE FUNNEL

ACS

BELGAQUA

Kiwa UK-REG 4

There can be no inversion or uctuations of pressure between the intermediate chamber and the circuit upstream of the backow

preventer. The construction of the device in accordance with standards requires the upstream pressure to remain 140 mbar higher

than the pressure in the intermediate chamber at all times. This differential value controls the opening of the relief valve and the

drainage of the backow preventer. Backow preventers with veriable reduced pressure zones self-protect against their own

malfunctions. The device is made safe in static pressure situations.

The following situations can arise:

1.1 Operating principles

1.2 Malfunctions

UPSTREAM

NEGATIVE

PRESSURE /

BACK-SIPHONAGE

The two check

valves close.

The relief valve

opens and drains

the intermediate

chamber.

OVERPRESSURE

WITH

DOWNSTREAM

VALVE SEALED

If the check valve is

perfectly sealed, no

malfunction will occur:

the valve remains

closed.

NORMAL FLOW CONDITIONS > FILLING / FLOW

START

The two check valves are opened. The relief valve is

closed (closing pressure is lower than the upstream

check valve opening pressure). Water is supplied to the

downstream chamber.

NO FLOW CONDITIONS > FLOW INTERRUPTION

The two check valves are closed. The relief valve is closed

(because the pressure required to close it is lower than

the pressure required to open the upstream check valve).

NO FLOW WITH

UPSTREAM VALVE

DEFECTIVE

The upstream

pressure increases

the pressure in the

intermediate chamber.

The relief valve

opens and causes a

continuous discharge.

OVERPRESSURE

WITH

DOWNSTREAM

CHECK VALVE

DEFECTIVE

The overpressure

reaches the

intermediate chamber

causing the relief valve

to open and discharge

into the sewage

network.

2.1 Installation

Before installing the BA backflow preventer, check that:

• The BA device must be easily accessible to allow inspection,

maintenance and replacement of defective components

• Test points must be provided to enable the system to be

tested without difficulty

• It must not be installed in areas subject to flooding

• It must be installed in a ventilated area (non-polluted

atmosphere)

• The relief system must be capable of discharging the relief

flow

• It must be protected against frost and extreme temperatures

• It must be installed horizontally with the relief port facing

down

• The funnel, with air gap, must be connected to the relief

network

• It can only be used for potential backflow not exceeding the

relief capacity

The protection device must be installed by a qualified technician.

2.2 Commissioning

1. Flush and fully drain the upstream pipes before installing the

BA protection device with its accessories.

2. Install the BA protection device with its accessories, in the

direction of flow, as follows:

• Upstream: one type SOCLA or equivalent Butterfly valve,

• Between the upstream valve and the device: one type Socla

Y333P or equivalent mesh strainer with drain cock.

• Downstream: one type Socla or equivalent Butterfly valve.

Adhere to the installation diagram below:

The protection system must be assembled without forcing

the inlet and outlet fittings

3. Fit the funnel on the BA protection device. It is designed

to be connected to a pipe (e.g. PVC discharge pipe) with

external diameter equal to the diameter shown (see øF).

2.3 Filling with water:

During filling with water:

• The upstream and downstream valves are closed,

• Open the upstream valve slowly, to bring the BA protection

system up to pressure gradually,

• Open and close tap No. 1 and then taps 2 and 3

respectively to drain the BA protection device,

• Open the downstream valve slowly, to commission the BA

protection system.

Once the BA protection system has been commissioned, it:

• Ensures that the downstream water requirement is met

• Protects the upstream network against the risk of pollution

PRECAUTIONS:

• In the case of an upstream diversion in the area right in

front of the backflow preventer, it is necessary to install

a check valve between the diversion and the backflow

preventer.

2. Installation instructions

123

Set of protection BA009MC

REF

DN H LT ØF

mm mm mm mm

2231722MCK

65 247,34 740 40

2231822MCK

80 270,51 844 40

2232300MCK

100 352,52 986 60

2232400MCK

150 405,06 1224 60

2232500MCK

200 485,7 1485 60

2232600MCK

250 485,7 1631 60

Watter

supply

inlet

Internal

Distribution

Celling, vault, beam...

Ground, oor, walkway

Sever

conduit Drain

ØF 0,5 mini

1,5 maxi

Passage :

distance adapted to

maintenance operations

Key

1 - Casing

2 - Outlet drain holder

3 - Hex head screw

4 - Union nut

5 - Draining valve seat

6 - Discharge valve spring

7 - Discharge valve

8 - Upstream check valve

9 - Retainer

10 - Draining valve stem

11 - Downstream check valve

12 - Membrane disc

13 - Safety seal

14 - Draining valve head

15 - Draining valve seat and cover

16 - Cover

17 - Test cock chain

18 - Protective head

19 - Eye bolt

20 - Screw

21 - Test cock M 1/2“ Gas

22 - Draining valve head seal

23 - Membrane

3. Nomenclature and sizing

In accordance with national statutory

regulations, BA backflow preventers must

be regularly inspected (once a year in most

countries) by an authorised maintenance

technician.

BA backflow preventers must undergo

compulsory annual testing using test

equipment conforming to NF P43-018,

such as Socla ref. 2234900M2 or

equivalent.

This equipment must be checked at least

once every two years.

*DN200-250

For the disman-

thing, two outlet

M10 threadings

are provided on

the seats.

DRAINING VALVE ASSEMBLY A

3.2 Fitting / removal instructions

3.1 Testing kit

All components of the backﬂow preventer can be checked or replaced on site without removing the entire device.

• Stop the ﬂow by closing the upstream and downstream stop valves.

• Drain the backﬂow preventer by opening the upstream test cock.

• Remove the screws (20) of the cover (16).

• Separate the cover (16) from the casing (1). If necessary, in case the cover gets stuck, insert any cover screw (20) into the ad-

ditional hole of the cover until the cover is free.

• Take out the draining valve assembly A from the casing (1).

Remove the check valves:

• Remove the retainers (9) using pliers.

• Remove the 1st check valve (8) : introduce a rod on the inlet side, and gently hit the check valve. Repeat the same operation for the 2nd

check valve (9) (11).

Remove the relief valve seat:

The seat (5) of the draining valve is tted in piston position on the bottom of the casing (1), take it out:

• By hands through the internal side of the body if possible

• By pushing in direction of the body inside through the discharge hole using a screwdriver.

3.3 Refitting instructions

3.4 Repair kits

DN A B C D E F

Max.

acceptable

torques *

”mm mm mm mm mm mm mm Nm

2 1/2 65 185 356 155 326 63 180 40

380 200 440 173 337 63 200 40

4100 220 530 201 434 80 255 40

6150 285 630 230 456 80 310 110

8200 340 763 272 499 80 390 300

10 250 395 763 272 499 80 390 300

* Maximum torque for tightening bolts of the backflow preventer cover

CAUTION: during the assembly, Silicone grease will have to be applied on O-rings.

Replace the check valve

• Introduce the 1st check valve in its bore (8) (9). Then using a lever (bottom part placed in the relief valve bore) and a plastic

wedge, push the subset to replace it.

• Important: take care that the relief valve seat is removed

• With the same method, mount the second check valve.

Replace the relief Valve

• Mount the relief valve seat in its bore . If necessary, push it using a plastic rod.

• Place the relief valve spring on the seat (5).

Before the ﬁnal operation, carefully dry the surfaces (body – cover) in contact with the membrane. If the membrane is assembled

for a second time, apply talcum powder on it.

• On the working station, place the relief valve unit in the cover.

Take care of the membrane orientation

• Turn the subset and place the screws on the cover.

• Take the unit and carefully position the relief valve in the spring then in the seat.

IMPORTANT: angular movements have to be as smallest as possible.

Tight the screws to the following torques: DN65 : 80 mN - DN80 : 90 mN - DN100 : 130 mN

Replace the outlet drain holder (2)

• The outlet drain holder is maintained on the casing by bolts and nuts. When replacing it, remove the screws from a groove on the casing.

• Then manually screw it until it reaches the draining valve (10).

Speciﬁcation for DN200 and DN250:

• Dismantling of the upstream and downstream check valves: insert two screws into the upstream and downstream threaded (M10)

in order to remove the upstream and downstream subset out of their own bore. Then remove them from the body.

• Reassembling of the new subset (upstream and downstream check valve): introduce the ﬁrst subset in the body bore, then with a

lever into the low part of the body (draining valve seat removed), push the subset to replace it.

• Remark: the upstream seat is equipped with an external notch with must be placed in the low part of the body. Do not forget to

replace the two safety seals (13). Reassembling the draining valve seat (5) and the spring (6).

Repair kits are available and make it possible to replace the specic defective part on the BA 009MC backow preventer

BA 009MC

4. Troubleshooting

PROBLEM POSSIBLE CAUSE ACTION

1. Rapid discharge of water through the

relief valve followed by normal operation Pressure uctuation in the upstream water supply

network None

2. Continuous discharge of water

through the relief valve in the course of

normal operation The relief valve is dirty or damaged Clean or replace the relief valve module

3. Continuous discharge of water

through the relief valve in safe mode

(normal ow or no ow)

a. The upstream valve is dirty or damaged

b. The piston seal of the relief valve is dirty or damaged

c. The downstream valve is dirty or damaged

a. Clean or replace the upstream valve

b. Clean or replace the relief valve module

c. Clean or replace the downstream valve

B C

Repair kits for BA 009MC Backﬂow Preventer

Complete kit

Draining valve assembly (A), First check module (B), Second check module (C),

Draining valve seat (cover) (D), Draining valve seat (body) (E)

60-65 2"1/2 2231722MCK

80 3" 2231822MCK

100 4" 2232300MCK

1500 6" 2232400MCK

200 8" 2232500MCK

250 10" 2232600MCK

Indice

Informazioni generali 3

Note generali

Campi di applicazione

Caratteristiche tecniche

Norme - Omologazione

1. Principio di funzionamento 3

1.1 Principi di funzionamento

1.2 Malfunzionamenti

2. Istruzioni per l’installazione 5

2.1 Installazione

2.2 Messa in servizio

2.3 Messa in acqua

3. Nomi dei componenti e dimensionamento 6

3.1 Kit di controllo

3.2 Istruzioni di montaggio/smontaggio

3.3 Istruzioni per il rimontaggio

3.4 Kit di riparazione

4. Risoluzione dei problemi 8

Note generali

Progettato per proteggere le reti di distribuzione di acqua

potabile dal riflusso di fluidi pericolosi fino alla categoria 4, in

conformità alla normativa NF EN 1717.

Il dispositivo è progettato per impedire il riflusso di acqua

contaminata nella rete di distribuzione di acqua potabile

dovuto a contropressione o sifonaggio, quando la pressione a

monte del dispositivo è inferiore a quella a valle.

Campi di applicazione

Impianti che possono provocare rischi di inquinamento:

• Reti sanitarie: ospedali, laboratori, centri di dialisi,

trattamento dell’acqua.

• Reti tecniche: riscaldamento, climatizzazione, irrigazione,

fontanelle.

• Reti anti-incendio: sprinkler, naspi.

• Reti professionali: impianti industriali, trattamenti superficiali,

settore chimico, settore alimentare.

• Reti provvisorie: collegamenti per stand fieristici, festival,

esposizioni.

Nota: le applicazioni dipendono anche dalle norme in

vigore nel paese di utilizzo. Per ulteriori informazioni

contattare le autorità nazionali preposte.

Caratteristiche tecniche

Tipo di fluido: acque chiare

Funzionamento: posizione orizzontale

DN da 65 a 250 mm, attacchi: flange forate

Pressione max. di esercizio: 10 bar (1 MPa)

Pressione in ingresso min.: 1,5 bar (150 KPa)

Temperatura max. di esercizio: 65°C

Norme - Omologazione

Conforme alle seguenti norme: EN1717, EN12729

1. Principio di funzionamento

Il disconnettore a zona di pressione ridotta controllabile è

costituito da:

• tre camere (a monte, intermedia, a valle), ciascuna dotata di

una presa di pressione;

• due valvole di ritegno indipendenti che separano la camera

intermedia;

• una valvola di scarico automatica collegata alla camera

intermedia per la messa in pressione atmosferica in caso di

guasto.

Il dispositivo è provvisto di un imbuto con intercapedine d’aria.

La manutenzione e l’accessibilità dei componenti interni sono

facilitate dal design modulare delle parti di ricambio.

A MONTE

A VALLE

CAMERA INTERMEDIA

SECONDA

VALVOLA DI

RITEGNO

PRIMA

VALVOLA DI

RITEGNO

VALVOLA DI

SCARICO IMBUTO DI

SCARICO

ACS

BELGAQUA

Kiwa UK-REG 4

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