Easytop backflow preventer with G-thread
Product information
Easytop backflow preventer with G-thread
for drinking water installation
| Year built (from): | 01.04.2017. |
Trade mark rights exist for this document; for further information, go to viega.com/legal .
Target groups
The information in this manual is directed at heating and sanitary professionals and trained personnel.
Individuals without the abovementioned training or qualification are not permitted to mount, install and, if required, maintain this product. This restriction does not extend to possible operating instructions.
The installation of Viega products must take place in accordance with the general rules of engineering and the Viega instructions for use.
Labelling of notes
Warning and advisory texts are set aside from the remainder of the text and are labelled with the relevant pictographs.
DANGER!
This symbol warns of possible life-threatening injury.
WARNING!
This symbol warns of possible serious injury.
CAUTION!
This symbol warns of possible injury.
NOTICE!
This symbol warns of possible damage to property.
INFO!
This symbol gives additional information and hints.
About this translated version
This instruction for use contains important information about the choice of product or system, assembly and commissioning as well as intended use and, if required, maintenance measures. The information about the products, their properties and application technology are based on the current standards in Europe (e. g. EN) and/or in Germany (e. g. DIN/DVGW).
Some passages in the text may refer to technical codes in Europe/Germany. These should serve as recommendations in the absence of corresponding national regulations. The relevant national laws, standards, regulations, directives and other technical provisions take priority over the German/European directives specified in this manual: The information herein is not binding for other countries and regions; as said above, they should be understood as a recommendation.
Standards and regulations
The following standards and regulations apply to Germany / Europe and are provided as a support feature.
Regulations from section: Fields of application
Scope / Notice | Regulations applicable in Germany |
|---|---|
Planning, execution, operation and maintenance of potable water installations | DIN EN 806, part 1 |
Planning, execution, operation and maintenance of potable water installations | DIN EN 806, part 2 |
Planning, execution, operation and maintenance of potable water installations | DIN EN 806, part 3 |
Planning, execution, operation and maintenance of potable water installations | DIN EN 806, part 4 |
Planning, execution, operation and maintenance of potable water installations | DIN EN 806, part 5 |
Planning, execution, operation and maintenance of potable water installations | DIN EN 1717 |
Planning, execution, operation and maintenance of potable water installations | DIN 1988 |
Planning, execution, operation and maintenance of potable water installations | VDI/DVGW 6023 |
Planning, execution, operation and maintenance of potable water installations | Trinkwasserverordnung (TrinkwV) |
Regulations from section: Media
Scope / Notice | Regulations applicable in Germany |
|---|---|
Suitability for drinking water | Trinkwasserverordnung (TrinkwV) |
Regulations from section: Product description
Scope / Notice | Regulations applicable in Germany |
|---|---|
Suitability for drinking water installations | Trinkwasserverordnung (TrinkwV) |
Suitability for drinking water installations | DIN 50930‑6 |
Requirements in plastic components in drinking water installations | DVGW-Arbeitsblatt W270 |
Regulations from section: Overview
Scope / Notice | Regulations applicable in Germany |
|---|---|
Compliance with the inspection requirements (fittings group I) | DIN EN 1213 |
Regulations from section: Marking on components
Scope / Notice | Regulations applicable in Germany |
|---|---|
Designation noise class I | DIN EN 1213 |
EA marking for classification | DIN EN 1717 |
Regulations from section: Compatible components
Scope / Notice | Regulations applicable in Germany |
|---|---|
G-external threads | DIN EN ISO 228 |
Regulations from section: Corrosion
Scope / Notice | Regulations applicable in Germany |
|---|---|
External corrosion protection | DIN EN 806‑2 |
External corrosion protection | DIN 1988‑200 |
External corrosion protection | DKI-Informationsdruck i. 160 |
Regulations from section: Leakage test
Scope / Notice | Regulations applicable in Germany |
|---|---|
Leakage test for potable water installations | DIN EN 806, part 4 |
Leakage test for potable water installations | ZVSHK-Merkblatt |
Regulations from section: Maintenance
Scope / Notice | Regulations applicable in Germany |
|---|---|
Operation and maintenance of potable water installations | DIN EN 806‑5 |
Intended use
INFO!
Coordinate the use of the model for areas of use and media other than those described with the Viega Service Center.
Areas of use
Use is possible in the following areas among others:
Drinking water installations
Industrial units
The general rules of engineering and the applicable regulations must be observed for planning, execution, operation and maintenance potable water installations, see Regulations from section: Fields of application .
Media
The model is also suitable for the following media, amongst others:
Drinking water without limitations acc. to the applicable directives, see Regulations from section: Media
maximum chloride concentration 250 mg/l pursuant to applicable regulations, see Regulations from section: Media
Product description
According to the applicable regulations, Easytop system fittings can be used for all types of potable water and are DVGW certified, see Regulations from section: Product description . Their plastic components comply with the KTW recommendation and the requirements pursuant to the applicable regulations.
Overview
INFO!
The Easytop system fittings comply with the test requirements specified in the applicable regulations, see Regulations from section: Overview . Sound protection Lap≤ 20 dB(A)
The model is equipped as follows:
valve casing made of gunmetal/silicon bronze
valve top made of gunmetal/silicon bronze (dead space free)
dual-sided G external thread
valve seat and valve plate unit made of stainless steel
backflow preventer (BP)
- Entleerungs- / Prüfstopfen
drainage / testing plugs G¼ upstream and downstream from the backflow preventer
key surface on the casing
valve and spindle seal made of EPDM (maintenance-free)
Backflow preventer
The model is fitted with a backflow preventer.
Backflow preventers only allow flowthrough in one direction (in the direction of flow). If the direction of flow changes, e.g. due to back suction, the backflow preventers close automatically.
DN |
|---|
G |
15 | 20 | 25 | 32 | 40 | 50 |
¾ | 1 | 1¼ | 1½ | 1¾ | 2⅜ |
Threaded connection
Only flat sealing connection screw fittings may be used for the threaded connection.
Markings on components
The model is marked as follows:
flow direction indicator
noise class I pursuant to applicable regulations, see Regulations from section: Marking on components
dimension
DVGW writing
EA marking for classification in accordance with the applicable regulations, see Regulations from section: Marking on components
Compatible components
The model is equipped with G-external threads according to the applicable regulations and compatible with the Profipress, Sanpress, and Sanpress Inox system, see Regulations from section: Compatible components .
Operating mode
Combined backflow preventer (CBP)
Backflow preventers protect fittings and installation systems against unintended backflow, back pressure or back suction of the contaminated wastewater or dirty water in the piping system. This can occur after pressure fluctuations in the distributor circuit, which can cause a change in the direction of flow.
The backflow preventer prevents the pushing back, backflow or back suction of liquids, which may be a health hazard, into the public drinking water network, with the help of a spring-loaded valve cone. The dimension is dependent on the peak pressure and it complies with the nominal width of the pipeline. The backflow preventer must be fitted with testing equipment.
In many countries, standards and technical guidelines stipulate the use of backflow preventers or other suitable safety equipment that protect drinking water against contamination.
Technical data
Observe the following operating conditions for the installation of the model:
Operating temperature [Tmax] |
|---|
Operating pressure [Pmax] |
90 °C |
1.6 MPa (16 bar) |
The performance diagram shows the pressure losses (in hPa) in relation to the volume flow and the nominal width.
Information for use
Corrosion
Overground pipelines and fittings in rooms do not normally require external corrosion protection.
There are exceptions in the following cases:
Contact with aggressive building materials such as nitrite or materials containing ammonium
in aggressive surroundings
If external corrosion protection is required, observe the pertinent guidelines, see Regulations from section: Corrosion .
INFO!
Easytop fittings made of gunmetal/silicon bronze are suitable for all types of potable water.
The chloride concentration in the medium must not exceed a maximum value of 250 mg/l.
This chloride is not a disinfectant, but in fact pertains to the content in sea and table salt (sodium chloride).
Optional accessories
The following optional accessories are available:
Drainage valve
Extension for drainage valve when using an insulating shell
Insulating shells
Insulating shells
EPS insulating shells are available for all sizes of valves. The two-piece shells are self-securing and mounted with tools and holding clamps: they connect seamlessly onto the flat surface of the pipe insulation. When installing a drainage valve or an extension with drainage valve, a predetermined breaking point is broken out of the insulating shell.
Handling
Assembly information
Mounting instructions
Checking system components
INFO!
Do not remove the model from the packaging until immediately before use.
System components may, in some cases, become damaged through transportation and storage.
Check all parts.
Replace damaged components.
Do not repair damaged components.
Contaminated components may not be installed.
During assembly
Observe the following when mounting:
flow direction indicator
use suitable tools
When tightening the connection screw fitting, counter by holding the key surface of the valve.
INFO!
Choose the place of installation so that the fitting is easily accessible, simple to operate and the insulating shell can be well mounted.
Laying and fixing pipes
For information, refer to the instructions for use of the Viega system of the product you are using.
Length expansion
For information, refer to the instructions for use of the Viega system of the product you are using.
Maintenance
NOTICE!
Inform your customer or the operator of the drinking water installation that the system has to be maintained on a regular basis.
Observe the applicable regulations for the operation and maintenance of drinking water installations, see Regulations from section: Maintenance .
INFO!
Viega recommends actuating the fitting regularly and checking its function.
Replacing the valve top
If the valve top needs to be replaced, model 2239.22 can be used.
Disposal
Separate the product and packaging materials (e. g. paper, metal, plastic or non-ferrous metals) and dispose of in accordance with valid national legal requirements.