Backflow prevention device
Function
The backflow prevention device is used to ensure drinking water quality in the entire pipe network by preventing non-potable water flowing back from outside/another network. Non-drinking water can flow back if there are pressure changes within the water supply networks which lead to a change in
flow direction.
The backflow prevention device installed between a public water supply network and private consumer network creates a safe separation zone and ensures that water from one network does not come into contact with water from the other network.
SERIES 574 with thread
- Backflow preventer with controllable medium pressure zone acc. EN 1717
- DN ½” – 2″, PN 10
- Maximum working temperature 65°C
- Connections ½” – 2″ external thread fittings
SERIES 575 with flange
- Backflow preventer with controllable medium pressure zone acc. EN 1717
- DN 50 – 250, PN 10
- Maximum working temperature 65°C
- Connections suitable for counter flange acc. EN 1092-1
SERIES 574 with thread
- Body and cover made of dezincification resistant brass CR EN 12165 CW602N (DN ½” – 1¼”) or cast iron DIN 50930-6 RG 5 Pb3 (DN 1½” – 2″)
- Rods and springs made of stainless steel
- Seals made of EPDM
SERIES 575 with flange
- Body and cover made of cast iron DIN 50930-6 RG 5 Pb3, from DN 150 made of ductile iron, epoxy powder coated
- Rods, springs and spring seat made of stainless steel
- Seals made of EPDM
Manfred Wagner
- Head of control valves
Thomas Neuhold
- Sales control valves
Technical specifications
| Item number | Type | Nominal size | Pressure | Length [mm] | Weight [kg] |
|---|---|---|---|---|---|
| S58574015C | 574 | DN 1/2" | 10 | 130 | 0,9 |
| S58574015 | 574 | DN 1/2" | 10 | 227 | 2,9 |
| S58574020 | 574 | DN 3/4" | 10 | 227 | 2,9 |
| S58574025 | 574 | DN 1" | 10 | 280 | 4,7 |
| S58574032 | 574 | DN 1 1/4" | 10 | 280 | 4,7 |
| S58574040 | 574 | DN 1 1/2" | 10 | 387 | 11,3 |
| S58574050 | 574 | DN 2" | 10 | 387 | 11,4 |
| S58575050 | 575 | DN 50 | 10 | 302 | 13,2 |
| S58575065 | 575 | DN 65 | 10 | 305 | 17,0 |
| S58575080 | 575 | DN 80 | 10 | 470 | 26,5 |
| S58575100 | 575 | DN 100 | 10 | 470 | 28,0 |
| S58575150 | 575 | DN 150 | 10 | 600 | 103,0 |
| S58575200 | 575 | DN 200 | 10 | 780 | 111,0 |
| S58575250 | 575 | DN 250 | 10 | 930 | 142,0 |
Subject to changes
