
HD Preventer HD N9 & HD NLF9
Description
Double check valves/aerators with intermediate connection to the atmosphere. These non-return valves prevent the return flow of polluted water into the drinking water network and are suitable for laboratory taps, among other things. The HD N9/NLF9 must be placed vertically.The construction is the same as that of the HA S8C, but a second check valve is installed on the discharge side. The HD N9 is suitable for mounting under continuous pressure. The HD NLF9 is suitable for mounting after the shut-off valve, of which the downstream pipe section must be flexible and demountable, not continuously under pressure.
Technical Features
- Max. pressure: 10 bar.
- Max. temperature: 60 °C.
Part no.
Part number | Type | DN | Version | PU |
409003000 | HD N9 | 10 | brass 3/8" FF | 1 |
409003005 | HD N9C | 10 | chrome-plated brass 3/8" FF | 1 |
409003001 | HD NLF9 | 10 | chrome-plated brass 3/8" FM | 1 |