Mechanical Pressure switch with perbunan diaphragm
Pressure connector: I (G 1/2“ Female thread, DIN 1725/2), ALSi 12.
FF 4-2 VdS, typical alarm pressure switch. The setting range is limited to 1 bar
FF4-2VdS DRI, typical alarm pressure switch with manual reset
FF 4-10 VdS and FF 4-16 VdS pressure switches limit the differential to 1.5 bar maximum
All FF 4-... VdS used in fixed for water extinguishing systems, VdS-approved
|
Order reference |
Upper |
Lower switch point adjustable (bar) |
Smallest diff.* (bar) |
Max. operating pressure (bar) |
Max. test pressure (bar) |
Standard setting (bar) |
Part No. |
|---|---|---|---|---|---|---|---|
| FF 4-2 VdS DAI | 0,35 ... 1 | 0,25 ... 0,9 | 0,1 fest | 20 | 40 | 0,6 / 0,7 | 1020068 |
| FF 4-2 VdS DRI** | 0,5 ... 1 | 0,2 fest | 20 | 40 | ... / 0,7 | 1020070 | |
| FF 4-10 VdS DAI | 0,7 ... 10 | 0 ... 8,5 | 0,5 ... 1,5 | 40 | 40 | 4 / 5 | 1020080 |
| FF 4-16 VdS DAI | 1 ... 16 | 0,5 ... 15 | 0,8 ... 1,5 | 48 | 48 | 11 / 12 | 1020067 |
| **FF 4- 2 VdS DRI with manual reset | |||||||
