| Series | 
| 01 | 
Duplex filter with ball valve-switch-over, 40 bar | 
40FLDK | 
| Filter element | 
| 02 | 
with filter element according to DIN 24550 | 
N | 
| with filter element according to BRFS standard | 
without information | 
| Size | 
| 03 | 
FLDKN... (filter element according to DIN 24550) | 
0063 | 
| 0100 | 
| 0160 | 
| 0250 | 
| 0400 | 
| 0630 | 
| FLDK... (filter element according to BRFS standard) | 
0045 | 
| 0055 | 
| 0120 | 
| 0201 | 
| 0271 | 
| Filter rating in μm | 
| 04 | 
Nominal | 
Stainless steel wire mesh, cleanable | 
G10 | 
| G25 | 
| Paper, not cleanable | 
P10 | 
| Absolute (ISO 16889) | 
Non-woven glass fiber media, not cleanable | 
H3XL | 
| H10XL | 
| H20XL | 
| Pressure differential | 
| 05 | 
max. admissible pressure differential of the filter element | 
30 bar | 
A | 
| Element design | 
| 06 | 
Standard adhesive T = 100 °C | 
0… | 
| Standard material | 
...0 | 
| chemically nickel-plated | 
…D | 
| Solenoid | 
| 07 | 
without | 
0 | 
| Bypass valve | 
| 08 | 
without | 
0 | 
| 3.5 bar | 
7 | 
| Maintenance indicator | 
| 09 | 
Maintenance indicator, mech./visual, switching pressure 2.2 bar | 
V2,2 | 
| Port | 
| 10 | 
DIN flange | 
D0 | 
| Seal | 
| 11 | 
NBR | 
M | 
| FKM | 
V | 
| Material | 
| 12 | 
Standard | 
0 | 
| chemically nickel-plated | 
D 1) | 
| Supplementary information | 
| 13 | 
without | 
0 | 
| Certificate | 
Z 2) |