The valve 6440 is a servo-assisted piston valve. The stopper and the core guide tube are welded together to increase pressure resistance and leak-tightness. The coils are moulded with highly chemically resistant epoxy. Sliding rings increase the service life for dry gases. Cartridge and flange connections, and solenoids with automotive plugs (IP6K9K), are available for optimised use in fuel cells.
| Seal | EPDM |
| Housing | Stainless steel 1.4404/316L |
| Internal leakage rate | 1 x 10 - 4 mbar l/s (> 1.5 bar differential pressure) |
| External leakage rate | 1 x 10 - 4 mbar l/s |
| Pressure level | DN 6/DN 8: PN 40 bar |
| Burst pressure | > 250 bar for flange and threaded body |
| Orifice | DN 6, DN 8, DN 12, DN 16 |
| Thermal insulation class | Epoxy coil class H |
| Duty cycle | 100 % continuous operation |
| Mobile applications | 12 V: 9 V…16 V |
| Stationary applications | ± 10 % |
| Medium temperature | - 40 °C…+ 90 °C |
| Viscosity | Max. 21 mm2/s (21 cSt) |
| Electrical connection | Plug contacts according to DIN EN 175 301 - 803 form A for cable plug Type 2518 . |
| Ambient temperature | - 40 °C…+ 55 °C/+ 75 °C for stationary applications depending on performance level |
| MOQ | 1 |