For electric vehicles with fuel cells, hydrogen is used as energy source in many applications: forklifts, cars, buses, lorries or even rail vehicles. All of these hydrogen-powered vehicles operate CO2 neutral and, depending on the hydrogen technology used, have ranges comparable to vehicles with classic combustion engines.
The WALTHER hydrogen (H2) refueling system of the HG series is designed for high-pressure refueling of vehicles with gaseous hydrogen up to an operating pressure of 875 bar (700-bar technology). The design is optimized so that a high flow rate and a short refueling time of approx. three minutes is achieved with very low pressure drop.
The H2 refueling system is suitable for ULTRA COLD FILL at -40 °C and tested in accordance with SAE J2600-2002.
The high-pressure refueling system consists of a breakaway coupling, a hose set, a refueling nozzle and a parking station.
Using the Walther parking station with integrated purging function ensures high refueling frequency and thus eliminates inconvenient waiting time for de-icing.
Refueling nozzle 700 bar
H2 refueling nozzles of the HG series feature redundant locking technology and an additional pressure-activated safety lock. These features guarantee maximum safety during the refueling process.
The low-maintenance refueling nozzles, which are additionally protected by integrated dirt and moisture barriers, are easy to operate. A green ring, when visible, indicates that the nozzle is safely connected to the vehicle and ready for refueling.
Breakaway coupling 700 bar
The H2 refueling system includes a breakaway coupling. In the event the vehicle leaves the refueling station without disconnecting, the breakaway coupling reliably prevents damage to the system and uncontrolled leakage of H2.
The breakaway coupling of the WALTHER hydrogen refueling system is completely non-destructive, i.e. it has no predetermined breaking point. Therefore, operational readiness can be quickly and easily restored after an emergency separation. To do this, the line is depressurized using a ventilation tool and both sides of the separated breakaway coupling can simply be reconnected.
The parking stations for the WALTHER-H2 refueling nozzle have an integrated purging system (gaseous nitrogen or dried air). This prevents the refueling nozzle from freezing during refueling. An Integrated actuating system confirms when the nozzle is locked correctly in the parking station to make operation safe and easy.