Applications
Hydrogen refuelling is the most demanding gas-handling duty in commercial service. A 700 bar dispensing circuit combines extreme pressure, hard cycling, pre-cooling to −40°C, and the smallest molecule in industry — and every component in it has to be qualified for all four at once.
Hiflux UK supplies HIFLUX valves, fittings and manifolds developed specifically for hydrogen station duty, backed by the manufacturer's certification and hydrogen specialisation.
700 bar
Dispensing pressure
−252 °C
Fitting low limit
KS certified
H70 manual valves
01
A dispenser pressurises and depressurises many times a day. A component rated for a static working pressure is not the same as one qualified for repeated pressurisation to it, which is why cycle behaviour and seal type matter more here than headline pressure rating.
Hydrogen escapes through paths that hold tight against nitrogen or helium. Metal-to-metal cone and thread connections are preferred over preload-dependent compression joints for exactly this reason.
Pre-cooling circuits operate well below ambient. HIFLUX fittings carry an operating range down to −423°F (−252°C), covering both pre-cooled gaseous and liquefied hydrogen conditions.
Austenitic stainless steel is the default for gaseous hydrogen. HIFLUX components are cold-formed stainless steel 316 as standard.
02
HIFLUX Co., Ltd holds KS certification for manual valves for hydrogen refuelling stations, awarded by the Korea Gas Safety Corporation (KGS) in October 2023 (certificate KGS-23-0003). The certificate covers the H70 manual valve to KS B ISO 19880-3:2018 (Hydrogen gas-charging station, Part 3: Valves) in four sizes from 1/4" to 3/4": models HRS-NV20VS04-S, HRS-NV20VS06-S, HRS-NV20VS09-S and HRS-NV20VS12-S. Its valves are in service at hydrogen refuelling station sites. In 2024 the company was designated a Hydrogen Specialist Company by Korea's Ministry of Trade, Industry and Energy. Its H70 valve and fitting programme for 700 bar refuelling stations began in 2020, and it has been a member of the Korea Hydrogen Industry Association since 2019.
Hiflux UK is a member of the Hydrogen Energy Association.
03
| Component | Application |
| Hydrogen Fuel Station Needle Valve (HRS-NV) | Manual isolation, developed specifically for refuelling station duty |
| High-pressure needle valves | Isolation and throttling across storage and compression |
| Check valves | Backflow prevention between compression stages |
| Air operated valves | Remote and automated isolation |
| Safety head and rupture disc | Overpressure protection on storage banks |
| Relief valves | Factory-set, field-adjustable and proportional |
| Cone and thread fittings | Elbow, tee and cross bodies to 150,000 psi |
| Tube and nipples | Dispensing, pre-cooling and interconnect runs |
| Manifold blocks | Multi-port distribution on storage banks |
All in cold-formed stainless steel 316, with alternative alloys available on request.
