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Youngdo supplies a comprehensive range of high-pressure hydrogen cylinder valves engineered for hydrogen storage, refuelling stations and cylinder distribution. 13 models across the HC, HE, HK, HS, HSL, EP, DRV, YHT and YEX series, rated from 3 to 70 MPa. Certification varies by model (KGS, EC79, R134, IECEx and others) — see the product table.
70 MPa
13 (9 Series)
KGS · EC79 · IECEx (by model)
H₂ Storage & Distribution
70.0 MPa / 35.0 MPa
45 MPa
3.0 MPa
1 1/2"-12UNF, 9/16"-18UNF, M18x1.5P, M35x2.0P, PT1/4
9/16"-18UNF, M12x1.5P, 3/4"-20UNEF, Quick-On-Type, PT1/4
110°C ±5°C (where fitted)
105°C–110°C ±5°C (where fitted)
KS B 6214 / KGS AA311
EC79, ECE R134 (selected models)
IEC60079-0, 1, 18 / IECEx
CSEL, KHK (selected models)
13 Models across 9 Series — HC, HE, HK, HS, HSL, EP-70PA, EP-70PQ, EP-700PB, DRV-350, YHT-1514L, YHT-3516L, YHT-3516AL, YEX-1100
Ultra High Pressure
Working pressure up to 70 MPa for the most demanding hydrogen storage and distribution applications.
Thermally Activated Pressure Relief
Fuse metal and glass bulb elements vent gas when the valve is exposed to excessive heat. Both are fitted on the HC, HE, HK, HS, HSL, EP and DRV models; YHT models use a glass bulb only and the YEX-1100 has neither.
KGS Certification
KGS certification on 10 of the 13 models. Certification varies by model — see the product table.
EC79 & R134 Models
Selected models carry EC79 and UN ECE R134 approvals, the regulations for hydrogen vehicle components — see the product table.
Wide Thread Range
Multiple inlet and outlet thread configurations to match all standard cylinder and connection types.
Quick-Connect Option
DRV-350 quick-on-type outlet for fast and safe cylinder connection without tools.
Explosion-Proof
YEX-1100 rated to IEC60079 and IECEx for safe installation in hazardous hydrogen environments.
13 Model Range
13 models across nine series covering 3–70 MPa service, from the 3 MPa YEX-1100 to 70 MPa cylinder valves.
CSEL & KHK Models
CSEL and KHK certifications are listed on selected models — see the product table.
H₂ Ready
Designed for hydrogen gas service. Certification varies by model — see the product table.
Hydrogen Applications
Cylinder valves for hydrogen storage and distribution systems — please confirm suitability for your application when requesting a quote.
Technical Support
Our UK team can help confirm model suitability, certification and lead time for your application — contact us with your requirements.
70 MPa
Max Working Pressure
KGS · EC79
Certifications (by model)
IECEx
Explosion-Proof
13 Models
Product Range
H₂ Ready
Hydrogen Service
