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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, EP, DRV, YHT and YEX series — rated up to 70 MPa with KGS, EC79, R134 and IECEx certification.
70 MPa
13 Series
KGS · EC79 · IECEx
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
105°C–110°C ±5°C
KS B 6214 / KGS AA311
EC79, ECE R134
IEC60079-0, 1, 18 / IECEx
CSEL, KHK, R134, CSEL
13 Models — 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.
Dual Safety Devices
Fuse metal and glass bulb temperature safety devices provide redundant protection against overpressure.
KGS Certified
Full KGS certification to KS B 6214 and KGS AA311 for compliance with Korean and international gas standards.
EC79 & R134 Approved
European EC79 and ECE R134 approvals for hydrogen vehicle and refuelling station applications.
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
Comprehensive range of 13 models covering 35–70 MPa service across all hydrogen cylinder applications.
CSEL & KHK Approved
Additional CSEL and KHK certifications for Japanese and specialist market requirements.
H₂ Ready
Designed and certified specifically for hydrogen gas service — not adapted from general gas valve designs.
Proven Track Record
Youngdo valves are deployed globally in hydrogen refuelling stations and high-pressure cylinder systems.
Fast Lead Times
Stock availability across the range for rapid dispatch to UK, European and global projects.
70 MPa
Max Working Pressure
KGS · EC79
Certifications
IECEx
Explosion-Proof
13 Models
Product Range
H₂ Ready
Hydrogen Service