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Youngdo supplies a comprehensive range of industrial gas cylinder valves across 7 application categories — tapered and unified inlet thread valves, non return valves, acetylene, chlorine/ammonia, tube trailer and piping connection valves. Certification (KGS, KS) and design standards (CGA, BS 341, ISO 10297) vary by model — see the product table.
25 MPa (Tube Trailers)
7 Application Types
KGS · KS (by model)
Industrial Gas Cylinders
11.8 – 19.6 MPa
11.8 – 25 MPa (1800 – 2400 psi ≈ 12.4 – 16.5 MPa on CGA models)
11.76 – 20 MPa
420 – 500 psi / 2.9 – 3.4 MPa
1.3 – 1.76 MPa (KGS models); 500 psi ≈ 3.4 MPa (CGA 820 models)
17.2 – 25 MPa
14.7 – 19.6 MPa
W28, W28.8 (25E), W39, 3/8-18 NGT, 3/4-14 NGT, 1-11 1/2 NGT, 1.125-12 UNF, 0.750-16 UNF, BS 341, PF 3/4
W22-14th, W23-14th, W26-14th, W22.5-14-LH, CGA 200/320/326/350/510/520/540/580/820, BS 341, DIN477, UNI 11144
KGS AA311, KS B 6214, CGA V-1, CGA V-9, BS 341, ISO 10297, DIN477, UNI 11144 (varies by model)
KGS, KS (varies by model — see the product table)
7 — Tapered, Unified, Non Return, Acetylene, Chlorine/Ammonia, Tube Trailers, Piping
Tapered Inlet Thread Series
YOC, YRH, YHC, YCC series with W28 and 3/4-14 NGT inlet threads for standard industrial gas cylinders.
Unified Inlet Thread Series
NH, NH6 and YKC series. NH6 and YKC models use 1.125-12 UNF or 0.750-16 UNF inlets; NH models use 3/4-14 NGT (tapered), BS 341 or W28.8 inlets — check the inlet thread for each model.
Non Return Valves
RP1 and HR series non-return valves with check valve closing off pressure rated to 0.3 MPa for safe backflow prevention.
Acetylene Service
YAC series dedicated acetylene cylinder valves, with CGA V-9, CGA V-1, CGA S-1.1 and ISO 10297 listed as design standards on most models — see the product table.
Chlorine & Ammonia
YCL and YMC series valves rated for chlorine and ammonia service with CGA 820 outlet connections.
Tube Trailers
YHT and YHET series high-pressure tube trailer valves rated to 25 MPa with W39-12th inlet threads.
Piping Connection
YXG series piping connection valves rated to 19.6 MPa for industrial gas distribution pipeline service.
KGS & KS Models
KGS certification on selected models, and KS on selected W28 inlet models, to KGS AA311 and KS B 6214. Certification varies by model — see the product table.
CGA Standards
CGA V-1, V-9 and S-1.1 are listed as design standards on CGA-outlet models for North American cylinder compatibility.
BS 341 Connections
Selected NH and RP1 models with connections to BS 341 for UK industrial gas cylinder applications.
ISO 10297 Models
ISO 10297 is listed as a design standard on selected NH, NH6, RP1 and YAC models — see the product table.
Technical Support
Our UK team can help confirm model suitability, certification and lead time for your application — contact us with your requirements.
25 MPa
Max Working Pressure
KGS · KS
Certifications (by model)
BS 341 · ISO 10297
Standards (selected models)
7 Categories
Application Range
Youngdo
Manufacturer
