BS EN 849:1997- Transportable gas cylinders. Cylinder valves. Specification and type testing
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This European Standard specifies requirements for gas cylinder valves and the method of testing such valves, for type approval. This standard is applicable to valves to be fitted to gas cylinders, up to 150 l water capacity, intended to convey compressed, liquefied or dissolved gases. This standard is only applicable to valves operated by a hand wheel or a key. This standard is not applicable to valves for breathing equipment, fire extinguishers, cryogenic equipment or liquefied petroleum gas (LPG).