This International Standard specifies design, type testing and marking requirements for cylinder valves incorporating residual pressure devices hereinafter referred to as residual pressure valves (RPVs). This International standard applies to the following types of RPVs: a) cylinder valves intended to be fitted to refillable transportable gas cylinders; b) main valves (excluding ball valves) for cylinder bundles; c) cylinder valves or main valves with integrated pressure regulator (VIPR); d) valves for pressure drums and tubes; which convey compressed or liquefied gases. This International Standard does not apply to RPVs for portable fire extinguishers, cryogenic equipment or liquefied petroleum gas (LPG).