EVS-EN 12094-13:2001

This European Standard specifies the requirements and describes test methods for check and non-return valves for CO2 inert gas or halocarbon gas fire extinguishing systems.This standard is applicable to check valves installed between container valve and manifold and non-return valves installed in pilot lines, except those valves which are tested in combination with non-electrical control devices. Non-return and check valves allow the passage in the direction of flow and they prevent flow in the reverse direction.