Non-return valves, safety relief valves and pop up action valves are three prime components that help LPG handling or processing machines to deliver their output in a safely manner. These three elements complete our Gas Safety Devices range. They are made from brass, stainless steel and tungsten metal to enable them last decades without any repairing or replacement. These have small holes for the screws to have proper installation on LPG systems and pipelines. The offered Gas Safety Devices have a small lever through which the workers can turn them OFF and ON whenever necessary.