for domestic and industrial applications suitable for regulating systems requiring quick response (gas furnace) suitable for natural gas and non-corrosive gaseous media valve with inlet pressure compensation diaphragm assembly provided with. safety relief valve (SBV) for gas leakages ( pd max0.5 bar) safety diaphragm (only diaph. assy. 1, pd max0.5 bar) easy maintenance due to interchangeable cartridge assembly (plug-in module) type as zero governor