Stabilizers of pressure class A to EN 88 with safety valve integrated class A to EN 161 and EN 13611 to ensure and regulate the gas pressure in the sections of the inlet gas and burner, for gas and air, pU max. 500 mbar, with indicator light, IP 65, screw connection M20 enclosed loose, EU model tested and certified, VAD, VAG: approvals ANSI/CSA and AGA, VAD, VAG, VAH: approval FM, VAD, VAG, VAV: approval UL, VAD 1, VAG 1, VAV 1: certification for systems to SIL 3 and PL e.