Gas regulator fitting

Gas regulator fitting for a gas heater or the like with a thermostatic safety pilot valve and a main valve that jointly serve both as a safety pilot and as a means of splitting up the gas stream into proportions for a main burner and a pilot burner of the gas heater, with a valve causing a stepwise switching on and off that is arranged downstream of the main valve in the flow path of the gas stream for the main burner, and can be controlled by a switch, and is accommodated with further secondary functional elements in a housing (1), wherein the switch can be activated by a longitudinally movable ram (8) which leads out from the gas-conducting area of the housing (1) and whose position can be altered by metal bellows (9) connected by a capillary line (10) to a temperature sensor (11), wherein the metal bellows (9) are supported on an operating element (18) that influences their position and is activated manually and/or by a drive unit, characterised in that between the ram (8) and the operating element (18) one or more bimetal discs (17) are arranged whose overall height, which varies in the direction of movement of the ram (8) depending on the ambient temperature, can influence the position of the metal bellows (9).