Abstract: A gas control valve (1) has a central module (40), a control module (20) and a sensor module (30). Gas can flows through the central module (40) from a valve inlet (41) to a valve outlet (42). The control module (20) is directly on the central module (40) and controls a flow of the gas through the central module (40). A throttle element (23) is fluidically arranged between the valve inlet (41) and the valve outlet (42). The sensor module (30) is arranged directly on the central module (40) and has at least one sensor (31, 32) in operative connection with the gas flowing through the central module (40) through a gas inlet (44) fluidically arranged between the throttle element (23) and the valve outlet (42). In order to control the pressure, it detects a pressure difference between the gas flowing through the central module (40) and air having a reference pressure.

Abstract: A method for evaluating a sensor-detectable transient pressure difference on a gas boiler. The sensor detects a differential pressure at a measurement point upstream of the main flow restrictor (3) and downstream of the control valve (2) and a reference pressure and transmits it to the evaluation electronics. The sensor detects a differential pressure course and transmits it to the evaluation electronics, during variation of heat output and/or when the heat output is adjusted to the predetermined value. The evaluation electronics evaluates the differential pressure course over its time range and/or its frequency range. At least one characteristic value is determined and compared with a predetermined comparison value. If the characteristic value deviates from the comparison value, an error of the gas boiler is recognized.

Abstract: A method for evaluating a quasi-stationary pressure difference detectable by a sensor at a gas boiler. The gas boiler has a mixing device (4), a fan (5), a main flow regulator (3), .a control valve (2) and a safety valve (1). The sensor detects a differential pressure between a pressure (p2) at a measuring point upstream of the main flow regulator (3) and downstream of the control valve (2) and a reference pressure (p0, p1) at a reference measuring point. The sensor transmits a signal to an electronic evaluation system. The electronic evaluation system compares the differential pressure during a pre-purge phase, wherein the safety valve (1) is closed, with the differential pressure after the pre-purge phase and detects an error by the comparison.

Abstract: A safety valve (1) has a first valve, and a second valve, a magnetic armature (3) moved by voltage applied to a coil (2). Movement of the armature (3) acts against a spring force of the first valve spring (5) and loosens the first valve body (4) from the first valve seat (6). The movement of the armature (3) subsequently acts against a spring force of the second valve spring (8) and loosens the second valve body (7) from the second valve seat (9). This frees a valve opening for a flowthrough of the gas flow. The flowthrough amount of the gas flow through the valve opening can be continuously controlled as a function of the voltage applied to the coil (2) between a closed position and a fully open position even in partially open positions.

Abstract: A safety valve (1) has a first valve, and a second valve, a magnetic armature (3) moved by voltage applied to a coil (2). Movement of the armature (3) acts against a spring force of the first valve spring (5) and loosens the first valve body (4) from the first valve seat (6). The movement of the armature (3) subsequently acts against a spring force of the second valve spring (8) and loosens the second valve body (7) from the second valve seat (9). This frees a valve opening for a flowthrough of the gas flow. The flowthrough amount of the gas flow through the valve opening can be continuously controlled as a function of the voltage applied to the coil (2) between a closed position and a fully open position even in partially open positions.

Abstract: The invention relates to a gas control unit of modular design, in particular for controlling the quantity of gas to be fed to a gas burner, having a pneumatically controlled gas control valve that is configured as a whole as a module and is usable in such a gas control unit of modular design together with a gas safety valve.

Abstract: The invention relates to a gas control unit of modular design, in particular for controlling the quantity of gas to be fed to a gas burner, having a pneumatically controlled gas control valve that is configured as a whole as a module and is usable in such a gas control unit of modular design together with a gas safety valve.