Abstract: A compressed air conditioning apparatus (2) and a load control device (1) equipped therewith are proposed, the compressed air conditioning apparatus (2) comprising a switch-on valve (14) with 3/3-valve functionality. By means of the switch-on valve (14), an outlet passage (22) leading to a load device (A) can, among other aspects, be optionally supplied with compressed air or disconnected from the compressed air supply. By means of a pressure sensor (24) and/or a flow sensor (25), actual pressure and/or flow data can be recorded and compared to reference data previously stored in a teaching mode. As a function of the comparison result, an electric diagnostic signal can be generated, offering, among other aspects, the opportunity for monitoring leakage from the load device (A) or excessive air consumption.

Abstract: A fuel metering pump (1) has a solenoid coil (2), an armature (3), a delivery piston (4) and spring-loaded valves. The spring-loaded valves are embodied as an electrically controlled suction valve (5) and an electrically controlled pressure valve (6). A solenoid coil (2) is provided for the armature (3) of the delivery piston (4), the armature (7) of the suction valve (5) and the armature of the pressure valve (6). The masses, springs and hydraulic cross-sections of the component parts are configured in such a way that the valves switch more quickly than the delivery piston moves.

Abstract: A metering device for a heating appliance has a pump arrangement for the delivery of liquid that is supplied via an inlet region to an outlet region and a valve arrangement by which the pump arrangement is connected with the inlet region to receive liquid or with the outlet device to deliver liquid. The valve arrangement has a valve member that is brought into a first actuating position in which the valve member permits a liquid flow from the inlet region to the pump arrangement and prevents a liquid delivery from the pump arrangement to the outlet region. In a second actuating position the valve member prevents a liquid supply from the inlet region to the pump arrangement and permits a liquid delivery from the pump arrangement to the outlet region.

Abstract: A metering pump device, particularly for a heating appliance has a pump arrangement for the delivery of liquid which can be supplied via an inlet region to an outlet region and also a valve arrangement by means of which the pump arrangement can be selectively brought into connection with the inlet region to receive liquid or into connection with the outlet device for the delivery of liquid. The valve arrangement has a valve member that can be brought into a first actuating position and into a second actuating position. The first actuating position the valve member permits a liquid flow from the inlet region to the pump arrangement and prevents a liquid delivery from the pump arrangement to the outlet region, and in the second actuating position the valve member prevents a liquid supply from the inlet region to the pump arrangement and permits a liquid delivery from the pump arrangement to the outlet region.