Compressed air system frost protection pump - has port in wall connecting fluid valve to air chamber

摘要

The pump delivers anti-freeze liq. into a compressed-air system, particularly one operating vehicle brakes. It has a housing with a first chamber through which the compressed air flows, connected between the source and the consumer unit. This chamber is connected by a valve to a second one containing the liq., the second chamber being in turn connected to a storage vessel. There is a wall (22) between the outlet valve (17,18,19) for the liq. and the first chamber (2), and which contains a port connecting the latter to the chamber (23) in which the valve is accommodated. The port can be in the form of a drilling (16) inclined to the axis of the first chamber in the flow direction of the compressed air.