INRICHTING VOOR DRUKDETECTIE EN VOOR BESTURING VAN EEN VEILIGHEIDSKLEPLICHAAM.

摘要

A control device for a fluid-operated safety valve of a boiler or the like comprises two chambers, each connected to the vessel to be protected and provided with respective valves. The first chamber is connected also to the cylinder of the safety valve via the first valve so that, when a pressure excess in the vessel develops the first chamber closes the connection between the vessel and the control cylinder while the second chamber vents the control cylinder to the atmosphere.