Breathing appts. gas supply low level-signalling device - has hand operated spring loaded bushing resting on other identically loaded bushing

摘要

The low level gas supply-signalling device is contained in housing (1) connected to the high pressure gas piping (2). When the gas is admitted to the high pressure piping (2) the gas pressure opens the valve assembly (3,4), by pushing the valve body (4) in axial direction against the pressure of springs (21) and (13) away from seat (3). Gas starts to flow via valve space (6), pressure reducing valve and pipe (8) to the breathing appts. With progressing consumption of the high pressure gas, its pressure drops and at a certain marginal pressure the spring (21) pushes the valve body (4) towards the seat (3). The spring (13) moves the bushing (9) in the same direction. During the gradual closing operation of the valve assembly.