| 摘要 |
The valve for regulating a supply of pressurised gas comprises an inlet connected with a source (4) of a pressurised gas and an outlet (5) from which a pneumatic signal is received, which signal commands a filter cleaning device (22) of a dust filter. An obturator (6), which opens and closes a connection between the inlet (5) and the outlet (6), is commanded to open by a difference between two pressures (p+ and p-) which is detected by means of two pilot tubes (29 and 30), one which reads the pressure of the polluted environment and another of which reads the pressure of the cleaned environment relating to a filter associated to the cleaning device. The valve enables the filter cleaning device (22) only when the filter is blocked up, with a consequent reduction both in terms of energy consumption and in terms of wear on the filter. <IMAGE> |
