FIELD: machine building.
SUBSTANCE: automatic valve comprises a valve seat with a set of first gas flow passages extending through said valve seat and arranged along concentric circles, a valve guard having a set of second gas flow passages extending through said valve guard and arranged along concentric circles, at least one movable sealing element arranged between said valve guard and said valve seat, a removable seat plate removably connected to said valve seat and provided with apertures matching said first gas flow passages, wherein a shock absorber is disposed between the removable seat plate and the valve seat, wherein said at least one movable sealing element is resiliently biased by resilient members against said removable seat plate to close said first gas flow passages, and wherein said seat plate and said at least one movable sealing element are made of non-metallic material.
EFFECT: automatic valve is provided, wherein one or more movable sealing elements and a removable seat plate are provided, both of which are made of a non-metallic material, preferably having a similar or substantially the same thermal expansion coefficient.
19 cl, 8 dwg
