GAS FLOW CONTROL DEVICE Russian patent published in 2013 - IPC F16K17/30 F16K15/06 F16L55/10 

FIELD: machine building.

SUBSTANCE: gas flow control device includes gas-tight housing (1). Inside housing (1) there is seat (5) for plug (12) movable in an axial direction, rod (11) carrying plug (12), guide (6) located on the side of inlet of housing (1) in the flow direction, and bushing (10) placed in the middle of that guide. Guide (6) has several holes (8) for gas flow passage, which are formed with radial partitions (7). Bushing (10) is controlled in axial direction, and rod (11) is located in it so that it can be moved in longitudinal direction. One side of spring (15) is fixed on bushing (10), and its other side is fixed on plug (12) retained by elastic force in the open position opposite the flow direction. Rod (11) with limit stop (17) located on the end on the side of the outlet is borne against guide (6) through tubular insert (16). Insert (16) is rigidly attached to bushing (10).

EFFECT: maintaining a certain range of values of the closing flow rate, or nominal flow rate by changing the preliminary stress of the spring without changing the travel of the plug, and thus, without decreasing or increasing the flow clear opening.

6 cl, 3 dwg