TWO-STAGE GAS PRESSURE REDUCER Russian patent published in 2009 - IPC G05D16/10 

FIELD: machine building.

SUBSTANCE: invention relates to gas industry and can be used in gas transportation and use. The proposed two-stage gas pressure reducer is made up of body 1, cover 2 with inlet union 3 and two stage of pressure reduction. Note that the first stage consists of valve 10, first sensitive element with first piston 4 with a con-rod and axial channel 5 arranged therein, axial spring 6 and the following spaces, i.e. first outlet space7, under-piston space 8 and above-piston space 9. The second stage consists of the second sensitive element with second piston 11, screw 12 and pressure setting spring 13, second valve 14 with seat 15 and the following spaces, i.e. second outlet space 16 and pressure setting space 17. Note also that the first stage under-piston space 8 communicates via channel 18 with the second stage second outlet space 16. Note also that filter 19 representing a set of screens is arranged between body 1 and cover 2 with inlet union 3. Second valve 14 represents a ball with push rod 20, its second end being provided with thrust washer 21 with spring 22. The said ball surface 23 is in a point contact second piston 11.

EFFECT: higher reliability.

1 dwg