PRESSURE CONTROLLER Russian patent published in 2010 - IPC G05D16/06 

FIELD: machine building.

SUBSTANCE: gas pressure controller consists of case 1 with cover 2 and inlet 3 and outlet 4 cavities. Also gas pressure controller consists of setting mechanism in form of screw 5, stops 6 and setting spring 7. Additionally, the gas pressure controller is equipped with a sensing element containing membrane 8 pressed between disks 9 and 10 of controlling device in form of valve 11 with rod 12 and seat 13 installed on a bridge between inlet 3 and outlet 4 cavities. Protective bushing 14 with a bottom out of material of low friction coefficient, for example fluoroplastic is installed on the side of low pressure between membrane 8 and bearing disk 9. Notably, bearing disk 9 from the side of low pressure is made as a piston; external diametres of protective bushing 14 with the bottom and of bearing disk 9 from the side of low pressure have minimum gap with internal diametre of cover 2 of case 1. The facility has sub-membrane A and over-membrane B cavities, opening C for back feed pressure supply and an atmospheric opening.

EFFECT: increased reliability of facility, prevention of explosive hazardous situation.

1 dwg