REDUCING VALVE Russian patent published in 2010 - IPC F16K17/04 G05D16/06 

FIELD: machine building.

SUBSTANCE: reducing valve consists of inlet and outlet chambers made in case, of cover in form of cartridge, of membrane, of rod, of plunger and piston stroke arresters. A threaded bushing with an adjusting screw is installed on the bottom of the cartridge. A driving compression spring is installed inside the cover between upper and lower supports. A membrane is clamped along perimetre between the case and the pole. The rod runs through a throttling orifice. The pole with the piston is arranged between the case and the cover. The central orifice rounded in the direction of the outlet chamber is made in the pole. Blind threaded holes for installation of piston motion arresters are made on opposite plane of the pole. On the external diametre of the pole there is made thread for cover connecting. Depth of piston penetration into the central orifice of the pole from the side of the driving compression spring is limited with a circular collar on the opposite end of the piston. A cylinder lug is made in the centre of the membrane out of elastic material. The lug is conjugated with the central orifice in the pole along diametre, rounded radius and the end of the piston. The rod is centred in a through hole in the lug of the case and has lengthwise slots for gas flow. The plunger in form of a cartridge is mounted on the cylinder lug of the case. A packing element is attached to the bottom of the cartridge. On side walls of the cartridge there are made inlet holes.

EFFECT: raised reliability of operation and upgraded accuracy of maintaining preset output pressure.

5 cl, 3 dwg