VALVE Russian patent published in 2006 - IPC F16K3/24 

FIELD: valving.

SUBSTANCE: valve comprises housing and ring seat tightly secured inside the housing. The seat tightly embraces a part of the side of the insert. The insert is provided with the first seal mounted inside the housing in the vicinity to the first face of the insert. The insert is also provided with the male ring seat and through first opening. The first opening represents the output opening of the valve whose one edge is interposed between the first seal and ring seat. The housing has second opening that represents the inlet opening of the valve and third opening that receives the second seal that embraces a part of the driving bushing connected with the drive. The drive sets the driving bushing in reciprocation. The bushing has the first part with constant outer cross-section and second part with constant inner cross-section. The second seal is mounted on the surface of the first part. The rod is connected to the first face of the insert. The third seal that is set in the second section of the insert is secured to the rod. From the side of the second part with constant inner cross-section, the driving bushing is secured to the outer side of the bottom of the sleeve. The bottom of the sleeve is provided with through openings. The inner surface of the sides of the sleeve that embraces the first seal has constant inner cross-section. The shape edge of the sides of the sleeve corresponds to that of the ring seat for permitting pressure-tight contact between the edge and ring seat. The area of the part of the cross-section of the driving bushing defined by the inner surface of the wide part of the driving bushing is equal to 0.9-1.1 of the area of the part of the cross-section of the driving bushing defined by the outer surface of the narrow part of the driving bushing. The sleeve and driving bushing are made for permitting reciprocation.

EFFECT: enhanced reliability.

14 cl, 2 dwg