| 摘要 |
<p>1,035,427. Valves. TEXSTEAM CORPORATION. June 15, 1965 [Aug. 26, 1964], No. 25203/65. Heading F2V. A flow control valve comprises a deformable disc 106 having opposed dish-shaped surfaces bonded to backing plates 102, 104 having surfaces conformably mating with those of the disc. Backing plate 102 is connected to a hub 40 positioned by webs 42 in the valve inlet and plate 104 abuts a movable cylinder 58 having a projection 62 passing through plate 104 to contact the disc. The cylinder 60 houses a hollow stationary piston 54 the interior of which communicates with a cylinder 76 housing a piston 80 operatively connected to a diaphragm 96. Downward movement of the diaphragm is transmitted to the cylinder 58 via hydraulic fluid within cylinder 76 and the interior of the piston, and movement of the cylinder deforms the disc into engagement with a seating ring 36. The outer diameter of the disc in its unstressed condition is preferably 0À875 times the internal diameter of the seating ring, whilst the width of the disc at its central zone is preferably 0À5 times its outer diameter.</p> |
