| 摘要 |
PCT No. PCT/RU95/00104 Sec. 371 Date Aug. 18, 1998 Sec. 102(e) Date Aug. 18, 1998 PCT Filed Jun. 26, 1995 PCT Pub. No. WO96/31719 PCT Pub. Date Oct. 10, 1996A regulation disc valve with discharging device comprises a body (1) containing an easily removable fixed seat (2) with peripheral ports (3) and a central channel (13); a rotary disc slide (4) with notches and a central longitudinal aperture constantly engaging seat (2); a spindle (5); and a lid comprising a cylinder (8). A piston (7) permanently connected to slide (4) cooperates with cylinder (8) to form a discharge chamber (9), which is in turn connected to a drainage cavity (11). On the sealing surface of slide (4) is an intermediate chamber (12) formed by sectorial notches that interact with central channel (13) of seat (2) (FIG. 1, FIG. 2). The valve provides optimal pressure of slide (4) against seat (2) under various surface areas of the passage ports (3) without modifying the dimensions of the discharging device for that type of valve. At the same time, the valve eliminates the possibility of slide (4) disengaging from seat (2) under any degree of valve opening without changing the pressure in discharge chamber (9). The valve also provides constant specific pressure at the sealing, surfaces. There is no limitation of the disc valve flow capacity if a high differential pressure is applied to the valve.
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