| 摘要 |
<p>A diaphragm valve for controlling a flow of gaseous or liquid fluid and including a valve housing (101) having a valve chamber (102), into which opens a central channel (104) and on each side thereof a first side channel (103) and a second side channel (104), respectively, having each an external connection (106, 107, 108) for fluid, valve seat means (110a, 110b) arranged in the housing, an elastic diaphragm (112) adapted to be brought into and away from sealing contact with at least one of the valve seat means, and control means (117, 118) for actuating the diaphragm. At least one portion of each valve seat means (110a, 110b) is common to the central channel (104) and one of the side channels (103, 104). Two control means (117, 118) are arranged on one hand to press the diaphragm (112) against one such portion each, thereby to shut off the passage of fluid between the central channel and the respective side channel, on the other to raise one portion each of the diaphragm off the respective portion of the valve seat means thereby to open passage of flow between the central channel and the respective side channel.</p> |
