| 摘要 |
<p>A flow control appratus comprises a disc (10) which can be inserted between a valve drain port (21) and a drain line. The disc (10) contains a plurality of openings (11) each of which receives a flexible flow control washer (30). The flow control washers (30) can be exchanged for other washers having different liquid flow rates. The disc (10) is sealed to the port (21) and drain line by simple O-ring seals (26).</p> |
