| 摘要 |
A flow control valve includes a main body 1 , bonnet 2 , spring receiving portion 3 , piston 4 , spring 24 , first diaphragm 27 , first valve member 5 , second valve member 6 and base plate 7 , wherein an opening area of a hydraulic control portion composed of a valve element of the second valve member and a valve seat of the main body is changed according to a motion of the piston.
|
