| 摘要 |
<p>A pressure regulator apparatus is provided which includes a regulator body having an inlet, an outlet and a passage communicating there between. The pressure regulator apparatus includes a valve disposed within the passage having a valve seat and a valve stem with one end of the valve stem biased toward the valve seat. The pressure regulator apparatus further includes a plunger member connected to the valve stem at an end opposite the valve seat with the plunger member movable axially with respect to the valve seat. The plunger member is further connected to a biasing member so that the plunger member biases the valve stem toward the valve seat to control the pressure of the fluid flowing through the pressure regulator. A flexible diaphragm is connected at an inner end between the valve stem and plunger member and connected at an outer end against the regulator body. The diaphragm is flexible as the plunger member and valve stem move axially with respect to the valve seat. Sealing members are disposed within a channel or groove in the valve stem and regulator body for engagement with the diaphragm to seal the passage of the regulator body. The cross-sectional area of the sealing members is less than the cross-sectional area of the channel in which the sealing members are disposed so that a portion of the diaphragm may extend into the channel when the diaphragm is under pressure to reduce movement of the diaphragm into the area between the regulator body and valve. Preferably, the diaphragm is compressed between the plunger member and the valve stem and against the regulator body in sufficient amount to retain the diaphragm in position and prevent leakage between the diaphragm and sealing members while minimizing the movement of diaphragm material into the non-compressed area between the valve and regulator body.</p> |
