| 摘要 |
<p>A differential piston 4 having a profiled waist or intermediate portion 5 defined between two portions of different radius is slidably mounted on a spindle 6 within a housing having inlet and outlet ports 2, 3. The piston is urged by a spring assembly 2 to allow communication between the inlet and outlet ports through an annular control port formed between the waisted portion of the piston and the interior of the housing. The action of an incoming high pressure fluid at the waisted portion and against the piston portion of greater radius displaces the piston against the action of the spring assembly to maintain a substantially constant pressure and hence flow in a branch line connected to the outlet port 3. Means are provided for adjusting the spring assembly and thereby the operating range of the regulator. <IMAGE></p> |
