| 摘要 |
<p>An object of the present invention is to provide a constant flow valve able to make the flow rate constant at all times even if the upstream and downstream side fluid pressure of the valve fluctuates for a large flow rate fluid and able to set the flowing fluid to any flow rate. The main body according to the constant flow valve according to the present invention has a valve seat at a peripheral edge of a ceiling surface opening provided at said cylinder part ceiling surface, said piston has a valve element corresponding to said valve seat and a flange, said flange divides said cylinder part into a first valve chamber communicating with said first channel and a second valve chamber from which said valve seat is exposed, a clearance channel is formed in a clearance between said flange outer circumference and said cylinder part inner circumference, and an upward and downward motion of said piston causes a channel area between said valve element and said valve seat to change whereby a fluid pressure of said second valve chamber is controlled.</p> |
