Patent ID: 8434517
Filing Date: 2013-05-07
Classification: F16K,Y10T

Abstract:
1. A control valve for controlling an amount of flow of a fluid with controlling pressure, comprising: a main body having a partition portion dividing an inside of a valve space chamber into a first valve chamber and a second valve chamber, said partition portion being provided with a bore-forming surface for a through-hole penetrating said first valve chamber and said second valve chamber, and said bore-forming surface being provided with a first valve seating surface at a side of the first valve chamber; a supply port penetrating into said first valve chamber of said main body and flowing a fluid with supply pressure; an output port penetrating into said second valve chamber of said main body and flowing the fluid with controlling pressure; a discharge port penetrating into said first valve chamber of said main body and flowing a fluid with discharge pressure; a first pressure-sensing spring device a valve seat body having a second pressure-sensing spring device a solenoid portion configured to move a solenoid rod connecting with said valve seat body toward said valve seat body according to a magnitude of electrical current, wherein said first valve portion surface and said first valve seating surface constitute said first poppet valve, wherein said second valve portion surface and said second valve seating surface constitute said second poppet valve, and wherein each pressure receiving area of a first effective pressure receiving area of said first pressure-sensing spring device, a second effective pressure receiving area of said second pressure-sensing spring device, a first pressure receiving area of an inner diameter surface where said first valve seating surface and said first valve portion surface are jointed, and a second pressure receiving area of an inner diameter surface where said second valve seating surface and said second valve portion surface are jointed is made to be substantially equal.