Patent ID: 9556961
Date: 2017-01-31
CPC Classifications: F16K,F25B,Y02B,Y10T

Claim:
1. A control valve comprising: a body having a lead-in port through which a fluid is led in, a lead-out port through which the fluid is led out, and a valve hole provided in a fluid passage joining the lead-in port to the lead-out port, wherein a valve seat is provided in an opening end of the valve hole; a valve element that opens and closes a valve section by touching and leaving the valve seat from an upstream side and blocks flow of the fluid between an upstream passage and a downstream passage in the fluid passage when the valve section is closed; and an actuating rod that operates to open and close the valve section, the valve element having: wherein the support member includes a supporting surface, which is in contact with a back surface of the sealing member opposite to the sealing surface of the sealing member, and an engagement part, which is engaged with the sealing surface of the sealing member, wherein the sealing member is fixed to the support member in such a manner that an outer peripheral edge part of the sealing member is held between an outer peripheral edge part of the supporting surface and the engagement part, and wherein a ring-shaped fluid flow passage is formed through a gap formed between the supporting surface of the support member and the back surface of the sealing member, and the fluid flow passage communicates with the upstream passage via a communication path formed in the support member.