Patent ID: 9649588
Date: 2017-05-16
CPC Classifications: B01D,B60T,F01N,F16K

Claim:
1. An exhaust valve configured to discharge drain and air generated by a drying process in an air dryer that performs the drying process on compressed air supplied from an air compressor, to receive the pressure of the compressed air supplied from the air compressor in a valve closed state, and to open when receiving a control command pressure from a pressure governor when the compressed air reaches a predefined pressure, comprising: a valve body having a first longitudinal end and a second longitudinal end and pressed in a valve opening direction by the pressure of the compressed air; and an urging member being in contact with the first longitudinal end of the valve body and urging the first longitudinal end of the valve body toward the second longitudinal end of the valve body to urge the valve body in a valve closing direction against the pressure of the compressed air, wherein the valve closed state is maintained against the pressure of the compressed air by the urging force of the urging member, and when the control command pressure is received from the pressure governor, the control command pressure opens the valve against the urging force of the urging member.