| 摘要 |
<p>In a pressure regulating system for a fire extinguishing equipment according to the invention, a main valve isolates primary and secondary sides of the body of a pressure regulating valve from each other, and a valve chest is defined behind the main valve for communicating to the primary side. Also, a pressure regulating pilot valve is constructed such that a valve disc is provided in the valve chest, into which a primary side pressure is introduced, to be pressed against a valve seat by a biasing means, and the pressure bearing area of a first surface, which is subjected to pressure in a valve opening direction of the valve disc, is substantially equal to that of a second surface, which is subjected to pressure in a valve closing direction. <IMAGE></p> |
