<p>An output pressure control apparatus particularly adapted for HVAC control applications, and being of the general type which admits a higher supply pressure to a controlled output line when it is desired to increase the pressure in the output line and which bleeds pressure from the controlled output line when it is desired to reduce the pneumatic output pressure. The pressure regulating apparatus requires only a single filter means and utilizes bidirectional flow of air through the filter means during normal operation which cleans the filter means. <IMAGE></p>
申请公布号
DE69213344(D1)
申请公布日期
1996.10.10
申请号
DE1992613344
申请日期
1992.06.11
申请人
LANDIS & GYR POWERS, INC., BUFFALO GROVE, ILL., US
发明人
HURMI, DARRYL G., ELK GROVE VILLAGE, ILLINOIS 60007, US