型号 800 压差控制阀
用于控制管道系统上2点之间的压差；
主要应用于暖通系统；
当2点之间压差增加时，主阀趋向打开；
当压差减小时，主阀趋向关闭。
The Model 800 Differential Pressure Valve
is a hydraulically operated, pilot-controlled, modulating valve. It is designed to maintain a constant pressure differential between any two pressure points in a system where the closing of the valve directly causes the differential pressure to increase. The valve tends to open on an increase in differential pressure and close on a decrease in differential pressure.
In operation, the valve is actuated by line pressure through a pilot control system sensing from two points across which a differential is to be maintained. Operation is completely automatic and pressure settings may be easily changed.
*差压旁通 (平衡) 控制阀是维持两个压力源上的恒定压差在压差增加状态下主阀开启，压差下降时主阀关闭，阀门控制由向导阀感应两个压力源的压差来实现主阀的自动调节及系统自动化，故整管通阀设定压力可轻易改变压差。
