The role of compression springs bad gall on automatic control valve flow area of the size, so that a constant flow through the valve.
弹簧受压差的作用自动控制阀胆上过流面积的大小，从而使通过阀门的流量恒定。
According to regulate parts of the signal, the automatic control of valve opening, so as to achieve medium flow rate, pressure and level of regulation.
根据调节部位信号，自动控制阀门的开度，从而达到介质流量、压力和液位的调节。
Special control valves including: temperature and pressure reducing control valves, automatic recycle control valve, minimum flow control valves, etc.
特种控制阀有：减温减压调节阀、自动再循环控制阀、最小流量控制阀等。
Note:1. Pneumatic diaphragm valve also can be installed feedback signal, limited machine or localizer in order to adapt to the requirements of automatic, programed control or flow rate adjustment.
注：1、气动隔膜阀门尚可附装反馈信号、限位器和定位器，以适应自控、程控或调节流量的需要。
Note:1. Pneumatic diaphragm valve also can be installed feedback signal, limited machine or localizer in order to adapt to the requirements of automatic, programed control or flow rate adjustment.
注：1、气动隔膜阀门尚可附装反馈信号、限位器和定位器，以适应自控、程控或调节流量的需要。
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