一、产品简介   Product Introduction

        D520/7DD切换差可调、D520/7DD切换差不可调、D520/7DDK小切换差不可调、D520/7DDZ双触点不可调全系列差压控制器采用波纹管式传感器。可用空气、气体、水蒸汽和中性气体和水,油及致冷剂等液体介质。控制器的设定值可调，调节范围0.02~1.6MPa。工作压力范围0.05~2.5MPa

        D520/7DD switching difference is adjustable,the D520/7DD switching difference is not adjustable, the D520/7DDK smallswitching difference is not adjustable, and the D520/7DDZ dual contact is notadjustable. The entire series of differential pressure controllers adoptscorrugated tube sensors. Liquid media such as air, gas, water vapor, neutralgas, water, oil, and refrigerants can be used. The set value of the controlleris adjustable, with an adjustment range of 0.02~1.6MPa. Working pressure range:0.05~2.5MPa

二、工作原理   Operational principle

三、技术参数   Technical Parameter

四、产品分类 Product classification

五、外形尺寸 External dimensions

六、安装说明   Installation instructions

以上参数仅供参考，如有改动恕不另行通知!

Above parameters are for referenceonly and are subject to change without prior notice!