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& nbsp; & nbsp; & nbsp; & nbsp; QFH series air filter regulator & nbsp; < br / >, use < couples />QFH series of air filter pressure reducer is one of instrument auxiliary device for pneumatic. Air pressure from the air compressor 0.3~1Mpa can be adjusted in 0~0.16; 0~0.25; 0~0.4;; 0~0.6Mpa. As an auxiliary device for the gas source pressure of various types of pneumatic automatic devices and other pneumatic devices.
two, structure and working principle of
2.1
QFH type air filter regulator structure structure principle chart. Working principle of />2.2
QFH


三、主要技术性能3.1减压器的基本参数及尺寸见表1所示
表1

         型号
项目 QFH-
111 QFH-
211 QFH-
212 QFH-
213 QFH-
221 QFH-
222 QFH-
223 QFH-
231 QFH-
241 QFH-
243 QFH-
261 QFH-
263 
气源压力
（MPa） 0.3~0.7 0.4~0.7 0.5~1.0 0.7~1.0 
最大输出压力
（MPa） 0.16 0.25 0.3 0.4 0.6 
最大输出流量
（m3/h） 3 12 40 3 12 40 3 40 3 40 
接管内螺纹 M10×1 G1 2” G3 4” M10×1 G1 2” G3 4” M10×1 G3 4” M10×1 G3 4” 
安装
尺寸 安装螺孔
中心距
mm M6 —— M6 —— M6&nb Sp; M6 
25    25  --   --; 25  25  > size (F * Hmm)   70
phi;                              


3.2
(2)
installation, use and maintenance < br />4.1 install < br />1, instrument installation must be according to the direction of the arrow or by "input" and "output" respectively connected with the pipeline, not wrong, installation is shown in Table 1, the installation of the size (mounting screw hole, center distance (mm)). />2 3, instrument under normal conditions of use, does not need to be special maintenance, suggestions in six months after use, repair time, the filter element is blocked, available 10% dilute boiling hydrochloric acid for half an hour, after drying back blowing can restore the flow characteristic.
5.1, ordering order must specify the product type, name, specifications and output pressure range. />5.2
5.3
appendix: QFH new, old type table