Pneumatic control valve for use in e.g. testing device for adjusting flow of compressed air at operating output of housing in process technology, has feedback line provided between precontrol output and channel section or operating output

摘要

The valve (130) has a precontrol chamber (131) including a precontrol input (132) for filling a precontrol chamber with precontrol fluid (V), and a precontrol output (133) for draining the precontrol fluid from the precontrol chamber. The precontrol input is flow connected with an operating input. A feedback line (55) is provided between the precontrol output and a secondary channel section (145) of a working channel or an operating output. The channel section is connected with the operating output. Compressed medium (D) flows into a valve housing via the operating input.