Valve control head
A valve control head is a device for monitoring and controlling process valves . It also serves as the electrical and pneumatic connection and thus represents the link between the mechanical-pneumatic valve and the electronically operated system control.
As a rule, the control head consists of the three functional units valve control, feedback and visualization. The valve control implements the conversion of electrical signals into pneumatic controls. The feedback determines the valve status by means of individual sensors or continuous position measuring systems for feedback to the system control, as well as for the visualization unit of the control head to display the valve status on site.
In order to cope with applications in process engineering systems for food or pharmaceutical production, the control heads must meet special requirements. As an example, it should be mentioned here that z. B. Liquids can run off well in any installation position, easy cleaning is possible or a high resistance to chemicals and UV radiation must be given.
See also
Individual evidence
- ↑ Wolfgang Kunze: Technology brewers and maltsters. 7th edition, VLB Berlin, 1994, ISBN 978-3-921690-65-9 , pp. 344-345 in conjunction with p. 609
- ↑ EHEDG Guidelines DOC 8: Design criteria for hygienic machines, apparatus and components. 2nd edition, April 2014, p. 9 ff