What should be considered when replacing valves?
Only identical valves may be replaced. At some points, valves are screwed
directly into a block using screw connections. All fittings are used with a
sealing adhesive (Loctite) on the factory side. When removing screwed
connections, these must be completely removed and the adhesive residues
carefully removed. Only then can the screwed joint be reused with new
adhesive.
A calibration of the analog measuring channels is not necessary after
replacing valves!