SPX APV DELTA SDU4, Operating Manual, Page: 10 / 39

5
5. Cleaning
- Depending on the pressure ratio, cleaning temperatures and degree
of soiling, different times have to be adjusted.
- Flushing quantity per CIP spraying about 1,2ltr/10s
- Cleaning pressure at CIP cleaning connection min. 2 bar.
max. 5 bar.
Recommendation for cleaning times with common operating
conditions and CIP liquids.
Cleaning of the leakage chamber
via the leakage valves.
cleaning step CIP spraying
pre-flushing 3 x 10 sec.
caustic flushing 80 o C 3 x 10 sec.
intermediate flushing 2 x 10 sec.
acid flushing 3 x 10 sec.
subsequent flushing 2 x 10 sec.
CIP in CIP out
Double Seal Change-Over Valves
Delta SDU 4
Operating Manual Rev. 1
For the cleaning of SDU4 valves distinction is made between
two areas.
- The flow chambers
The passages of the valve are cleaned by the cleaning liquid during
the cleaning of the connected pipelines.
- The leakage chamber
The cleaning of the leakage chamber is undertaken via the leakage
valves.The cleaning liquid is supplied via one leakage valve and
discharged to the atmosphere via the second leakage valve.
The restraint passage of the cleaning liquid provides for a perfect
cleaning of the whole leakage chamber.
Under normal conditions, 15 valves DN 25/1T - 100/4T can
be cleaned by one spray distribution line DN 25.
UK