ATEX Retractor System TANKO-RT/-RTS
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Translation - Operating/installation instructions 2020/01
3 Design and Function
3.2.2
Functional Flow Chart
Components
1x
Power cylinder (P), double acting
1x
Locking cylinder (L), single acting, with spring return
Sensors
1x
End position power cylinder, “extended”
2x
End position power cylinder (redundant), “retracted”
1x
End position locking cylinder extended, “unlocked”
1x
1x
End position locking cylinder retracted, “locked”
At operating temperatures > 70 °C of the cleaning medium or the cleaning
medium or in the container: Resistance thermometer for monitoring the
temperature at the limit switch power cylinder F “extended”; constant monitoring
of the temperature required in all operating states (cleaning and rest)!
Conditions for start of cleaning cycle (examples):
Container empty
Product supply closed
Agitators etc. shut down
Drain for cleaning agent open etc.
Function Sequence
Condition
→
Action
()
Temperature of 66 °C exceeded at
temperature sensor T
→
Plant failure, transfer plant to a safe state
1
Conditions for cleaning cycle met
→
Start cleaning cycle
2
Cleaning cycle started
→
Locking cylinder extends “unlock”
3
Locking cylinder extended (J energized)
→
Power cylinder extends “extend”
4
Power cylinder extended (F energized)
→
Locking cylinder retracts, “lock”, cleaning
medium supply on, cleaning carried out
5
Cleaning finished, cleaning medium supply
off, locking cylinder retracted “locked”
(K energized, spring relief)
→
Start timer t1 = 60 s, locking cylinder
extends “unlock”
6
Locking cylinder extended (J energized) and
timer 1 elapsed
→
Power cylinder retracts “retract”
7
Power cylinder “retracted” (G1 and G2
energized)
→
Start timer t2 = 1 s
8
Power cylinder retracted (G1 and G2
energized) and timer t2 elapsed
→
Locking cylinder retracts “lock”
9
Power cylinder retracted (G1 and G2
energized) and locking cylinder retracted
(K energized)
→
Release start of process