Dear Sudo san,
Sample bag filling sequence at Filler#1
Normal function
- Filling time is set around 300-400 (3-4 sec)
- Flushing 500/200/200/0
- Valve activation is same as 200L. Filling valve#1 open - Filling valve#2 close – V8 close
- In the program, once complete filling time, there is timer (currently set at 30) to delay filling valve activation (closing) in order to prevent flow blocking.
- If there is any event that Filing valve#2 is not open, V8 will open.
Fill by pause function
- To minimize product recirculation
- Filling time is set around 300-400 (3-4 sec)
- Flushing 500/200/200/0
- Working step and valve activation, for example filling sample bag at Filler#1
1. Place sample bag to Filler#1 while Filler#2 is filling
2. Push Filler#1’s start button. Sample bag is sterilizing
3. Once Filler#1 finished sterilization. Operator press Pause Button at control panel#1
4. Filling valve#1 open - Filling Valve#2 close. At this step program still acknowledge as “Filling at Filler#2, filling valve still open” and steam still supply to chamber#2
5. Sample bag is completely filled, Filling valve#1 close. Operator will press Pause Button at control panel#2. Then Filling Valve#2 open.
6. V8 closed all time of this filling cycle.
- This is one of spike down’s cause. It really depend on how fast of operator to press Pause Button after complete sample bag filling…It means how long of both Filling Valve close while V8 not open
On 3-Feb, after we check program and sequences, we planned to vary filling order to see valve activations and monitor UHT’s graph.
We started by sample bag filling with Pause Function. During monitor UHT recorder we saw spike graph. Later on we changed to fill by normal function and other filling orders and never found any spike.
Timeline of sample bag filling with pause function:
- Since beginning to 25-Nov: Sample bag filling with pause function
- 26-Nov: filled with Pause Function several bags. Pressure at filler was very high, then changed to fill only 200L
- 11-Jan: Fill sample bag with normal function
- 29-Jan: Fill sample bag with normal function
- 3-Feb: Fill sample bag with Pause Function until 11:30 and changed to normal function
I’m sorry, it’s quite ling explanation. Please feel free to ask if you are not clearly understand.
Best regards,
Aek