GOK GWD, Assembly And Operating Manual

Page: 20 / 72

Limit indikator GWG type GWD
8 / 12 Part no. 15 382 56 b
Table 6: Calculation option for the adjusting dimension X
a = dimension a= H - L
1
- b
b = tank wall thickness
H = height or diameter of the tank
k = height bushing or threaded flange
1. maximum volumetric flow rate of the booster pump of the road tanker
Q
max
L/min
2. switching and closing delays of the booster pump of the road tanker Time
Level sensor according to measurement / datasheet t
1
s
Switch / relay / or such like
t
2
s
Booster pump, flow time
t
3
s
Shut-off fitting:
• mechanical, manually operated time alarm to closing start, closing
time:
•
electrically, pneumatically, or hydraulically operated, closing time:
t
4
s
s
Total time (t
total
= t
1
+ t
2
+ t
3
+ t
4
): T
total
s
3. Overrun volume V
4
Overrun volume from delays:
V
1
= Q
max
• ( t
total
/ 60)
V
1
L
Overrun volume from filler line:
V
2
= (
π
/ 4) • D
i
² • L
FL
/ 1000
D
i
= internal pipe diameter in mm
L
FL
= length of the filler line in m
V
2
L
V
4
= V
1
+ V
2
V
4
L
4. Level L
1
Volume at admissible level according to table 1 issue 1. V
3
L
Overrun volume
V
4
L
Volume at level L
1
V
5
= V
3
- V
4
V
5
L
Then, the volume at level V
5
value results, in combination with the calibration chart or by
calculation, in the level L
1
.
The adjusting dimension
X
for the GWG must be determined taking into account* the tank
shape:
Installation on tank ceiling:
X = H - L
1
- b
= mm
* if applicable Take into account ADJUSTING DIMENSION X AND SUBSEQUENT LEAK
PROTECTION LINING.