ENGLISH – 5
3.2.1 Product durability
The product’s durability is its average economic life value and is
strongly inuenced by the degree of severity of the manoeuvres:
in other words, the sum of all factors that contribute to product
wear.
To estimate the durability of your automated device, proceed
as follows:
1. add the values of the items in “Table 1” relative to the
system’s conditions
2. in the graph shown in “Figure 4”, from the value obtained
above, trace a vertical line until it intersects the curve;
from this point trace a horizontal line until it intersects the
line of the “manoeuvre cycles”. The value obtained is the
estimated lifetime of your product.
The durability values shown in the graph can only be obtained
if the maintenance schedule is strictly observed – see the “
PRODUCT MAINTENANCE” chapter. The durability is estimated
on the basis of the design calculations and the results of tests
effected on prototypes. Being an estimate, therefore, it offers no
explicit guarantee of the product’s actual useful life.
Example of lifetime calculation: automation of a gate with
a 2,8 m-long leaf weighing 230 kg, for example with a solid
leaf.
“Table 1” shows the “severity indices” for this type of installation:
20% (“Door length”), 20% (“Door weight”) and 15% (“Solid leaf”).
These indicators must be added together to obtain the overall
severity index, which in this case is 55%. With the value
identied (55%), look at the horizontal axis of the graph (“severity
index”) and identify the value corresponding to the number of
“manoeuvre cycles” that the product can perform throughout its
lifetime – roughly 220.000 cycles.
Table 1
PRODUCT DURABILITY
Severity index
arm with FULL
length
arm with
REDUCED
length
Leaf length
< 1,8 m
1,8 - 2,5 m
2,5 - 3,0 m
3,0 - 3,5 m
0%
15%
20%
30%
15%
20%
30%
-
Leaf weight
< 200 kg
200 - 250 kg
> 250 kg
0%
20%
30%
30%
40%
-
Ambient temperature greater
than 40°C or below 0°C, or
humidity greater than 80%
20% 20%
Solid leaf
15% 20%
Installation in windy areas
15% 20%
Note The data refers to a properly balanced sectional door in
good working order.
10000
200000
300000
400000
500000
Durability in cycles (No.)
Severity index (%)
4
3.3 PRODUCT IDENTIFICATION AND OVERALL
DIMENSIONS
The overall dimensions and the label (A), which allows for
identifying the product, are shown in “Figure 5”.
320 mm
210 mm 290 mm
A
5
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