![ANSIMAG K+1516 Скачать руководство пользователя страница 16](http://html1.mh-extra.com/html/ansimag/k-1516/k-1516_installation-and-maintenance-manual_2945561016.webp)
16
Safety
TEMPERATURE CLASSIFICATION - (ATEX DIRECTIVE 94/9/EC)
The maximum surface temperature of a metallic magnetic drive pump is the
highest
temperature
ascertained from any one of the following conditions:
1. The temperature of the pumped liquid, plus 20
°
C.
or
2. The ambient temperature plus 20
°
C.
or
3. The ambient temperature plus 39
°
C (only in the case of separately mounted pumps with oil lubricated
bearing assemblies)
or
4. The temperature of the heating medium being used in the heating jacket (if fitted)
The actual classification is calculated by obtaining the maximum surface temperature and than using the
following table to obtain the relevant Temperature Class:
Temperature Class
Maximum Surface
Temperature (
°
C)
T1
450 (842
°
F)
T2
300 (572
°
F)
T3
200 (392
°
F)
T4
135 (275
°
F)
T5
100 (212
°
F)
T6
85 (185
°
F)
Example:
The pump is pumping a liquid with a temperature of 120
°
C. The pump is close coupled and therefore
does not have an external oil lubricated bearings. The maximum ambient temperature in which the pump
may operate is 30
°
C
Condition 1 equates to 120
°
C + 20
°
C = 140
°
C
Condition 2 equates to 30
°
C + 20
°
C = 50
°
C
Condition 3 does not apply.
Condition 4 does not apply.
Thus the maximum surface temperature of the pump is 140
°
C which equates to a temperature
classification
of
T3.