Flotronic F 500 series, Инструкция по установке, эксплуатации и обслуживанию

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The surface temperature of the pump may be influenced by the temperature of the liquid handled.
The maximum, permissible liquid temperature depends on the temperature class and must not exceed
the values in the table applicable below. The temperature rise at the seals, bearings and due to the
minimum permitted flow rate is taken into account in the temperatures.
Maximum permitted liquid temperature for diaphragm pumps:
Temperature Maximum Temperature limit of liquid handled
Class to surface temperature depending on material and construction variant.
EN 13463–1 permitted Consult Flotronic Pumps Ltd.
T6 85
o
C (185
o
F) Consult Flotronic Pumps Ltd
T5 100
o
C (212
o
F) Consult Flotronic Pumps Ltd
T4 135
o
C (275
o
F) 105
o
C (221
o
F)
T3 200
o
C (392
o
F) 115
o
C (239
o
F)
T2 300
o
C (572
o
F) 115
o
C (239
o
F)
T1 450
o
C (842
o
F) 115
o
C (239
o
F)
Where there is any risk of the pump being run for prolonged periods against a closed or partially closed
valve generating high liquid and casing external surface temperatures, it recommended that users fit
an external surface temperature protection device.
2.5.2 Additional requirements for self-priming conditions
Where the system operation does not ensure control of priming, and the maximum permitted surface
temperature of the T Class could be exceeded, it is recommended for users to fit an external surface
temperature protection device.
2.6 Preventing the build up of explosive mixtures
ENSURE PUMP IS PROPERLY FILLED WHENEVER POSSIBLE AND DOES NOT RUN DRY
FOR LONGER THAN 5 MINUTES CONTINUOUSLY
Ensure the pump and relevant suction and discharge pipeline system is totally filled with liquid during
the pumping operation, so that an explosive atmosphere is prevented.
If the operation of the system cannot avoid this condition, ensure that the pump does not run dry for
more than 5 minutes continuously.
To avoid potential hazards from fugitive emissions of vapour or gas to atmosphere the surrounding
area must be well ventilated.
2.7 Preventing sparks
To avoid the potential hazard from random induced current generating a spark, the earth stud
on the pump casing or foot must be connected.
6-4
ATEX Safety Manual