T3, T4
Temperature class: classification of equipment within classes depending on
their maximum surface temperature corresponding to the table given
below:
Temperature class Maximum surface
temperature (°C)
T1 450
T2 300
T3 200
T3 (160 °C) 160
T4 135
T5 100
T6 85
The temperature class and the actual maximum surface temperature of the
equipment includes a safety margin with respect to the minimum ignition
temperature of the potentially explosive atmosphere as demanded by EN
13463-1.
Ta Permissible ambient temperature for operating the pump
10 °C < Ta < 40 °C.
X Special operating conditions need to be complied with!
The special conditions and information provided in the Operating
Instructions apply.
Modifying the supplied pump, voids the CE and ATEX Declaration of
Conformity.
Related Accessories
When using accessory components together with the pump it needs to be
ensured that these accessories are suited for operation in explosion hazard
areas.
Operation in the Pump System
When operating the screw pump in a pump system, different ATEX catego-
ries or temperature classes may apply. You must ensure that the operating
parameters comply with the stated technical data. You must run an ignition
hazard assessment for the entire pump system.
Areas of Application
The inside (process gas side) of this vacuum pump is so rated and designed
that the occurrence of foreseeable ignition sources can be excluded during
normal operation. Provided the pump is operated in accordance with the
parameters specified in the Operating Instructions the pump will offer a nor-
mal degree of protection. For this reason it is suited for operation under con-
ditions where it is unlikely that an atmosphere capable of exploding is created
by gases, dusts, vapours or mists in the air or if such atmospheres do occur
then this only rarely and only briefly (i.e. Zone 2).
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