Introduction and Safety
10
TT Twin-Screw Pump -
Installation, Operation & Maintenance Manual
2. Explosion Protection Labeling
2.1 Temperature class and type of explosion protection marking are on nameplate.
II 3G Ex h IIC T4...T1 Gc X
___________________________ CE Label
___________________________ Symbol for explosion protected equipment
II _____________________________ Equipment group per Directive 2014/34/EU is other than
underground
3______________________________ Equipment Category (section 2.2 below)
G______________________________ Explosion Atmosphere (G = Gas)
h ______________________________Ignition protection reference (see 2.4 below)
T4...T1__________________________Temperature class (see 2.3 below for Special Use Conditions)
X______________________________ Ambient Temperature (see 2.5 below for Special Use Conditions)
2.2 Category
Category 2 - The frequency of occurrence of dangerous potentially explosive atmospheres is only
occasional (any faults occurring must not become a source of ignition)
Category 3 - The frequency of occurrence of dangerous potentially explosive atmospheres is
unlikely and can occur only rarely and for a short time
1. The pump guarantees a normal level of protection.
2. No unacceptable high surface temperatures may become an ignition risk during normal operation.
