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7. Appendix
7.2 Appendix B
ATEX Directive 94/9/EC
The ATEX Directive 94/9/EC covers equipment and protective systems that will be used in areas endangered by potentially
explosive atmospheres created by the presence of flammable gases, vapours and dusts. Rotary Lobe Pumps supplied with an
ATEX symbol are classified for use in potentially explosive atmospheres under ATEX Directive 94/9/EC Group II, Categories 2.
Technical File Ref:
SSP-Xex – 1/7 Document reference no. 9612-9602-01
Type of Equipment:
Rotary Lobe Positive Displacement Pumps
Equipment Group:
Group II category 2 G (zone 1) and D (zone 21)
and Category
For Temperature class see table below
Ignition Protection used:
EN13463-1: 2001 c k
Maximum Surface Temperature
The maximum surface temperature of the pump is dependent upon the temperature
of the media processed by the pump. The table below relates the process fluid
temperature to the maximum surface temperature on the pump and temperature
class. It is important that the correct seal temperature class is applied as referred
to in the seal suppliers supplement sheet.
To ensure the pump supplied is compliant with this directive, the
additional
instructions must be followed :
a)
Apply all additional instructions listed in Appendix A.
b)
Dependent upon product/duty and cleaning (CIP) conditions the pump’s external surfaces may become hot – the
temperature should not be allowed to exceed the stamped temperature class shown on the machines label. Daily
checks must be made for any signs of overheating and/or paint discolouration.
c)
The weekly maintenance checks listed in the Maintenance Schedule should be made on a daily basis, and a daily
check on the lubrication for signs of contamination must be added.
d)
Pump gearbox bearings must be renewed every 2 years or 9000 hours whichever is first.
e)
Replace gearbox lip seals if disturbed i.e. cover removed.
f)
A pressure gauge and control valve should be fitted to the seal flush outlet pipe work, and a minimum back pressure
of 0.3 bar applied during operation.
PLEASE READ AND APPLY THE FOLLOWING
ADDITIONAL INSTALLATION AND OPERATION
INSTRUCTIONS IF THE PUMP IS INSTALLED IN AN
ATEX ZONE 1 OR ZONE 21 AREAS
Temperature Class
Temperature Class
Temperature Class
Temperature Class
Temperature Class
Maximum surface
Maximum surface
Maximum surface
Maximum surface
Maximum surface
Maximum temperature
Maximum temperature
Maximum temperature
Maximum temperature
Maximum temperature
temperature
temperature
temperature
temperature
temperature
of processed fluid
of processed fluid
of processed fluid
of processed fluid
of processed fluid
T1
T1
T1
T1
T1
450
450
450
450
450
o
o
o
o
o
C
C
C
C
C
N/A
N/A
N/A
N/A
N/A
T2
T2
T2
T2
T2
300
300
300
300
300
o
o
o
o
o
C
C
C
C
C
N/A
N/A
N/A
N/A
N/A
T3
T3
T3
T3
T3
200
200
200
200
200
o
o
o
o
o
C
C
C
C
C
150
150
150
150
150
o
o
o
o
o
C
C
C
C
C
T4
T4
T4
T4
T4
135
135
135
135
135
o
o
o
o
o
C
C
C
C
C
135
135
135
135
135
o
o
o
o
o
C
C
C
C
C
T5
T5
T5
T5
T5
100
100
100
100
100
o
o
o
o
o
C
C
C
C
C
100
100
100
100
100
o
o
o
o
o
C
C
C
C
C
T6
T6
T6
T6
T6
85
85
85
85
85
o
o
o
o
o
C
C
C
C
C
80
80
80
80
80
o
o
o
o
o
C
C
C
C
C
