Depa DH50-FA - 10.1 Category 1 Equipment Requirements; 10.1.1 Design, Housing, and Materials (Cat 1); 10.1.2 Usage Instructions (Zone 0); 10.1.3 Equipotential Bonding (Cat 1)

44
DEPA
®
Air Operated Diaphragm Pumps
10.1.3 Equipotential bonding
Earthing of pump and pulsation damper by
means of earthing screw or discharging hoses
must take place before bringing the pump into
thepotentiallyexplosiveenvironment.
All connected pipes, components
and hoses must be electro-conduc-
tive (discharge resistance <1 mega
ohm meter; surface resistance <
giga ohm).
When using the pump in zone 0, the
exhaust air from the pump must be
discharged from the explosive envi-
ronment via electro-conductive pip-
ing or an electro-conductive hose.
When using the pump in zone 0, the
pump must be fixed directly to the
ground without any damping ele-
ments.
10.1.4 Vibration distance
Wheninstallingthepump,ensureasucient
distance (DH15 to DH40 of at least 5 cm; DH50
and DH80 of at least 10 cm) between pump and
othercomponents,excepttheconnections.
10.1.5 Equipment category 1
accessories
For installed electrical components, the manu-
facturer’sowndeclarationofconformitymustbe
observed.
10.1.5.1 The level control
Earthing must be provided when a
level control is installed
10.2 Equipment category 2
see 3.11, 3.13 10.1.3, 10.1.5.1, 10.4,
10.3 Temperature information for
category 1 and 2 equipment
10.3.1 Surface temperature
When used as intended, the pump will not get
hot, ensuring a near-ambient or pumped me-
dium temperature. All moving parts are cooled
bytheexpandingdriveair(gas).However,due
to the high medium temperature the surface of
the pump may also reach the temperature of the
medium.
10.3.2 Pumped medium temperature
Note: The pump's maximum
pumped medium temperature is
limited by the diaphragm materi-
als, see Table 7:
The temperature class of the
pump T6-T4 indicates that the
pump does not act as its own
additional heat source.
Air supply
Example
Table 7: max. pumped medium temperature
Diaphragm materi-
als
Code Max (°C)
nopped E4
®
PTFE
compound
Z 130
EPDM
2 105
NBR
1 90
10.3.3 Ambient temperatures
Ambient temperature range for operation: -20°C
to+40°Celsius.
Fig. 24: Installation instructions for the level control