Grundfos DMH 25 Series Installation And Operating Instructions, Supplement

English (GB)
6
3.2.2 Dosing head and valves
Grundfos supplies pumps meeting the requirements of
Directive 94/9/EC with appropriately approved dosing head/valve
combinations meeting the requirements of Directive 94/9/EC.
The size of the dosing head (depending on the pump type) and
the dosing head material determine the suitability of the pump for
operation in potentially explosive atmospheres caused by media
of group IIB or IIC:
3.2.3 Motor
Grundfos pumps complying with Directive 94/9/EC are supplied
with motors that are complying with Directive 94/9/EC and have
been tested and labelled accordingly.
Alternatively, pump units can be supplied separately, and in this
case the user must fit a motor that complies with
Directive 94/9/EC.
3.2.4 Pump designation
The information meeting the requirements of Directive 94/9/EC
given on the pump as a non-electrical device depends on the
pump/motor configuration selected.
Pumps with motor are labelled in accordance with
Directive 94/9/EC. However, if the pump is supplied without a
motor, the labelling is only applicable to the pump unit.
Nameplate of the pump unit only (pump supplied without
motor)
Nameplate of pump with motor
Further information about using the pump can be found in section 4. Operating conditions.
Caution
Pumps with other types of dosing head/valve
combination cannot be used in potentially
explosive atmospheres.
Caution
Stainless-steel valves must not be combined with
non-metal dosing heads.
Dosing head
material
Pump types
DMH
251-255
DMH
257
DMH
28x
DMX 226
Head
sizes 1-3
DMX 226
Head
size 4
PVC IIC IIB IIC IIC IIB
Stainless steel,
DIN 1.4571
IIC IIC IIC IIC IIC
Stainless steel,
DIN 2.4610
IIC IIC IIC - -
PP IIC IIB IIC IIC IIB
PVDF IIC IIB IIC IIC IIB
Caution
Pumps with other types of motor cannot be used
in potentially explosive atmospheres.
Pump unit nameplate
Suitable for category 2,
explosion group /
temperature class
II 2GD c IIB T130 °C IIB / 130 °C
II 2GD c IIC T130 °C IIC / 130 °C
Motor nameplate Pump nameplate
Suitable for category 2,
explosion group / temperature class
II 2G Ex e II T3 II 2G IIB T3 IIB / T3
II 2G Ex e II T3 II 2G IIC T3 IIC / T3
II 2GD Ex die IIC T4 II 2GD IIB T4 IIB / T4
II 2GD Ex die IIC T4 II 2GD IIC T4 IIC / T4

Grundfos DMH 25 Series Specifications

General

Brand	Grundfos
Model	DMH 25 Series
Category	Water Pump
Language	English