Intended use
Ex label of dosing pump and motor
8
© Lutz-Jesco GmbH 2018
BA-10407-02-V08
Motor-driven diaphragm dosing pump
MEMDOS LB
Operating instructions
3 Intended use
3.1 Notes on product warranty
Any non-designated use of the product can compromise its function or
intended protection. This leads to invalidation of any warranty claims!
Please note that liability is on the side of the user in the following cases:
n
The dosing pump is operated in a manner which is not consistent with
these operating instructions, particularly safety instructions, handling
instructions and the section "Intended Use".
n
If people operate the product who are not adequately qualified to carry
out their respective activities.
n
No original spare parts or accessories are used.
n
Unauthorised changes are made to the device.
n
The user uses different dosing media than those indicated in the or-
der.
n
The user does not use dosing media under the conditions agreed with
the manufacturer such as modified concentration, density, tempera-
ture, contamination, etc.
3.2 Intended purpose
The dosing pump MEMDOS LB is intended for the following purpose: the
conveying and dosing of liquids.
3.3 Principles
n
Before delivery, the manufacturer inspected the dosing pump and op-
erated it under specific conditions (with a specific dosing medium
with a specific density and temperature, with specific pipe dimen-
sions, etc.) Since these conditions differ at every location of usage,
the delivery capacity of the dosing pump should be measured by
gauging it at the operating company's installation. For details on the
approximate values and the capacity of the dosing pump, refer to the
chapter 15 “Delivery characteristic curves” on page 38.
n
Comply with the information regarding the operating and environmen-
tal conditions (see chapter "Technical data").
n
Any restrictions regarding the viscosity, temperature and density of
dosing media must be followed. You must only use dosing media at
temperatures above freezing point or below the boiling point of the re-
spective medium.
n
The materials of the dosing pump and hydraulic parts of the system
must be suitable for the dosing medium that is used. In this connec-
tion, note that the resistance of these components can change in de-
pendence on the temperature of the media and the operating pres-
sure.
i
Information on the suitability of materials combined with dif-
ferent dosing media can be found in the Compatibility Chart of
the manufacturer.
The information in this resistance list is based on information
from the material manufacturers and on expertise obtained
from handling the materials.
As the durability of the materials depends on many factors, this
list only constitutes initial guidance on selecting material. In all
cases, test the equipment with the chemicals you use under
operating conditions.
n
The dosing pump is not intended for outdoor use unless appropriate
protective measures have been taken.
n
Avoid leaks of liquids and dust into the casing and avoid direct expo-
sure to sunlight.
n
You must never operate dosing pumps in a potentially explosive at-
mosphere if they do not have corresponding nameplates or an appro-
priate EC Declaration of Conformity for potentially explosive atmos-
pheres.
3.4 Prohibited dosing media
The dosing pump must not be used for these media and substances:
n
Gaseous media,
n
Radioactive media,
n
Solid substances,
n
Flammable media, if adequate protective measures are not taken,
n
All other media that are not suitable for delivery using this dosing
pump.
3.5 Use in explosion risk areas
n
The MEMDOS LB dosing pump with ATEX certification is an electric
motor-driven, explosion protected of equipment group II, equipment
category 2G. When used with an explosion-protected motor, it is used
to supply and dose fluids in zone 1 and 2 explosion risk areas.
n
When using the dosing pumps in explosion risk areas, you must ob-
serve the minimum requirements concerning zoning. The explosion
group, category and type of protection which is indicated in the label-
ling, must meet or be better than the requirements for the intended
area of use.
n
The operating instructions for the explosion protected motor which
are included in delivery must also be observed.
3.6 Ex label of dosing pump and motor
Dosing pumps for use in zone 1 explosion risk areas carry the label: II 2G
Ex h IIC T4 - PTB 12 ATEX D036.
Motors for use in zone 1 explosion risk areas carry the label: II 2G Ex de
IIC T4.
Dosing pumps for use in zone 2 explosion risk areas carry the label: II 2G
Ex h IIC T4 - PTB 12 ATEX D036.
Motors for use in zone 2 explosion risk areas carry the label: II 2G Ex e IIC
T3.
This information can also be found on the ratings plate on the dosing
pump and the ratings plate on the motor.
