- 7 -
EN
951-180-074-EN Version
03, last updated 2019 / 07
1
1. Safety instructions
1. Safety instructions
Only gerotor pump units of series 143
tested and
approved by SKF in accordance with ATEX
Directive 2014/34/EU are permitted to be
used in potentially explosive atmospheres.
The relevant class of explosion protection is
indicated on the gerotor pump unit’s rating
plate.
1.1 Special safety instructions regarding
explosion protection
○
Always behave so as to avoid explosion
hazards.
○
A written work authorization from the
operator is required prior to initiating
work in potentially explosive atmo-
spheres. Unauthorized persons must be
kept away.
○
There must be no evidence that parts of
the explosion protection are missing or
non-functional. If this is not excluded,
switch off the machine/gerotor pump unit
and immediately notify the supervisor.
○
Explosion protection measures must
never be deactivated, changed, or
bypassed.
○
The introduction of ignition sources such
as sparks, open flames, and hot surfaces
into potentially explosive atmospheres is
prohibited.
○
Inspect the product at regular intervals
for damage that may present a risk of
ignition.
○
The lubricant’s ignition temperature has
to be at least 50 kelvin above the maxi-
mum permissible surface temperature.
○
Use only tools and clothing approved for
use in potentially explosive atmospheres
(ESD).
○
Transport/assembly/repairs and work on
electrical components may be performed
only if it is ensured that there is no ex-
plosive atmosphere present.
○
Repairs or modifications to explosion-
proof machinery may be performed only
by the manufacturer or a workshop rec-
ognized by a notified body and accepted
by the manufacturer. If the work is not
performed by the manufacturer itself, the
repair must be accepted and approved
in writing by a recognized expert. The
repair is marked by a repair sign on the
machine containing the following infor-
mation:
- Date
- Executing company
- Type of repair
- If applicable, mark by expert
○
Shipping damage may lead to the loss of
explosion protection. If there is apparent
shipping damage, do not install/put into
operation the product.
○
All parts of the grounding concept must
be properly present and connected with
the main machine.
○
If lifting eyes are removed after installa-
tion, seal the threaded holes according to
the protection class.
○
Handle components of the product in
such a way that no sparks may arise
from tilting, dropping, slipping, rubbing,
or striking. If necessary, cover compo-
nents by appropriate means.
○
Fill level monitoring with min. pre-warn-
ing and max. must be provided or appro-
priate organizational measures taken to
monitor the temperature of the bearings.
○
Prevent/immediately remove accu-
mulated dust. Accumulated dust has a
thermal insulating effect and promotes
the formation of a potentially explosive
atmosphere when agitated/swirled.
○
The product must be integrated into the
operator’s lightning protection scheme.
○
All parts must be inspected for corro-
sion on a regular basis. Replace affected
parts.
○
Terminal boxes must be securely closed
and the cable glands properly sealed.
○
Any additional electrical monitoring
equipment must be securely connected
and correctly configured.
○
The motor bearings must be replaced
once they reach their nominal service life
or they must be inspected to verify suit-
ability for further use. (see Chapter 9
as well as operating instructions from the
motor manufacturer).
o Electrical circuits such as electrical fill
level monitors must be established by an
intrinsically safe circuit, e.g., through the
installation of an ATEX-compliant isolat-
ing switch by the customer.
o Any components connected or flanged
to the ATEX gerotor pump unit must be
ATEX-compliant.
o The motor connection of the gerotor
pump unit is connected in accordance
with the enclosed instructions from the
ATEX motor manufacturer. These instruc-
tions are stored in the motor’s terminal
box.
o The customer must install adequate
overload protection (motor circuit break-
er) for the power consumption of the
gerotor pump motor.
o When installing the gerotor pump unit,
make sure that the setup location is flat
and low-vibration.
o To limit the maximum system pressure,
the customer must install a pressure
regulating valve immediately after the an-
nular gear.
o Only lines that are made of corrosion-
resistant material may be used. These
must also be grounded.
o The user must make sure through the
choice of the lubricant to be delivered
that no reactions capable of serving as an
ignition source will occur in conjunction
with the potentially explosive atmosphere
expected.