Series PA/F, PA/S
Page
6
9510-010-en
Revision 18
TM 9549
Edition 11/2018
2.2 For the customer / operator
If a valve is used, the operator must ensure that
♦
hot or cold valve parts are protected by the cus-
tomer against being touched
♦
the valve has been properly installed in the pipe sys-
tem
♦
the usual flow rates are not exceeded in continuous
operation.
♦
an appropriate collection system is used to contain
drip leaks/leaks locally and harmlessly.
This is not the manufacturer's responsibility.
Loads caused by earthquakes were not allowed for in
the design.
Fire protection to DIN EN ISO 10497 is not possible
(plastic lining and plastic components).
2.3 Improper operation
The operational reliability of the valve supplied is only
guaranteed if it is used properly in accordance with
Section 2.1
of this operating manual.
The operation limits specified on the name
plate and in the pressure-temperature dia-
gram must under no circumstances be ex-
ceeded.
3 Safety notes for applications in potentially explosive areas
based on the Directive 2014/34/ EC (ATEX)
The valves are intended for use in a potentially explo-
sive area and are therefore subject to the conformity
assessment procedure of the directive 2014/34/EC
(ATEX).
As part of this conformity assessment, an ignition haz-
ard analysis to EN 13463-1 to satisfy the fundamental
safety and health requirements was conducted with the
following result:
♦
The valves do not have any ignition source of
their own and can be operated both manually as
well as mechanically/electrically.
♦
The valves are not covered by the scope of ap-
plication of the ATEX directive and therefore do
not need to be identified accordingly.
♦
The valves may be used in a potentially explo-
sive area.
Supplementary notes:
♦
Electric/mechanical actuators must be sub-
jected to their own conformity assessment to
ATEX.
It is imperative to observe the individual points of in-
tended use for application in a potentially explosive
area.
3.1 Intended use
Inadmissible modes of operation, even for brief
periods, may result in serious damage to the unit.
In connection with explosion protection, potential
sources of ignition (overheating, electrostatic and
induced charges, mechanical and electric sparks) may
result from these inadmissible modes of operation; their
occurrence can only be prevented by adhering to the
intended use.
Furthermore, reference is made in this connection to
the Directive 95/C332/06 (ATEX 118a) which contains
the minimum regulations for improving the
occupational health and safety of the workers who may
be at risk from an explosive atmosphere.
A difference is made between two cases for the use of
chargeable liquids (conductivity < 10
-8
S/m):
1. Chargeable liquid and non-conductive lining
Charges can occur on the lining surface. As a result,
this can produce discharges inside and outside the
valve.
a) Discharges inside the valve
However, these discharges inside the valve cannot
cause ignitions if the valve is completely filled with
medium.
If the valve is not completely filled with medium, e.g.
during evacuation and filling, the formation of an ex-
plosive atmosphere must be prevented, e.g. by su-
perimposing a layer of nitrogen. It is recommended
to wait 1 hour before removing the valve from the
plant in order to permit the elimination of static peak
charges.
