Series NKS/F, NKSP/F, NKL/F, NKLP/F
Page
9
9520-020-en
Revision 16
TM 10207
Edition 05/2020
Product features:
♦
Wide sealing surfaces of the body lining
♦
Long valve neck for optimum heat insulation
♦
Maintenance-free, self-adjusting stem seal
♦
Leak-proof to the atmosphere in accordance with
the German Clean Air Code
Solids
can lead to increased wear, damage to sealing
surfaces or to a reduction in the service life of the
valve.
In case of the valve is intended for operating data
other than those intended, the customer must
carefully examine whether the design of the valve,
accessories and materials are suitable for the new
application. (Please consult the manufacturer).
2.2 For the customer / operator
If a valve is used, the operator must ensure that
♦
actuators which are retrofitted are adapted to suit
the valve
♦
hot or cold valve parts are protected by the
customer against being touched
♦
the valve has been properly installed in the pipe
system
♦
the usual flow rates are not exceeded in continu-
ous operation.
This is not the manufacturer's responsibility.
Butterfly valves which are used as end
valves must be sealed with a blind flange at
the free connection end and appropriately
secured against unauthorised activation.
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 safety 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
diagram must under no circumstances be
exceeded.
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
explosive 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
hazard 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
application of the ATEX directive and therefore
do not need to be identified accordingly.
♦
The valves may be used in a potentially
explosive area.
Supplementary notes:
♦
Electric/mechanical
actuators
must
be
subjected to their own conformity assessment
to ATEX.
It is imperative to observe the individual points of
intended use for application in a potentially explosive
area.
3.1 Intended use
Improper operation, even for brief periods, may
result in serious damage to the valve.
In connection with explosion protection, potential
sources of ignition (overheating, electrostatic and
induced charges, mechanical and electric sparks)
may result from these improper 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):