Series NKS-N, NKSP-N
Page
7
9520-021-en
Revision 17
TM 10477
Edition 05/2022
2
Notes on safety
This
operating
manual
contains
fundamental
information which is to be observed during installation,
operation and maintenance. It must be read before
installation and commissioning!
For valves which are used in potentially explosive
areas, see
Section 3
.
Installation and operation are to be performed by
qualified staff.
The area of responsibility, authority and supervision of
the staff must be regulated by the customer.
General hazard symbol!
People may be put at risk.
Safety symbol!
The ball valve and its
function may be put at risk if this safety
symbol is not observed.
It is imperative to observe warnings and signs
attached directly to the ball valve and they are to be
kept fully legible.
Non-observance of the notes on safety may result
in the loss of any and all claims for damages.
For example, non-observance may involve the
following hazards:
♦
Failure of important functions of the valve/plant.
♦
Risk to people from electric, mechanical and
chemical effects.
♦
Risk to the environment through leaks of hazard-
ous substances.
2.1 Intended use
Richter shut-off and control butterfly valves are
pressure-maintaining components in accordance with
the German Pressure Equipment Directive (DGRL) for
the passage and shut-off of fluids. The valves are
suitable for vapours, gases and liquids of group 1 in
accordance with the PED and have a corrosion-
resistant plastic lining.
The field of application for the shut-off and control
butterfly valves include:
♦
Light and medium corrosive, pure and slightly
solids-laden liquids, vaopours and gases
♦
Materials in contact with the medium which are
FDA-compliant can be used for food and pharma-
ceutical feedstock as well as in biochemistry.
♦
Powdered and granulated non or low abrasive
solids
Shut-off and control butterfly valves with a plastic-
lined disc/stem unit are used for highly aggressive,
corrosive media.
Shut-off and control butterfly valves with a stainless
steel disc/stem unit are suitable for less agressive
media, are cheaper and benficial for thorough valve
cleaning.
Product features:
♦
Wide sealing surfaces of the body lining
♦
Long valve neck for optimum heat insulation
♦
Maintenance-free, self-adjusting stem seal
Solids can lead to increased wear, damage to sealing
surfaces or to a reduction in the service life of the
valve.
The operator must carefully examine in the event of
operating data other than those provided whether the
designs of the valve, accessories and materials are
suitable for the new application (consult the
manufacturer).
2.2 For the customer / operator
When using the valve, it must be ensured 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.
Loads caused by earthquakes were not allowed for in
the design.
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.
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.
