Richter NKLP-C Series Butterfly Valves - Manual (Page 11)

Series NKS-C, NKSP-C, NKL-C, NKLP-C
Page 11
9520-072-en Revision 03
TM 8668 Edition 10/2012
2 Notes on safety
This operating manual contains fundamental infor-
mation which is to be observed during installation,
operation and maintenance.
It must therefore 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 qual-
ified 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 func-
tion may be put at risk if this safety symbol is
not observed.
It is imperative to observe warnings and signs at-
tached 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 follow-
ing 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
Shut-off and control butterfly valves are pressure-
maintaining components in accordance with the Ger-
man Pressure Equipment Directive (DGRL) for the
passage and shut-off of fluids. The valves are suitable
for vapours, gases and liquids of group 1 according to
the DGRL and have a corrosion-resistant plastic lin-
ing.
The field of application for the shut-off and control
butterfly valves include:
♦ Light and medium corrosive, pure and slightly sol-
ids-laden liquids, vapours 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 aggressive
media, are cheaper and beneficial for thorough valve
cleaning.
With both body designs the butterfly valves can be
installed as a wafer-style valve (sandwich-type butter-
fly valve).
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, leaks, 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 careful-
ly examine whether the design of the valve, accesso-
ries and materials are suitable for the new application
(consult the manufacturer).
2.2 For the customer / operator
If a safety 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 cus-
tomer against being touched
♦ the valve has been properly installed in the pipe
system
♦ the operating conditions stipulated in the data
sheet are not exceeded in continuous operating
mode.
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 unauthorized 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 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 identifi-
cation plate and in the pressure-temperature
diagram must under no circumstances be
exceeded.