Richter NKP Series Butterfly Valves - Manual (Page 8)

Series NKL, NKLP, NKS, NKSP, NK, NKP
Page 8
9520-070-en Revision 04
TM 7113 Edition 05/2008
2 Notes of safety
This operating manual contains fundamental informa-
tion which is to be observed during installation, opera-
tion 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 qua-
lified 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 che-
mical effects.
Risk to the environment through leaks of hazar-
dous substances.
2.1 Intended use
Richter shut-off and control butterfly valves are pres-
sure-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 according to
the DGRL and have a corrosion-resistant plastic li-
ning.
The field of application for the shut-off and control
butterfly valves include:
Light and medium corrosive, pure and slightly so-
lids-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.
With all 3 body versions the valves can be installed as
a sandwich-type valve (intermediate flange valve),
with lug-style and double-flange body as a flange or
dead-end 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 custo-
mer 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 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 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.