Richter NK/F series, Инструкция по установке и эксплуатации

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Series NK/F, NKP/F, NKS/F, NKSP/F, NKL/F, NKLP/F
Page 8
9520-070-en
Revision 10
TM 8361 Edition 10/2010
1.8 Breakaway torques
Nom. size
Md
erf
Md
max
[mm] [inch] [Nm] [Nm]
50 2“ 20 100
80 3“ 46 180
100 4“ 63 360
150 6“ 128 725
200 8“ 185 775
250 10“ 287 1435
300 12“ 410 1775
350 14“ 550 3000
400 16“ 650 3500
1.9 Cavitation coefficient z for
75% duty
Nom. size (bei kv/kvs = 75 %)
[mm] [inch] z
50 2“ 0,32
80 3“ 0,30
100 4“ 0,29
150 6“ 0,26
200 8“ 0,23
250 10“ 0,19
300 12“ 0,16
350 14“ 0,14
400 16“ 0,12
2 Notes on safety
This operating manual contains fundamental
information 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, operation and maintenance 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 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 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
according to the DGRL 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.
With all 3 body versions the valves can be installed as
a wafer-stylevalve (intermediate flange valve), with
lug-style and double-flange body as a flange or dead-
end valve.