Richter NKLP-C Series Butterfly Valves - Manual (Page 14)

Series NKS-C, NKSP-C, NKL-C, NKLP-C
Page 14
9520-072-en Revision 03
TM 8668 Edition 10/2012
5.5 Disposal
Parts of the valve may be contaminated with medium
which is detrimental to health and the environment
and therefore cleaning is not sufficient.
Risk of personal injury or damage to the
environment due to the medium!
♦ Wear protective clothing when work is performed
on the valve.
♦ Prior to the disposal of the valve:
 Collect any medium, etc. which has escaped and
dispose of it in accordance with the local regula-
tions.
 Neutralize any medium residues in the valve.
♦ Separate valve materials (plastics, metals etc.)
and dispose of them in accordance with the local
regulations.
6 Installation
♦ Examine valve for in-transit damage, damaged
diaphragm valves may not be installed.
♦ Before installation the valve and the connecting
pipe must be carefully cleaned to remove any dirt,
especially hard foreign matter.
♦ During installation, pay attention to the correct
tightening torque, aligned pipes and tension-free
assembly.
Ensure that a remotely actuated actuator
cannot be accidentally switched on.
6.1 Installation possibilities
Series NKS-C wafer-style body
They are used for sandwich installation. The valve is
clamped between the two pipes. From DN 350 up-
wards a lug-style body with through holes is standard
Series NKL-C lug-style body
They are suitable as an intermediate flange and dead-
end valve.
On request, through holes can also be provided in-
stead of the tapped bores.
6.2 Flange caps and gaskets
Leave the original packaging on the valve until imme-
diately before installation.
NKS-C with TFM body lining does not need any gas-
kets.
If plastic sealing surfaces can be damaged, e.g. by
mating flanges made of metal or enamel, use PTFE-
lined gaskets with a metal inlay.
6.3 Direction of flow and
installation position
Installation is independent of the direction of flow.
Any fitting position can be chosen.
Except solids-containing liquids:
With solid containing media butterfly valves are pref-
erably installed with horizontally positioned stem and
bottom half of disc opening into flow direction.
6.4 Installation
 Can the disc open in the pipeline?
For dimensions see Section 1.5.
 Is the disc open 10 – 15°?
 Mount butterfly valve and gaskets centrically.
 Tighten the piping bolts crosswise and hand-tight.
 By means of a test actuation ensure that the disc is
able to freely rotate.
 With the disc slightly opened, tighten the piping
bolts crosswise. For the torques see Section 1.4.
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.
6.4.1 Additional advice for shut-off and
control butterfly valve with actuator
 For single-acting actuators a locking plate has
been fitted into the bracket, blocking the stem at a
disc opening of 10 – 15°.
 Remove the locking plate before the first test actu-
ation, screw in again hex. screw 901/1. Slightly
actuate the actuator.
Please pay attention to the drawing in Section 5.4.
6.5 Earthing
On request, the butterfly valves are supplied with an
earthing connection.