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 12
9520-070-en
Revision 10
TM 8361 Edition 10/2010
6 Installation
Examine valve for in-transit damage, damaged ball
valves must 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 NK/F - double-flange body
They can be connected for sandwich installation or as
dead-end valves. They have flange bores to ISO
7005-2 PN 10 (DIN 2501 PN 10) or to ASME/ANSI B
16.5 Class 150.
When installed as intermediate flange valves, the pipe
screws are inserted through the flange bores and
serve as a centering aid.
When installed as a dead-end valve, threaded rods
and nuts are used, thus providing an alternative
connection to either pipe side.
Series NKS/F - sandwich body
They are used for sandwich installation. The valve is
clamped between the two pipes.
Series NKL/F - lug-style body
They are suitable as an intermediate flange and dead-
end valve. They have flange bores to ISO 7005-2 PN
10 (DIN 2501 PN 10) to ASME/ANSI B 16.5 Class
150; they permit independent bolting from each other.
On request, through holes can also be provided
instead of the tapped bores.
6.2 Flange caps and gaskets
Leave protective caps on the flanges until just prior to
installation.
Where there is a particularly high risk of damage to
the plastic sealing surfaces, e.g. if the mating flanges
are made of metal or enamel, PTFE-lined gaskets
with a metal inlay should be used. These gaskets are
available as special accessories in the Richter range.
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
preferably 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 1.4 .
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 1.3 .
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
actuation, screw in again hex. screw
901/1 .
Slightly actuate the actuator.
Please pay attention to the drawing in
Section 5.4.
6.5 Earthing
One end of the grounding rope 532 is attached with a
hex. nut 920/1 and a tooth lock washer 936/1 to the
underside of the head flange.
The other end is metallically secured in the plant.
Series NK/F, NKP/F
Butterfly valves with tapped bores are earthed by the
pipe screws.
At the customer's request a setscrew M6 with a hex.
nut and washer will be provided at each flange as an
additional grounding connection.