Stübbe DFM 350, Оригинальное руководство по эксплуатации

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Installation and connection
5.3 Install device
Process pipework has been properly prepared.
Process pipework has been secured against unintentional
opening with shut-off values.
Installation position vertical, direction of
fl ow from bottom
to top.
WARNING
Risk of injury and poisoning due to medium spraying out.
Ensure that in case of a break in the measuring tube, no
hazards result from escaping media.
Do not use measuring tube made of PVC for gaseous
media.
WARNING
Risk of injury and poisoning due to medium spraying out.
Use personal protective equipment when carrying out any
work on the
fi tting.
1. Ensure that measuring tube (6) and fl oat (4) are clean and
free of foreign matter.
2. Remove transport lock (holds the fl oat).
3. Ensure that the fl oat (4) can move freely.
5.3.2 Connection with union nut and insert
1. Unscrew both union nuts (1) ( → Figure Layout, Page 5 ).
– Secure fl oat (heavy) from falling
2. Push union nuts (1) onto spigot of process pipes.
Check mounting direction.
3. Weld union end (2) of device to spigot of process pipes.
4. Check
fi t of O-rings.
5. Connect device to the process pipework. Tighten union
nuts (1) by hand only.
5.3.3 Connection with fl ange
1. Prepare pipe ends according to connection type.
2. Radially push the
fi tting and fl at seal between the fl ange
ends.
3. Bolt fi tting and fl ange with fl ange screws, nuts and wa-
shers.
While
doing so, observe tightening torques:
( → 9.2 Tightening torques, Page 12).
5.3.4 If necessary: Attach special scale
1
2
1. With a pen, mark the lowest reading point of the existing
scale on the measuring tube (1).
2. Pull current scale off.
3. Stick new scale on so that the marking on the measuring
tube matches with the lowest reading point (2).
5.4 Performing the hydrostatic test
Perform hydrostatic test using neutral medium, e.g. water.
1. Pressurize the device, ensuring
– Test pressure < 1.5 x P
N
(Nominal pressure)
– Test pressure < P
N
+ 5 bar
– Test pressure < permissible system pressure
2. Check that the device is not leaking.
8 DFM 165 – 350 BA-2016.08.09 EN 300 458