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IM 1F6A0-01E
3-2
3. INSTALLATION
Table 3.1 Installation
Description
Figure
Refer to each element above for
straight pipe run.
Reducer pipe:
Ensure the upstream straight pipe length to be 5D or more, and the
downstream straight pipe length to be 5D or more for per reducer
pipe.
(D: nominal YEWFLO diameter)
Valve position and straight pipe length:
■
Install the valve on the downstream side of the flowmeter.
The upstream straight pipe length dependent on the element
located on the upstream such as reducer/expander, bent and
etc., refer to description as above. Keep 5D or more for
downstream straight pipe length.
■
In case the valve has to be installed on the upstream of the
flowmeter, ensure the upstream straight pipe length to be 20D
or more, and the downstream straight pipe length be 5D or more.
Piston-type or plunger pump:
Install the accumulator on the upstream side of YEWFLO to reduce
fluid vibrations.
Expander pipe:
Ensure the upstream straight pipe length to be 10D or more, and
the downstream straight pipe length to be 5D or more for per
expander pipe.
Bent pipe and straight pipe length:
Ensure the upstream straight pipe length to be 10D or more, and
the downstream straight pipe length to be 5D or more for per bent
pipe.
Fluid vibration:
For a gas line which uses a position-type or roots-type blower
compressor or a high-pressure liquid line (about 1MPa or more)
which uses piston-type or plunger-type pump, fluid vibrations may
be produced.
In this case, install valve on the upstream side of YEWFLO.
For inevitable fluid vibration, put a vibration damping device such as
throttling plate or expansion section in the upstream side of
YEWFLO.
Piping support:
Typical vibration immunity level is 1G for normal piping condition.
Piping support shoud be fixed in case of over 1G vibration level.
Installation direction:
If a pipe is always filled with liquids, the pipe can be installed
vertically or at inclined angle.
Adjacent pipes:
The process pipline inner diameter should be larger than
the YEWFLO inner diameter.
Use the following adjacent pipe.
Norminal size 15mm up to 50mm : Sch 40 or less.
Norminal size 80mm up to 300mm : Sch 80 or less.
YEWFLO
Flow
5D or more
Reducer
5D or more
YEWFLO
Flow
10D or more
Expander
5D or more
YEWFLO
Flow
10DxN or more
N: Number of bent pipe
5D or more
F030102-1.EPS
Flow
YEWFLO
Valve
5D or more
20D or more