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4-1
IM 1F5B2-01E
4. MOUNTING
4. MOUNTING
Before mounting ULTRA YEWFLO, see Section 2.4, “Precautions Regarding Installa-
tion Location.” For the environmental conditions of the installation location, see Section
9.1, “Standard Specifications.”
4.1 Piping Precautions
IMPORTANT
Be sure to observe the precautions in this section. Failure to observe these precau-
tions will result in an adverse effect to your flowrate measurement.
IMPORTANT
Avoid mounting ULTRA YEWFLO on a pipeline where:
the process fluid is mixed with bubbles of gas.
the process fluid is mixed with an excessive amount of slurry or foreign matter that
has accumulated on the inner walls.
•a highly pulsating flow or pressure is present.
Valve Mounting and Straight Lengths of a Pipeline
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 below. Keep 5D or more for downstream straight
pipe length.
YEWFLO
5D or more
Flow
Valve
Refer to each
element below for
straight pipe run.
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 (for /HAC version is 30D), and the
downstream straight pipe length be 5D or more.
Flow
YEWFLO
Valve
5D or more
20D or more
(/HAC version 30D)
Figure 4.1-1 Valve Mounting and Straight Lengths of Pipe
14


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