Operation Manual

4-1

IM 1F5B2-01E

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