Yokogawa ADMAG AXW Manual de usuario descargar pdf (Pagina 11)

<3. INSTALLATION>

3-2

IM 01E25D11-01EN

(5) Precautions for Use of Liquid Sealing

Compounds

IMPORTANT

Care must be taken in using liquid sealing

compounds on the piping, as it may have a

negative inuence on the ow indications by

owing out and covering the surfaces of an

electrode or grounding ring. In particular, care

must be taken if a liquid sealing compound is

used in the case of vertical piping.

(6) Service Area

Select locations where there is adequate space to

service installing, wiring, overhauling, etc

(7) Bypass Line

It is recommended to install a bypass line to facilitate

maintenance and zero adjustment.

Bypass valve

Block valve

F0303.ai

Figure 3.1.3 Bypass Line

(8) Supporting the Flowmeter

CAUTION

Do not secure the owmeter separately to

prevent the vibrations, shocks, and expansion

and contraction forces of the piping from

affecting it. Fix the pipeline or its anges rst,

then let them support the owmeter.

For vertical, mounting, make sure that the weight

of piping does not weigh on the owmeter.

To release the load from tightening the owmeter

to the pipeline, set a expansive pipe in the

downstream side.

(9) Mounting Positions

• Pipes must be fully lled with liquids.

IMPORTANT

It is essential that pipes remain fully lled at

all times, otherwise ow rate indications may

be affected and measurement errors may be

caused.

Piping shall be designed so as to maintain the

interior of the owtube lled with uids.

Vertical mounting is effective in such cases as

when uids tend to separate or solid matter may be

precipitated. When employing vertical mounting,

direct the uids from the bottom to the top to ensure

that the pipes remain fully lled.

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F0304.ai

(Incorrect)

(Correct)

(Incorrect)

(Correct)

Figure 3.1.4 Mounting Positions

• Avoid air bubbles.

IMPORTANT

If air bubbles enter a measurement pipe,

ow rate indications may be affected and

measurement errors may be caused.

In cases where uids contain air bubbles, piping must

be designed to prevent them from accumulating in

the measurement pipe of a owtube.

If a valve exists near the owmeter, try to mount the

owmeter on the valve’s upstream side in order to

prevent a possible reduction of pressure inside the

pipe, thereby avoiding the possibility of air bubbles.

F0305.ai

Valve

(Incorrect)

(Correct)

(Incorrect)

(Correct)

Figure 3.1.5 Avoiding Air Bubbles

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Yokogawa ADMAG AXW Manual de usuario Pagina 11

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