Onicon F-2600 Uživatelský manuál stáhnout pdf (Strana 20)

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F-2600 & F-2700 Vortex Flow Meter Manual 02/15 - 0808-7 / 19204 Page 20

2.1.2 Unobstructed Flow Requirements

Select an installation site that will minimize possible distortion in the ow prole. Valves,

elbows, control valves and other piping components may cause ow disturbances. Check

your specic piping condition against the examples shown below. In order to achieve

accurate and repeatable performance, install the ow meter using the recommended

number of straight run pipe diameters upstream and downstream of the sensor.

Note: For liquid applications in vertical pipes, avoid installing with ow in the downward

direction because the pipe may not be full at all points. Choose to install the meter with

ow in the upward direction, if possible.

Minimum Required

Upstream Diameters

Minimum Required

Downstream Diameters

No Flow

Straightener

With Flow Straightener No Flow

Straightener

With Flow

Straightener

Example A A C C’ B B

1 10 D N/A N/A N/A 5 D 5 D

2 15 D 10 D 8 D 2 D 5 D 5 D

3 30 D 15 D 13 D 2 D 5 D 5 D

4 10 D N/A N/A N/A 5 D 5 D

5 20 D 10 D 8 D 2 D 5 D 5 D

6 50 D 25 D 23 D 2 D 5 D 5 D

D = Internal diameter of channel.

Figure 4. Recommended Pipe Length Requirements for Installation

Flow straightener

(if used)

Flow straightener

(if used)

Flow straightener

(if used)

Flow straightener (if used)

Flow straightener

(if used)

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 130 131

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Onicon F-2600 Uživatelský manuál Strana 20