Flowmetering

Vortex flowmeters

3.7.3

Some typical piping configurations / considerations

Upstream Downstream

One 90° elbow before the flowmeter 10 D 5D

Two 90° elbows belore the flowmeter

10 D 5D

Two 90° elbows out of plane before the flowmeter

30 D 5D

Reduction before the flowmeter

10 D 5D

Regulator or valve partially closed

30 D 5D

Materials - Wetted parts

Wing and shedder bar

Flow tube

Electronics enclosure

Aluminium 383

All other parts

Stainless steel and Carbon steel Models 316L or the cast equivalent, CF3M

Stainless steel model (all sizes) 316L or the cast equivalent, CF3M

Carbon steel model (flanged), DN150 (6") and larger ASTM A105, A06 Grade C, and A108 Grade 1018

Approved for NEMA 4x for water tight and dust tight requirements

Physical specifications

Stainless steel 316L and Aluminium 383

Flowmeter classification

Standard

Explosion proof version

Designed to meet NEMA 4X watertight and dust tight specifications

Local indicator and totalizer

FMus certification

FMc is pending

ATEX

Class I, Division II, Groups B,C,D and Dust-ignition Proof for Class II, Division III,

Groups F, and G Hazardous locations.

II3GExnAIICT6Ta

= 0to+60°CIP66

II3DExtcIIICT70°CTa = 0to+60°CIP66

The indicator displays flowrate and total in user-selectable, engineering units. The OLED display has selectable character sizes.

The totalizer enables a pulse output providing a 5 - 999 msec pulse each time the totalizer increments.

Remote mount electonics

Signal cable is provided to mount the electronics enclosure up to 30 m (100 ft) from the flowmeter flow tube, and must be installed

within proper electrical conduit.

Straight run piping requirements

Typical 10 diameters upstream, 5 diameters downstream. In certain applications where multiple bends or butterfly valves are present,

more straight run may be required.

Other installation considerations

Installation

A flowmeter can be installed vertically, horizontally, or at any

angle. For liquid service, the flow line must remain full during

flowmeter operation.

Site selection

The flow measurement location should be selected to minimize

turbulence and swirl. The extent of these flow disturbances

depends upon the piping configuration. Valves, elbows,

pumps and other piping components may add disturbances

to the flow.

Serviceability

The sensor element and temperature sensor can be

removed, and replaced, without removing the flowmeter

body from the process line, and without process shut

down for process pressures below 52 bar g (750 psi g).

The flowmeter K-factor is not affected by sensor or electronics

servicing.

Pressure tap

The pressure tap should be mounted 3.5 to 7 pipe diameters

downstream from the flowmeter. See Figure 1.

3.5 to 7

internal diameters

Flow

Pressure

transmitter

Fig. 1 Pressure tap dimensions

TI-P338-26 MI Issue 4

VLM10 In-line Vortex Mass Flowmeter

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