Spirax Sarco - Catalogo Agosto 2017

3.2.3

Steam

saturatio

curve

Flowmetering

Gilflo and ILVA flowmeters

Local regulations may restrict the use of this product to below the conditions quoted.

In the interests of development and improvement of the product, we reserve the right to change the specification without notice.

TI-P337-05

MI Issue 15

Gilflo ILVA

Flowmeter

Description

The Gilflo ILVA flowmeter operates on the spring loaded variable

area principle and produces a differential pressure related to the

rate of flow. It can be used with most industrial fluids, gases

and both saturated and superheated steam. A general description

of the ILVA flowmetering system and its associated equipment

is given in a separate TI sheet.

Sizes and pipe connections

DN50, DN80, DN100, DN150, DN200. For DN250 and DN300

sizes see separate literature.

Suitable for fitting between the following flanges:

EN 1092 PN16, PN25 and PN40.

BS 10 Table H.

ASME B 16.5 Class 150, 300 and 600.

JIS 20.

KS 20.

The Gilflo ILVA flowmeter should be installed in pipework

manufactured to BS 1600 or ASME B 36.10 Schedule 40.

For different pipe standards/schedules downstream spool

pieces with equivalent internal diameter as in BS 1600 or

ASME B 36.10 Schedule 40 should be used. If this is not

possible, please contact Spirax-Sarco Limited.

Materials

Part

Material

Body

Cast stainless steel S.316 (CF8M / 1.4408)

Internals

431 S29 / S303 / S304 / S316

Spring

Inconel X750

Pressure/temperature limits

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Performance

Pressure bar g

The product must not be used in this region.

The Gilflo ILVA is designed to be used in conjunction with linearising

electronics such as the range of flow computers or M750 display

unit. Alternatively the output signal linearisation can be performed

on an EMS / BEMS or equivalent.

Accuracy when used with Spirax Sarco flow computers or M750:

±1% of measured value from 5% to 100% of maximum rated flow.

±0.1% FSD from 1% to 5% of maximum rated flow.

Repeatability better than 0.25%

Turndown: up to 100:1

Caution: Scanner 2000 steam mass flow transmitters are

uniquely configured at the factory to work with a single, specific

Gilflo ILVA flowmeter. For correct operation the configured

Scanner 2000 transmitter must always be installed with its

allocated flowmeter. Labels on the packaging give the serial

numbers of the matched products.

Pressure drop

The maximum pressure drop across the Gilflo ILVA pipeline unit

is 498 m bar (200 ins water gauge) at maximum rated flow.

Flow capacity

To determine the capacity of the Gilflo ILVA for different fluids, it

is necessary to calculate the equivalent water flowrate Q (in l / min)

as described in Step 1, under the section 'sizing the Gilflo ILVA'

then selecting the appropriate size of flowmeter from the Table

under Step 2 overleaf.

How to order

Example: 1 off Spirax Sarco DN150 Gilflo ILVA flowmeter for

installation between flanges to EN 1092 PN40. Body material

316 stainless steel. Flow medium saturated steam at 10 bar g,

maximum flow 8 000 kg / h.

Body design conditions

PMA Maximum allowable pressure

TMA Maximum allowable temperature

Minimum allowable temperature

ASME 600

102 bar g @ 20°C

400°C @ 40 bar g

-50°C

PMO

Maximum operating pressure is dependant on the flange

specification

Minimum operating pressure

TMO Maximum operating temperature

Minimum operating temperature

0.6 bar g

400°C @ 40 bar g

-29°C

Note: For lower operating temperatures consult Spirax Sarco

Maximum viscosity

30 centipoise

DPMX Maximum differential pressure

498 m bar

Designed for a maximum cold hydraulic test pressure of 155 bar g