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.

© Copyright 2014

TI-S41-10

MI Issue 10

The Spirax Sarco Gilflo flowmetering system consists of 3 major

parts:

1. TheGilflo'B'pipelineunit.Thisisinstalledinthelinewherethe

flow is to be measured. Using impulse pipework, this is

connected to:

2. A differential pressure transmitter which measures the

differential pressure across the Gilflo and converts it into a

4 - 20 mA signal. This signal can then be transmitted to:

3. a - A Chart recorder, EMS / BMS or M750 display unit.

b - An M850 flow computer.

Note: The Gilflo pipeline unit can be used to measure the flow of

most industrial liquids, gases and vapours within the pressure and

temperature limits detailed in the appropriate TI document(s).

M850 - Pressure and / or temperature compensated saturated or

superheated steam. In addition heat metering is possible by

replacing the EL2600 pressure transmitter with an EL2271

temperature transmitter in the condensate return line.

Caution: Steam mass flow transmitters are uniquely configured

at the factory to work with a single, specific Gilflo, ILVA or

M410 orifice plate flowmeter. For correct operation the configured

transmitter must always be installed with its allocated flowmeter.

Labels on the packaging give the serial numbers of the matched

products.

Care must be taken to meet all the requirements of the Installation

and Maintenance Instructions, which are provided with the

equipment.

Installation points to watch:

1. Ensure all pipework is adequately supported and properly

aligned.

2. The Gilflo pipeline unit should be selected on capacity rather

than line size. Where pipe size reduction on steam systems is

necessary, use eccentric reducers to avoid waterlogging.

3. The minimum recommended lengths of straight pipe are 6D

upstream and 3D downstream.

4. Take care to ensure the correct direction of flow as indicated

by the arrow on the flowmeter body.

5. Take precautions to avoid reverse flow through the flowmeter.

6. Avoid installing the flowmeter downstream of a pressure

reducing valve (especially on steam systems) as this may

cause inaccuracies and/or possible damage. Similarly avoid

installing the flowmeter downstream of a partially open valve.

7. Remember that actuated valves may cause rapid pressure

fluctuations which could cause damage.

8. On steam or liquid systems take care to ensure that all impulse

lines remain full to prevent damage to the DP transmitter

through contact with steam or high temperature liquid.

9. For steam applications, care should be taken to ensure

adequate line drainage, trapping etc., to avoid condensate

slugs impacting the flowmeter. Where practicable, steam

separators should be fitted. These should be drained using a

float trap set.

10. For gas applications ensure that the DP cell and impulse lines

are positioned above the pipework. Also ensure that the

impulse lines allow free drainage of moisture away from the

DP cell and back into the pipeline.

All electrical wiring must be carried out to the appropriate

standards. Full wiring interconnection details are included with the

equipment.

For details of how to specify system components refer to the

relevant TI document.

EL2271

Gilflo Flowmeters

System Overview

Description

Note: This drawing is schematic only, please see Installation

and Maintenance Instructions for specific installation

information.

Low DP

transmitter assembly.

temperature

transmitter

High DP

Gilflo

F50C

isolating valves

Impulse pipework

High

Low

EMS /

BEMS

Installation

EL2600

DP

pressure

transmitter

or

M750

display unit

Outputs,

alarms, etc.

Outputs,

alarms, etc.

or

flow computer

(steam / gas)

M850

Electrical wiring

How to order

3.2.14