Spirax Sarco ILVA20 User manual

IM-P3 37- 6 9 EMM Issue 2 1
Abbreviations
1. Safety information
2. General system information
3. General product information
4. Mechanical installation of
ILVA20 pipeline unit
5. Electrical installation
6. Commissioning
7. MVT10 and menu structure
8. Maintenance
9. Spare parts
10.
11. Settings table
12. Appendix
© Copyright 2019
Printed in GB
3374350/2
ILVA20 Flowmeter and
MVT10 Di󰀨erential Pressure Transmitter
for Saturated and Superheated Steam Service
Installation and Maintenance Instructions
IM-P3 37- 6 9
EMM Issue 2

IM-P3 37- 6 9 EMM Issue 2
2
MVT Multi-variable transmitter
EMC Electromagnetic compatibility
ESD Electrostatic discharge
PED Pressure Equipment Directive
ASME American Society of Mechanical Engineers
NPT National Pipe Thread
IEEE Institute of Electrical and Electronic Engineers
IP Ingress protection
ILVA InLine Variable Area
EIA/TIA-485 Electronic/Telecommunication Industrial Association (formally EIA/TIA 485)
AWG American wire gauge
DP Differential pressure
BTU British thermal unit
DMM Digital multimeter
Abbreviations

IM-P3 37- 6 9 EMM Issue 2 3
Safe operation of these products can only be guaranteed if they are properly installed, commissioned,
used and maintained by qualified personnel (see Section 1.11) in compliance with the operating
instructions. General installation and safety instructions for pipeline and plant construction, as
well as the proper use of tools and safety equipment must also be complied with.
Adverse operation to these guidelines can cause damage to the product or connected equipment.
All wiring materials and methods shall comply with relevant EN and IEC standards where applicable.
1.1 Intended use
Referring to the Installation and Maintenance Instructions, name-plate and Technical Information
Sheet, check that the product is suitable for the intended use/application.
The products listed below comply with the requirements of the Pressure Equipment Directive (PED)
and carry the mark.
The products fall within the following Pressure Equipment Directive categories:
Product Group 1
Gases
Group 2
Gases
Group 1
Liquids
Group 2
Liquids
I LVA 2 0
DN150 - DN200 3 3 2 SEP
DN250 - DN300 3 3 2 1
i) Th e p ro d u c t s h av e b e e n s p e c i f i c a l l y d e s i g n e d f o r u s e o n s t e a m w h i c h i s i n G r o u p 2 of t h e a b o v e
mentioned Pressure Equipment Directive.
ii) Check material suitability, pressure and temperature limits, are correct prior to installation.
If the maximum operating limits of the product are lower than those of the system in which it
is being fitted, or if malfunction of the product could result in a dangerous overpressure or
overtemperature occurrence, ensure a safety device is included in the system to prevent such
over-limit situations.
iii) Determine the correct installation situation and direction of fluid flow.
iv) Spirax Sarco products are not intended to withstand external stresses that may be induced
by any system to which they are fitted. It is the responsibility of the installer to consider these
stresses and take adequate precautions to minimise them.
v) R e m o v e p r o t e c t i o n c ov e r s f r o m a l l c o n n e c t i o n s a n d p r o t e c t i v e f i l m f r o m a l l n a m e - p l a t e s , w h e r e
appropriate, before installation on steam or other high temperature applications.
These instructions must be stored in a safe place near the product installation at all times.
1. Safety information

IM-P3 37- 6 9 EMM Issue 2
4
Warning
This product complies with Electromagnetic Compatibility Directive 2014/30/EU and all its
requirements.
The product may be exposed to interference above the limits of Heavy Industrial Immunity if:
- The product or its wiring is located near a radio transmitter
- Excessive electrical noise occurs on the supply. Line protectors can be used with combine
filtering, suppression, surge and spike arrestors.
- Cellular telephones and mobile radios may cause interference if used within approximately
1 metre (39") of the product or its wiring. The actual separation distance necessary will vary
according to the surroundings of the installation and the power of the transmitter.
Electrostatic Discharge (ESD) precautions
Static precautions must be observed at all times to avoid damage to the product.
1.2 Access
Ensure safe access and if necessar y a safe working plat form (suitably guarded) before at tempt ing
to work on the product. Arrange suitable lifting gear if required.
1.3 Lighting
Ensure adequate lighting, particularly where detailed or intricate work is required.
1.4 Hazardous liquids or gases in the pipeline
Consider what is in the pipeline or what may have been in the pipeline at some previous time.
Consider: flammable materials, substances hazardous to health, extremes of temperature.
1.5 Hazardous environment around the product
Consider: explosion risk areas, lack of oxygen (e.g. tanks, pits), dangerous gases, extremes of
temperature, hot surfaces, fire hazard (e.g. during welding), excessive noise, moving machinery.
1.6 The system
Consider the effect on the complete system of the work proposed. Will any proposed action
(e.g. closing isolation valves, electrical isolation) put any other part of the system or any
personnel at risk?
Dangers might include isolation of vents or protective devices or the rendering ineffective of
controls or alarms. Ensure isolation valves are turned on and off in a gradual way to avoid system
shocks.
1.7 Pressure systems
Ensure that any pressure is isolated and safely vented to atmospheric pressure.
Consider double isolation (double block and bleed) and the locking or labelling of closed valves.
Do not assume that the system has depressurised even when the pressure gauge indicates zero.
1.8 Temperature
Allow time for temperature to normalise after isolation to avoid danger of burns.

IM-P3 37- 6 9 EMM Issue 2 5
1.9 Tools and consumables
Before starting work ensure that you have suitable tools and/or consumables available. Use only
genuine Spirax Sarco replacement parts.
1.10 Protective clothing
Consider whether you and/or others in the vicinity require any protective clothing to protect against
the hazards of, for example, chemicals, high/low temperature, radiation, noise, falling objects, and
dangers to eyes and face.
1.11 Permits to work
All work must be carried out or be supervised by a suitably competent person.
Installation and operating personnel should be trained in the correct use of the product according
to the Installation and Maintenance Instructions.
Where a for mal 'permit to work' system is in force it must be complied with. Where there is no such
system, it is recommended that a responsible person should know what work is going on and,
where necessary, arrange to have an assistant whose primary responsibility is safety.
Post 'warning notices' if necessary.
1.12 Handling
Manual handling of large and/or heavy products may present a risk of injury. Lifting, pushing,
pulling, carrying or supporting a load by bodily force can cause injury particularly to the back.
You are advised to assess the risks taking into account the task, the individual, the load and the
working environment and use the appropriate handling method depending on the circumstances
of the work being done.
Safe lifting of Spirax Sarco products
Please note that the Spirax Sarco ILVA20 is supplied with the provision for eyebolts to BS 4278 (to
be s u pp li e d by o t h e r s), wi t h ta pp ed h ol es l oc at ed i n th e b o dy. Th es e may b e us ed f o r li f t i ng p ur po ses
at the sole risk and responsibility of the purchaser.
The purchaser is responsible for all lifting operations and operator competency at their location.
The are also responsible for the use of the correct eyebolt and shackle. Combination eyebolts
MUST NOT be used.
Spirax Sarco will accept no responsibility for loss or damage, caused by incorrect or inappropriate
lifting of our products.
1.13 Residual hazards
In normal use the external surface of the product may be very hot. If used at the maximum
permitted operating conditions the surface temperature of some products may reach temperatures
of 239 °C (462 °F).
Ma ny pro du c t s a r e not s e lf - d r ai n i n g. Ta k e d u e ca r e w h e n dis m a n t li ng or r e m ov in g t h e p ro d u c t f r om
an installation (refer to 'Maintenance instructions').
1.14 Freezing
Provision must be made to protect products which are not self-draining against frost damage in
environments where they may be exposed to temperatures below freezing point.

IM-P3 37- 6 9 EMM Issue 2
6
Certain computer programs contained in this product were developed by Spirax Sarco
("the Work(s)").
Copyright © Spirax Sarco 2018
All rights reserved
Spirax Sarco grants the legal user of this product (or device) the right to use the Work(s)
solely within the scope of the legitimate operation of the product (or device). No other right
is granted under this licence. In particular and without prejudice to the generality of the
foregoing, the Work(s) may not be used, sold, licensed, transferred, copied or reproduced
in whole or in part or in any manner or form other than as expressly granted here without
the prior written consent of Spirax Sarco.
1.15 Returning products
Customers and stockists are reminded that under EC Health, Safety and Environment Law, when
r e t u r n i n g p r o d u c t s t o S p i r a x S a r c o t h e y m u s t p r o v i d e i n f o r m a t i o n o n a n y h a z a r d s a n d t h e p r e c a u t i o n s
to be taken due to contamination residues or mechanical damage which may present a health,
safety or environmental risk. This information must be provided in writing including Health and
Safety data sheets relating to any substances identified as hazardous or potentially hazardous.
1.16 Hot Surfaces
On completing the installation its recommended the installer high light potential hot surfaces on
the ILVA20 body, these are likely to be the 2-way manifold and the needle valves located on the
unit.
1.17 Replacement parts
Only use Spirax Sarco recommend parts as functionality / operation of the unit may otherwise be
impaired
1.18 Disposal
On d is po s al of t h e un it or comp on ent , ap pr op r i at e prec au ti on s sh oul d b e t ake n in ac co r da nc e w it h
Local/National regulations.
Un l e s s oth e r w is e s t a t e d i n t h e I n s t a l l a t i o n a n d Mai n t en a n c e I ns t r u c t i o n s t h i s p r od u c t i s r e c y c l a b l e
and no ecological hazard is anticipated with its disposal providing due care is taken.

IM-P3 37- 6 9 EMM Issue 2 7
2.1 Introduction
This booklet gives full details of the recommended procedures for the installation, maintenance and use of
the Spirax Sarco ILVA20 flowmeter. Abbreviated details of how to install the EL2270 temperature sensor are
also given and full details are supplied with the product.
Initial start-up procedures as well as fault finding guidelines are also included.
Description
The Spirax Sarco DN150 to DN300
 is designed for use on saturated
and superheated steam, it can also
operate as a heat meter. It operates on
the spring loaded variable area principle
and produces a differential pressure
related to the rate of flow. The electronics
provide current loop, pulsed output and
Modbus EIA/TIA485 outputs. Steam flow
is density corrected. Pipeline pressure is
also measured.
Fig. 1 ILVA20 system installation
EMS/BEMS and PLC,
Chart recorders, DAQ etc
ILVA 2 0
MVT10
2. General system information
2.2 The Spirax Sarco ILVA20
flowmetering system
consists of 3 major
elements:
2.2.1 The ILVA20 pipeline unit
This is installed in the line where the flow is to be
measured. Using impulse pipework, this is
connected to:
2.2.2 The MVT10 assembly
The MVT10 assembly measures the differential
pressure and static pressure across the ILVA20
pipeline unit and converts this to a 4-20 mA output
signal or EIA/TIA 485 Modbus proportional to mass
flow or power.
Registered EU Design Application No. 005832607.
2.2.3 Additional equipment required for super heat
applications (sold separately)
EL2270 temperature transmitter (Pt100 to
EN60751: Class A) which is installed directly in the
pipework upstream of the ILVA20 pipeline unit,
enables the unit to measure superheated steam or
operate as a net heat meter.

IM-P3 37- 6 9 EMM Issue 2
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3.1 Sizes and pipe connections
ILVA20: DN150, DN200, DN250 and DN300.
Suitable for fitting between the following flanges:
EN 1092-1 PN16, PN25 and PN40
BS 10 Table H
ASME B16.5 Class 150 and 300
JIS B2220 20K
KS B1503 20K.
3.2 Materials - see Figure 2
No. Part Material
1Flowmeter body Stainless steel 1.4408 CF8M
2Internals Stainless steel 316
32 way manifold Stainless steel 1.4408 CF8M
43 way manifold Stainless steel 316
5Impulse hoses Stainless steel 316L
6MVT housing Aluminium Copper free aluminium, max 0.5 mg
7Pressure sensor Stainless steel
8Spring Inconel X750
9Seals Graphite/stainless steel Graphite faced 316L
10 Screws Stainless steel ASME SA-193 B8M Class 2
3.3 Technical data
Power supply
24 Vdc if it is loop powered (absolute max voltage 28V, 24V +/- 10%)
24 Vdc, 250 mA max when using an EIA/TIA 485
(absolute max voltage 28V, 24V +/- 10%)
Outputs 4-20 mA loop (proportional to mass flow or power), 250 W load max
Pulsed output 
Communications port EIA/TIA 485/Modbus
Fuse type T1A, To be installed externally of the MVT10 unit, in-line with the 24 Vdc power supply
3. General product information

IM-P3 37- 6 9 EMM Issue 2 9
DN150 shown
Hi
Lo
Balance
6
7
4
Fig. 2
Hi
Lo
1
9
10
3
3
5
2
8

IM-P3 37- 6 9 EMM Issue 2
10
0
0
100
200
300
400
239
10 20 30 40 50
32*
3.5 Pressure/temperature limits
Temperature °C
Pressure bar g
Steam
saturation
curve
The product must not be used in this area.
Outside of operating range.
Steam is superheated in this area.
Maximum design pressure 49.6 bar g @ 21 °C
Maximum design temperature 400 °C @ 29.4 bar g
Minimum design temperature 0°C (non-freezing)
Maximum operating pressure * 32 bar g @ 239 °C
Minimum operating pressure 0.6 bar g
Maximum operating temperature (saturation) 239 °C
Minimum operating temperature 0°C (non-freezing)
Maximum electronics ambient temperature 55 °C
Minimum electronic ambient temperature 0 °C
Maximum electronics humidity level 90% RH (non-condensing)
Designed for a maximum cold hydraulic test pressure of: 50 bar g
Glass on the display is rated for impact of maximum 4J
Environment Protection IP65

IM-P3 37- 6 9 EMM Issue 2 11
3.6 ILVA20 Dimensions/weights (approximate) in mm and kg
Size A B C D E F Weight
DN150 75 134 293 218
193 221
17.74
DN200 85 161 354 273 2 7.9 4
DN250 104 204 443 330 46.54
DN300 120 250 535 385 69.94
C
B
A
D
E
F

IM-P3 37- 6 9 EMM Issue 2
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3.7 MVT10 Dimensions/weights (approximate) in mm and kg
The ILVA20/MVT10 can be supplied with either
1 m or 2 m long impulse hoses, with " NPT
screwed ends.
It can also be supplied without hoses, where the
intention is to hard pipe the assembly (hard pipe
supplied by others).
Impulse hoses
Weight
" NPT 1 m 0.5 (pair)
" NPT 2 m 1 (pair)
A
B
C
MVT10 mass flow transmitter, manifold and
impulse hoses and fixing clamp
A B C Weight
209 264 220 8
'U' bolts to suit DN50 pipe

IM-P3 37- 6 9 EMM Issue 2 13
4.1 Environmental conditions
Install the product in an environment that minimises the effects of heat, vibration, shock and electrical
interference (see Section 1 - 'Safety information').
Do not install the product outdoors without additional weather protection.
Caution: In order for the ILVA20 flowmeter to meet its specified accuracy and performance, it is essential
that the following guidelines for installation are followed carefully. For steam flow measurement, good basic
steam engineering practices should be followed as detailed in this manual.
Before lifting the ILVA20/MVT10, refer to Section 1.12, safe lifting of Spirax Sarco products.
Fig. 3 Top views showing lifting ports
See Section 1.12 for handling and lifting procedure
Lifting ports
Lifting points
4. Mechanical installation of ILVA20
pipeline unit
M12
M12
M12
M12

IM-P3 37- 6 9 EMM Issue 2
14
Fig. 4b
Minimum
100 mm
Minimum
100 mm
Fig. 4a
The MVT10 is supplied with a four bolt bracket and two U bolt fixings for mounting to a suitable structure. The
U bolts can be used to clamp the MVT10 to a suitably located pipe or bar up to 60 mm diameter, see Figure 4a.
Caution!
Do not clamp the MVT to another steam pipe. The pipe surface temperature must not exceed 60 °C.
Alternatively, the U bolts can be removed and the four bolt bracket can be directly mounted to a wall or
purpose made bracket, see Figure 4b.
Separator
Isolation valve
Strainer
6D
minimum
3D
minimum
Required installation

IM-P3 37- 6 9 EMM Issue 2 15
Fig. 5
Minimum 100 mm below
steam line
Fig. 6
Fig. 7
4.1 Orientation
The ILVA20 should be installed in a horizontal line. As it has been
calibrated in a horizontal attitude, mounting it in a vertical line
(flow downwards) may introduce a small flow measurement error.
If installation with flow vertically downwards is unavoidable, please
consult Spirax Sarco for advice. The flowmeter should not be installed
with flow vertically upwards (see Figure 8).
The MVT10 must be placed below the steam pipe
(minimum of 100 mm) to aid the filling of the impulse
hoses and ensure correct operation of the system.
Ensure that the impulse hoses do not become 'kinked'
or their route does not have sharp bends.
Kinked
Minimum bend radius for
DN10 braided hose as per
BS EN ISO 10380-2012
is 38mm.

IM-P3 37- 6 9 EMM Issue 2
16
Maximum 45º
Filling plug
Hose connector
Maximum 45º
Fig. 8
Fig. 9
Fig. 10
The ILVA20 must be installed into a horizontal line only.
The ILVA20 can be rotated in a horizontal line by up to 45° (downwards only), see Figure 9.
The filling and hose connector plugs are supplied loose and
thus need to be fitted to suit the orientation of the 2 way
manifold.
The hose connectors need to be fitted to allow for draining
downwards. The filling plugs must then be used on the
opposite or upwards side to plug the remaining holes.

IM-P3 37- 6 9 EMM Issue 2 17
6 D minimum 3 D
minimum
Fig. 11 Flow
D = Pipe inside diameter
ILVA 20
4.2 Upstream/downstream pipework

which corresponds to the following pipeline internal diameters.
Nominal diameter Nominal internal diameter
150 mm 154 mm
200 mm 202 mm
250 mm 254 mm
300 mm 303 mm
For different pipe standards/schedules, if the flowmeter is being operated at the extreme of its published
maximum range, downstream spool pieces manufactured from BS 1600 or ASME B16.19M Schedule 40
must be used.
It is important that the internal upstream and downstream diameters of pipe are smooth. Ideally seamless
pipes should be used and there should be no intrusive weld beads on the internal diameter. It is recommended

The ILVA20 normally only requires a minimum of 6 pipe diameters upstream and 3 downstream of clear straight
pipe. These dimensions assume a measurement from a single 90° bend.
See Figure 11.

IM-P3 37- 6 9 EMM Issue 2
18
If any of the following configurations are present upstream of the ILVA20, then it is recommended that the
minimum upstream clear pipework is doubled to 12 diameters.
Two right angled bends in two planes.
Pressure reducing valve.
Partly open valve.
Avoid installing the ILVA20 flowmeter
downstream of an actuated valve as rapid
cycling of the valve could give rise to inaccurate
results or damage the flowmeter.
See Figure 12.
Note: D = Pipe inside diameter
Fig. 12
Flow
12 D minimum
Flow
12 D minimum
Flow
12 D minimum
I LVA 2 0
I LVA 2 0
I LVA 2 0
Flow
ILVA 20
Fig. 13 Spool piece 

We recommend that a spool piece is used to
aid installation and removal (see Figure 13).
See page 11 for dimensions for manufacturing a spool piece.

IM-P3 37- 6 9 EMM Issue 2 19
I LVA 2 0
Flow
Eccentricity
Flange Gasket
I LVA 2 0
Flow
Flange Gasket
I LVA 2 0
Flow
GasketFlange
It is important that the ILVA20 is located centrally in the pipework as any eccentricity may cause inaccurate
readings. The ILVA20 has been designed with integral centering webs which locate on the internal diameter
of the pipework.
Note: The ILVA20 is calibrated using schedule 40 pipework at the factory.
If the ILVA20 is installed into a system using other schedule pipework (including schedule 80) the calibration
will be affected.
Gaskets protruding
into line
4.3 Location in pipework
Bolt ring gaskets having the same internal diameter of the pipework are recommended. This will prevent
possible inaccuracies being created by the gasket protruding into the pipe.
Fig. 14

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4.4 Pressure tappings
The ILVA20 has a two way manifold with integral pressure tappings for connection to the MVT10 mass
flow transmitter assembly using impulse lines. These are threaded " NPT and are clearly marked HI
(upstream) and LO (downstream). Care should be taken to ensure that these are correctly connected. It
also has filling points to commission the assembly.
The ILVA 20 is supplied with flexible impulse hoses as standard, either 1m or 2m in length (preference should
be made at time of order).
The flexible impulse hoses should follow as near as possible the same route and secured to prevent them
vibrating or being snagged by moving personnel or machinery.
Ensure correct temperature rating of the bracket is used when fixing the hoses.
Fig. 15
HI LO
HI
LO
Filling plugs
Flexible impulse
hoses