Metreg MQM Manuale utente

livinggas.

Metreg Technologies GmbH

MQM

Quantometers

Manual

Quantometers

www.metreg-technologies.de

MQM_Manual_EN_16.01.2015

©2014MetregTechnologiesGmbH•Design:www.reidelsoltaugrakdesign.de

MQM

Quantometers

Manual

Quantometers

www.metreg-technologies.de

Table of Content

Manual MQM Quantometers

1. Purpose of this Manual ................................................................................................ 5

2. Basic safety instructions ............................................................................................... 5

3. Declaration................................................................................................................. 6

4. Use and Scope of Quantometers ................................................................................... 6

5. DesignoftheMQMQuantometer................................................................................. 6

6. TechnicalData......................................................................................................... 7-8

7. Installation .............................................................................................................. 8-9

8. MountingPosition/DirectionofFlow........................................................................... 9

9. Preliminarywork.................................................................................................. 10-11

10. Lubrication and Maintenance of the MQM Quantometer .............................................. 12

11. Maintenance of MQM Quantometers ......................................................................... 13

12. Commissioning of the MQM Quantometer .................................................................. 13

13. DecommissioningprocedureoftheMQMQuantometer.............................................. 13

14. Pulse Generators .................................................................................................. 14-15

15. Pressure Measuring Point ........................................................................................... 16

16. Temperature Measuring Point ................................................................................... 16

17. Cleaning ................................................................................................................... 17

18. Transport and Storage ............................................................................................... 17

19. Annex A ................................................................................................................... 18

20. Annex B .................................................................................................................... 19

1. Purpose of this Manual

The instruction manual is dedicated to technical sta with adequate training and technical

knowledgeinthesectorofgasdistributionindustryaccordingtotheapplicabletechnical

lawsandrequirements.ForexamplestawhoareeducatedaccordingDVGWcodesof

practice G 492 and / or G 495.

2. Basic safety instructions

Requirements for the personnel

Theoperationalstamustbequalied,instructedandauthorizedaccordingtheassigned

functions.Allserviceandmaintenanceworkshallbeperformedexclusivelybypersonswith

provenexpertknowledge,includingknowledgeofoccupationalsafetyandenvironmental

protection.

Protectiveactionshavetobedenedaccordingthelegalregulations.

Designated use

The MQM Quantometer is designed for in-plant volume measurement of combustible gases

ofthe1.,2.and3.gasfamily(naturalgas,towngas,propane,butaneandothers),puriedand

driedbiogasaswellasotherinert,non-aggressiveandnon-explosivegasesandgasmixtures.

The permissible operating pressure range reaches up to 20 bar dependent on the design of

themeter,thetemperaturerangerunsfrom-20°Cto+60°C.

The manufacturer is not liable for damage caused by improper or not-designated use.

Safety at work

Weartherequiredpersonalprotectiveequipmentaccordingtofederal/nationalregulations.

Operational safety

The device is permitted to operate in technical faultless and fail-safe condition only.

Responsible is the operator.

Product safety

Thismeasuringdeviceisdesigned,manufacturedandtestedaccordingthestate-of-art

demands. It meets all legal requirements and complies with the EC directives.

Themanufacturerconrmsthedevice-specicECDeclarationofConformityby

xingtheCEmarktothedevice.

The device has left the factory in perfect condition.

Warrantycouldbeextendedonlyincaseofproperinstallationandoperationaccording

to this manual.

3. Declaration

Declaration of Conformity (AnnexA)

4. Use and Scope of Quantometers

TheQuantometerMQMisdesignedfornonescalorin-plantmeteringofnaturalgasand

approved according the European guidelines of 97/23/EG. The MQM Quantometer is suitable

tobeinstalledinhazardousareaofCategory2(Zone1)II2GcIICT4X.

TheMQMQuantometerissuitableforthefollowinggases:

•Naturalgas,towngas,propane,butane,ethylene,air,nitrogen,noblegases

•Furthergasesonrequest.

TheMQMQuantometercannotbeusedfor:Oxygen,Acetyleneandotheraggressivegases

as well as for explosive gases and gas mixtures. The meter should not be used in applications

with the presence of strong pulsations. These conditions will result in an increased error and

maysignicantlydecreasethemeter’slifetime.

5. Design of the MQM Quantometer

Zähleraufbau

1 Meter housing

2 Turbine rotor

3 Meter index head

4 Magnet coupling

5 Flowconditioner

6 Measuring unit housing

7Measuring unit

Note: In case of failure or damage:

Repairs are only allowed to be done

by qualied and authorized repair centers.

Fig. 1: Sectional view of MQM Quantometer

6. Technical Data

Meter type MQM Quantometer

Approval PED97/23/EC

Size G 10 to G 1000

Nominal diameter DN25(2“)toDN150(6“)

Pressure rating PN 16 and ANSI CLASS 150

Rangeability 20:1orhigherdependingontheoperationpressure

Temperature ranges

• gastemperature -20°Cto+60°C

• ambienttemperature -25°Cto+55°C

• storagetemperature -25°Cto+55°C

Housing material Aluminum

Max. operation pressure 20 barg

Accuracy Qmin ≤ Q < Qt:±3.0%

Qt ≤ Q ≤ Qmax:±1.5%

Qt=0,2Qmax

Meter index

Number of indexes 1

Number of digit rollers per index 8

Meterindexhead Composite(optional:Aluminum)

Protection class IP 65

Pulse generators

LF-pulse generator 1LF(reedcontact),add.1LFasoption

Contact type makecontact(normallyopen)

Max. contact load 10W

Max. switching voltage 50VDC/200VDC

Max. switching current 0.1 A / 0.5 A

Resistance 100 Ω in series to reed contact

Max. switching frequency fmax 500Hz

HF-pulse generator: 1HF(inductivesensor,acc.NAMURspecs)

Supplyvoltage 8.2VDC(internalresistanceof1kΩ)

Currentconsumption(sensorcovered) <1mA

Currentconsumption(sensorfree) >2.1mA

Max. switching frequency fmax 1500Hz

Anti tampering contact 1 Reed contact in series with 100 Ω resistor

Contacttype makecontact(normallyclosed)

Max.contactload 10W

Max.switchingvoltage 175VDC

Max. switching current 0.25 A

Resistance 100 Ω in series to reed contact

Rangeability and pulse weighting data

*)Theabsolutenumberofthepulsesdependsonthemetersizeandtheindividualmeteritself.

Thestatedvaluesareoftypicalsize.Exactvaluesdeterminedbycalibrationofthemeterare

located on the nameplate.

7. Installation

Recommendations and requirements for the installation of the MQM Quantometer:

•Preferably,themetershouldbeinstalledhorizontally,withindexheadupward.

•Straightinletpipe≥5DNandoutletpipe≥1DNinthenominalpipediameter

is recommended for high accuracy.

•Ensure that the gas ow is in the same direction as shown by the arrow

at the meter housing.

•Avoid heavy vibrations and pulsations in the point of measurement.

 Installationofasuitablecompensatorcaneectivelydampdownthiskindofdisturbance.

•Drasticchangesinthegasowaswellasstronglypulsatingowwillincreasethe

measuring error. They arise for example during frequently switching on-o of

solenoid valves. The pressure impulses by opening the valve very fast may damage

the ball bearings of the turbine rotor and cause failure of the Quantometer.

•Filter(smallmeshsize)shouldbeinstalledupstreamofthemetertoprotectitfrom

 anycontamination(suspendedparticles>50µm)duringstart-upandoperation.

DN [mm] G-Type Qmin [m3/h] Qmax [m3/h] HF *) [imp/m3] NF [imp/m3]

25 10 2 16 140000 10

 25 16 2,5 25 140000 10

25 25 4 40 140000 10

 50 40 6,5 65 10400 10

50 65 10 100 10400 10

80 100 8 160 27000 1

 80 160 12,5 250 27000 1

80 250 20 400 27000 1

 100 160 12,5 250 13500 1

100 250 20 400 13500 1

100 400 32 650 13500 1

150 400 32 650 5400 1

150 650 50 1000 5400 1

150 1000 80 1600 5400 1

•The gas should be dry. If condensate may be occur then the installation

of a condensation trap upstream of the meter is recommended

 (insomeltertypesitisintegrated).Inthiscasechoose

o Flowdirectionfromtoptobottom

o DoNotinstallthemeteratthelowestpointofthepiping

Attention: The MQM Quantometer is not suitable for oxygen and other highly

corrosive gases as well as for explosive gases and gas mixtures.

8. Mounting Position / Direction of Flow

There are two positions of installation possible for the turbine gas meter:

Horizontal installation or vertical installation

Figure 2: Typical horizontal installation of the MQM Quantometer (recommended)

Figure 3: Typical vertical installation of the MQM turbine gas meter (only DN ≤ 150)

Notice: Ensure that the gas ow is in the same direction as shown by the arrow at the meter housing.

By-pass

Isolation valve

Isolation

valve

Filter

MQM

Ventil

By-pass

Isolation valve

Isolation

valve

Filter

MQM

Isolation valve

9. Preliminary work

Before the installation of the meter please make sure that the following steps

has been observed:

1. Remove the plastic cover sheets the inlet and outlet of the meter.

2.Inspectthemeterforcompleteness(e.g.plugs,providedoilvolume)

and for absence of any transport damages.

3. Cleantheangesurfaces(e.g.withpetroleum).

4. Checkbyblowingintothemeterthatturbinerotorrotateseasilyandstopssmoothly.

5. Priortothemeter’sinstallationcheckthatnocontaminations,condensate,dirtanddebris

are in the pipe. Especially the cleaning of elbows in vertical installations is important

 topreventdamageofthemeterbycontaminations,dirtanddebrispassing.Acone-shaped

 start-upsievemaybeinstalledforinitialoperation.After4-6weeksitshouldberemoved

 toavoidperturbationsoftheowprolewithresultingdecreaseoftheaccuracy.

6. Makesurethatthereisnointrusionofthesealingelementintothepipeduringinstallation

 andoperation(concentricmounting).

7. Checkthatinadditiontothemeter-lengththereisenoughinstallationspacefor

the two seals between inlet and outlet anges.

8. The meter must be installed stress-free. Therefore in addition to point 7 observe strictly the

 properalignmentoftheQuantometer’sinlettooutletaxiswiththeconnectingpipingaxis.

Necessary equipment fort he meter installation:

1.Suitable and certied gaskets:

•

DimensionsaccordingDINEN1514-1orDIN2690

2. ScrewsaccordingDINISO4014andASMEB1.1

3. NutsaccordingDINENISO4032andASMEB1.1

DN Pressure Flanges according ANSI B 16.5

[mm] ANSI Class Stud bolts with continuous thread and nuts

Min. Operating Number Strength Strength

temperatur of of screws class class

the screws screws screws

and nuts

 25 150 -25°C 4xM12 ASTMA193 ASTMA194

Grade B7 Grade 2H

 50 150 -25°C 4xM16 ASTMA193 ASTMA194

Grade B7 Grade 2H

 80 150 -25°C 8xM16 ASTMA193 ASTMA194

Grade B7 Grade 2H

 100 150 -25°C 8xM16 ASTMA193 ASTMA194

Grade B7 Grade 2H

   150 150 -25°C 8xM20 ASTMA193 ASTMA194

Grade B7 Grade 2H

Indice

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