Igtm Gas Turbine Meter Brochure 282s48

IGTM Gas Turbine Meter

with electronic outputs and mechanical counter

Gas - Measurement

Documentation and Technical Specifications

General

Operation

The vemm tec IGTM (International Gas Turbine Meter) is a highly accurate flow meter, approved for custody transfer measurement, equipped with electronic pulse outputs and a mechanical counter. This document explains the dimensions, ranges, performance, calibration and outputs of the instrument. It details the installation, safety requirements and material specifications.

The operation of the International Gas Turbine Meter is based on the measurement of the velocity of gas. The flowing gas is accelerated and conditioned by the meter´s straightening section. The straightening vanes prepare the gas flow profile by removing undesired swirl, turbulence and asymmetry before the gas flows to the turbine wheel. The dynamic forces of the flowing fluid cause the rotor to rotate. The turbine wheel is mounted on the main shaft, with special high precision, low friction ball bearings. The turbine wheel has helical blades that have a known angle relative to the gas flow. The conditioned and accelerated gas drives the turbine wheel with an angular velocity that is proportional with the gas velocity.

The IGTM measures gas volume flowing through an annular age in the meter. The flowing gas volume is totalised on a local mechanical counter. In addition, low or high frequency pulse signals are generated to infer the gas flow and volume. The indicated gas volume is the actual volume flowing through the meter at the actual temperature and pressure. The IGTM is available in two models: CT and IM. The IGTM-CT is used for high accuracy and custody transfer applications. The IGTM-IM is an economically priced meter with a good accuracy.

The rotating turbine wheel drives the index head with the eight digit mechanical counter via shafts and gears. The volume and flow rate can also be indicated electronically. A proximity probe generates a signal at each ing blade of the turbine wheel. With the device-specific K-factor and the number of pulses the ed volume can be calculated. With the measured frequency the flow rate can be determined.

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Sizes, Flow Rate and Flanges

Approvals

The available nominal diameter of the IGTM gas turbine meter ranges from 50 mm (2") to 400 mm (16"). Other sizes are available on request.

The IGTM is specifically designed in accordance with all relevant and published standards, like EC directives, EN 12261, AGA 7, ISO 9951, OIML R6, R32, and R137-1. Many national standards and laws are based on the above.

The IGTM can be delivered with G rates ranging from G40 to G4000, which means that IGTMs are available for flow rates from 10 m3/h to 10 000 m3/h. The relationship between G value and flow rate for each diameter is shown in table 3 on the last page of this brochure.

The IGTM-CT meter is approved for custody transfer in all EC (European Community) countries. Metrological approvals are also obtained in Brazil, Bulgaria, Hungary, Czech Republic, Romania, Algeria, Malaysia and China, others are in process.

Carbon steel or stainless steel IGTMs can be manufactured either with ANSI flanges or with DIN flanges in the ranges: ANSI 150RF - ANSI 600RF PN 10 - PN 100

Initial Verification and Calibration Manufacturing is in compliance with the relevant European requirements. Gas flow meters for custody transfer purposes usually should have an initial verification (legal calibration). This initial verification can be performed at the test installation at our factory, approved by German Weights and Measures (GN 5). This will result in a Verification Certificate, recognised by most Metrological Institutes.

Ductile Iron (EN-GJS-400-18-LT; GGG 40) meter bodies are available in diameters from 50 mm (2") to 200 mm (8") and pressure class PN10 - PN16 and ANSI 125RF - ANSI 150RF.

Accuracy Standard accuracy limits for CT-models are in accordance with the EC directives and many foreign regulations: ± 1% for 0.2 Qmax to Qmax ± 2% for Qmin to 0.2 Qmax

Non-custody transfer meters can also be calibrated at our test installation. A Certificate of Conformity will be provided. In both cases (initial verification or factory calibration) a certificate with the measured values can be issued.

As an option for the CT model the accuracy limits can be improved to: ± 0.5% for 0.2 Qmax to Qmax ± 1% for Qmin to 0.2 Qmax

On request we can also take care of a high-pressure calibration, performed at a certified installation.

These limits are valid for the meter performance in ambient air. Usually, the performance is better at high-pressure applications.

Rangeability

On request we can offer meters according to your accuracy specification.

The rangeability of gas turbine meters is laid down in the EC guidelines. The standard range of an IGTM DN 80 (3“) or larger is 1:20 (Qmin:Qmax). This range is the standard performance in ambient air conditions.

The repeatability of the vemm tec IGTM is better than 0.1% With small sizes (≤ DN80 or 3”), special designs or with low relative density gases (<0.6) the range may be restricted.

Typical performance curves at different pressures are shown in picture 1.

Meters with improved ranges of max. 1:50 are available. Please enquire.

Performance curve [%]

At a higher pressure, the density of the gas increases and with an increasing density the available driving force at the turbine wheel increases. The larger force relatively decreases the influence of the bearing resistance and so decreases the minimum required flow Qmin. Because of this, the actual linear operating range increases. Using the following formula a new Qmin, m can be calculated. The new range of the meter is between the new Qmin, m and the unchanged Qmax.

Q/Qmax [%] – Ambient Pressure – Pressure > 4 bar

Picture 1

3

Pressure Loss

Picture 2 shows this relationship.

The pressure loss at actual flow and pressure can be calculated using the values from the table and the following formula. The pressure loss in ambient air is an important design parameter of the IGTM. The pressure loss is minimized as a result of the design of the internal flow conditioner and the shape of the channels upstream and downstream of the turbine wheel.

= Min. flow rate at actual pressure [m3/h] = Min. flow rate as specified (table 3) [m3/h] = Density of air at standard conditions [1.293 kg/m3] = Gas density at standard conditions (table 1) [kg/m3] = Atmospheric pressure [1.013 bar] = Actual pressure at operating conditions [bar abs]

Operating Range (1:X)

= Pressure loss at flowing conditions [mbar] = Pressure loss with ambient air [mbar] = Actual density at operating conditions [kg/m3] = Density of air at standard conditions [1.293 kg/m3] = Actual flow rate [m3/h] = Maximum flow rate of meter (table 3) [m3/h]

Gas Types The IGTM in its standard design can be used for all nonaggressive gases, such as natural gas, methane, propane, butane, city gas and fabricated gas, air, nitrogen, etc. For aggressive gases, like sour gas, biogas and oxygen, special designs are available with Teflon coating, special lubrication or special purging. See table 1, for detailed requirements for different type of gases.

Material of Construction Operating pressure [bar abs]

The materials of construction are listed in the table below.

Picture 2

Part Housing

Example: At 28 bar the operating range improved from 1:20 to 1:80 Straightening Vane Turbine Wheel Metering Insert Bearing Block Bearings Shafts Gears Magnetic Coupling Index Head

Overload The IGTM is designed to deal with over-ranging of at least 20% of Qmax. Any over-ranging must occur slowly and without pulsations.

Temperature Ranges As standard the IGTM is designed to operate at temperatures between -10°C to 60°C. Special low and high temperature designs are available on request.

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Material Ductile Iron (EN-GJS-400-18-LT) Carbon Steel (Cast or Welded) Stainless Steel (on request) Aluminium Aluminium Aluminium Aluminium Stainless Steel Stainless Steel Stainless Steel or Synthetic Material Stainless Steel Aluminium

Index Head The standard index head can be equipped with the following options: · Tropical version with ventilation · IP 67 with silica gel · High gas temperature version · Special coating for aggressive environments.

In the index head also one high frequency sensor (HF3) is provided as standard. This proximity sensor provides a middle-high frequency signal generated by a rotating impulse-disk. The signal is intrinsically safe in accordance with the NAMUR (EN 50227) standard for intrinsically safe signals. A second (similar) sensor (HF4) can be installed in the index head as an option.

The index head can be turned through 350° without violating the lead seal. An 8-digit non-resettable display shows the totalized volume. During the initial verification and calibration test the ratio of the adjustment gears is checked and (if necessary) adjusted.

By installing optional HF sensors in the meter body, it is possible to sense each ing blade of the turbine wheel (HF1) and/or of the reference wheel (HF2). The detection is based on special proximity switches. The signal is intrinsically safe in accordance with NAMUR (EN 50227). The interface barriers between hazardous area and safe area must be suitable for the application and are available on request.

Dependent on meter size one revolution of the last right hand wheel of the rolls of the index head can represent 0.1, 1 or 10 m3. As standard, the index head is equipped with one low frequency Reed ( closure) switch (1R1) that gives one pulse at one revolution of the last wheel of the counter.

The vemm tec IGTM can be equipped with HF1/HF2 sensors only, without an index head. This option requires an electronic counter, a flow converter or a flow computer, to indicate actual and converted volume. For custody transfer purposes however, the index head is often a mandatory requirement.

As an option a Reed switch (1R10) can be provided that gives 10 pulses per one revolution of the last wheel of the counter. Every Reed switch is connected in series with a 100.0 Ohm resistance. A maximum of two Reed switches can be provided per meter. Code 1R1, 2R1 1R10, 2R10 HF3, HF4

Description Reed switch Reed switch, freq. x 10 HF NAMUR sensor (in the index head) HF NAMUR sensor (at the turbine wheel) HF NAMUR sensor (at the reference wheel)

HF1 HF2

The following options can be offered for pulse outputs.

Max. frequency * < 1 Hz < 10 Hz < 200 Hz

Remarks 1R1 standard, 2R1 optional ** 1R10 and/or 2R10 optional ** HF3 standard, HF4 Optional

< 4.5 kHz

Optional

< 4.5 kHz (equal to HF1)

Optional (only for IGTM-CT sizes 100mm (4") and up)

*) Maximum pulse frequency depends on meter size: please refer to table 3 **) A maximum of 2 reed switches can be supplied per meter

8 digit mechanical index HF sensor turbine wheel bearing block

straightening vane housing

pressure tapping lubrication system

5

metering cartridge

IGTM Gas Turbine Meter

D

A

B1

E1

B2

C1 C2 C3

G

E2

C4

A Pressure containing meter housing with end-flanges B Flow deflector (straightening vane) B1 Central cone B2 Guiding vanes C Metering insert cartridge with turbine wheel C1 Turbine wheel C2 Precision Bearings C3 Bearing block C4 Internal gears, shafts and axis D Magnetic coupling (gas tight sealed) E Index head with nameplates E1 Mechanical counter E2 Connector for Pulse transmitters [1R1; HF3 + options] F Oil Pump G High Frequency pulse transmitters [HF1; HF2]

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F

Lubrication System

Installation

Each IGTM is standard equipped with a lubrication system. The oil pump is dimensioned according to the size of the meter.

Normally the meters are installed with some straight upstream pipe lenght. However, the IGTM is equipped with an internal flow conditioner that takes care that the meter meets the requirements of EN 12261 and OIML. This allows the meter to be installed with minimum 2D upstream piping. For optimal performance, however, vemm tec recommends that the upstream section is 5D or more.

To achieve the long life of the IGTM, regular lubrication is required. Typically, for clean gas applications, a 3-month interval between two lubrication services is recommended. Dirty gas requires a more frequent lubrication.

Fittings like valves, filters, control valves, reducers, T-pieces, bends, safety shut off valves in the upstream section should be preferably 5D or more from the meter inlet. In these cases the application of an upstream flow conditioner might be considered. This could be a tube bundle straigtener, straightening vanes, or other designs.

As an option the IGTM can be provided with lifetime lubricated bearings.

Surface Treatment and Painting Before applying a corrosion-protective layer, each ductile iron IGTM meter body is shot blasted SA 2.5. Carbon steel bodies are mechanically treated. The standard color of the meter body is white (RAL 9001). Stainless steel bodies are supplied without coating. The color of the index head is black.

The down stream section of the meter should preferably be 3D or longer. The temperature probe should be installed in this section. Optionally a temperature probe can be installed in the meter body. The meter is equipped for horizontal installation as standard. Meters ≤150mm (6") diameter can also be operated vertically. If required, please indicate vertical use on your order.

Alternative surface treatments like other colors, special coatings or zinc treatments are possible on request. These special treatments can improve the protection against corrosion.

The gas flow must be free from liquids, dust and particles. These can damage the delicate bearings and the rotor. Also when dust collects over time it has an adverse effect on the metering accuracy. Non-clean gases should be filtered with a 5-micron particle filter.

Material and Safety Tests All IGTMs are statically tested in accordance with the appropriate standards and customer requirements · Hydro test at 1.5 x maximum operating pressure · Air seal test at 1.1 x maximum operating pressure · Material certificate per EN 10204 3.1.B · CE-PED compliance: Directive 97/23/EN

Pulsating gas flow and vibrations should be avoided. The meter axis should be identical to the upstream piping axis. Gaskets immediately upstream of the meter should not protrude. The meters are preferably installed inside. When installed outside, the meter must be protected from direct sunlight and rain for the best performance.

A certification package can be ordered as an option. Other tests like MID, TÜV certification, NDT and US testing and others are available on request.

Documentation The IGTM gas turbine meter comes with an installation, operation and maintenance manual. An installation card is attached to each meter. We recommend that this card stays with the meter. Calibration certificates and material certificates can be provided as an option. Depending on the order and the meter chosen, the optionally ordered certification package contains: · 3.1 certificate with declaration of conformity · Material certificates for pressure containing parts · Welding test certificates (when applicable) · Pressure test certificate · Calibration certificates (as ordered) · EEx certificates of the HF pulse transmitters

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Additional Instrumentation

Systems

The indicated volume will often be converted to volume at base conditions. Parameters for these conversions might be:

Vemm tec has many years of experience with metering skids such as provers or pressure reduction stations. At your request we will be happy to offer meter runs and integrated systems.

• Pressure A pressure tapping enables the measurement of the static pressure near the turbine wheel. The pressure measurement point Pr (pressure at metering conditions), designated Pm in the latest standards, is located on the meter housing and is marked. The bore is 3 mm and perpendicular to the wall. Connection with 6 mm stainless (standard) tubing or larger is recommended.

Ordering Information In order to quickly process your enquiry, we need the following information for adequate pricing and sizing: · Nominal pipe size in mm or inches for installing the meter

• Temperature The temperature measurement should preferably be located within 3 D downstream of the meter. No pressure reducing parts should be located between the temperature device and the meter. The temperature should be measured within the center third of the pipe. As an option, your IGTM can be equipped with an integrated thermo-well.

· Model: High accurate custody transfer type (CT) or industrial model (IM)

• Actual density

· Pressure: Maximum, minimum and normal operating pressure

· Body material: Ductile iron, carbon steel or stainless steel · Flow rate: Maximum, minimum (actual or standard cubic meter per hour, please specify); or G-size.

When an actual density meter is used, the requirements for the pressure and temperature should be followed for the location of the density meter. The Pr point is the source of the gas sample for a density meter that should be located 3-5 diameters downstream of the gas turbine meter.

· Temperature: Maximum, minimum and normal operating temperature · Gas type, composition or analysis (if available)

No devices that can influence the pressure or the temperature of the gas should be installed between a gas meter and the applicable temperature sensor and/or density meter.

· Relative density or base density (standard conditions) · Flange connection, pressure rating and face type · Output signals required (LF reed switch, HF at index head or HF at turbine wheel, dual pulse output)

Flow Converters and Additional Equipment

· Installation conditions (Indoor-Outdoor, ambient conditions)

Vemm tec can provide you with flow converting devices, ranging from a converter with only basic features, to a sophisticated computer with features such as curve correction, valve control, gas chromatograph read-out and other customer specified functions.

· Flow direction horizontal (left-right; right-left) or vertical (up-down; down-up) · Optional services and additional equipment required (calibrations, barriers, flow correctors, filters, meter tubes)

We can also provide you with the additional equipment such as IS-barriers, F/I-converters, transmitters, filters, straightening vanes and meter tubes.

Alternatively you can ask for our IGTM questionnaire.

We will be happy to send you any further information.

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Table 1 Gas types

Gas type

Acetylene Air Ammonia Argon Biogas Butane Carbon dioxide Carbon monoxide City gas Ethane Ethylene (gas phase) Flue gases Freon (gas phase) Helium Hydrogen Hydrogen sulphur (0.2%) Methane Natural Gas Nitrogen Oxygen (pure) Pentane Propane Propylene (gas phase) Sour gas Sulphur dioxide (0.2%)

Symbol

NH3 Ar

Density @1.013 bar [kg/m3] 1.17 1.29 0.77 1.78

C4H10 CO2 CO

2.70 1.98 1.25

C2H6 C2H4

1.36 1.26

CCl2F2 He H2 H2S CH4 N2 O2 C5H12 C3H8 C3H6

5.66 0.18 0.09 1.54 0.72 0.8 1.25 1.43 3.46 2.02 1.92

SO2

2.93

C2H2

Meter housing

Notes

Special Standard Standard Standard Special Standard Standard Standard Standard Standard Standard Special Standard Standard Special Special Standard Standard Standard Standard Standard Standard Standard Special Special

Aluminium parts Teflon coated

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O-Rings / Lubrication Special Internal Except foodstuff industry

Special Internal O-Rings / Lubrication O-Rings / Lubrication Special flow range Special flow range Special Internal

Special Internal

Special Internal O-Rings / Lubrication Special Internal

D

H

Table 2.1 Dimensions and weights

A B L

DN [mm] [Inch] DN 50 (2")

Size G

DN 80 (3")

DN 100 (4")

E

A [mm] CT IM 62 62

B [mm] CT IM 70 70

E D Height Total length [mm] [mm] H [mm] L [mm] CT IM CT IM CT IM 102 102 165 215 215 150 150 127 127 165 200 200 127 127 165 200 200 127 127 180 205 205 140 140 195 215 215 102 102 152 215 215 127 127 152 200 200 127 127 165 200 200 127 127 165 200 200 127 127 165 200 200

100 or 160 or 250

92

42

108

56

120

115 145 145 150 155 150 145 150 150 150

200 200 200 215 230 191 191 210 210 210

205 192 192 192 192 205 192 192 192 192

230 220 220 225 230 230 215 220 220 220

240

120

PN 10/16 Ductile Iron PN 10/16 Steel PN 25/40 Steel PN 64 Steel PN 100 Steel ANSI 150 Ductile Iron ANSI 150 Steel ANSI 300 Steel ANSI 400 Steel ANSI 600 Steel

17 26 26 32 35 25 24 28 29 29

15 28 32 37 37 15 25 30 30 30

160 or 250 or 400

120

50

154

75

135 140 140 140 140 135 140 140 140 140

135 160 165 170 180 135 165 170 170 180

220 220 235 250 265 229 229 254 254 273

230 215 215 215 215 230 215 215 215 215

245 230 235 240 250 235 235 240 240 255

300

150

PN 10/16 Ductile Iron PN 10/16 Steel PN 25/40 Steel PN 64 Steel PN 100 Steel ANSI 150 Ductile Iron ANSI 150 Steel ANSI 300 Steel ANSI 400 Steel ANSI 600 Steel

27 24 39 42 48 25 36 43 43 50

24 42 48 55 62 24 48 57 57 60

40 or 65

10

Pressure Body Weight class material [kg] PN or ANSI CT IM PN 10/16 Ductile Iron 11 11 PN 10/16 Steel 24 24 PN 25/40 Steel 24 24 PN 64 Steel 24 24 PN 100 Steel 33 33 ANSI 150 Ductile Iron 11 11 ANSI 150 Steel 24 24 ANSI 300 Steel 20 24 ANSI 400 Steel 24 24 ANSI 600 Steel 24 24

Table 2.2 Dimensions and weights DN Size A [mm] G [mm] [Inch] CT IM DN 400 182 56 150 or (6") 650 or 1000

B [mm] CT IM 218 85

E D Height Total length [mm] [mm] H [mm] L [mm] CT IM CT IM CT IM 198 235 285 255 275 450 175 215 230 285 250 260 215 240 300 250 270 215 250 345 250 290 215 250 355 250 290 198 235 279 255 275 215 225 279 250 260 215 240 318 250 275 215 240 318 250 275 215 255 356 250 290

DN 650 240 200 or (8") 1000 or 1600

69

278

160

250

255 255 255 255 265 275 285 290 255 255 275 275 285

340 340 340 340 360 375 415 430 343 343 381 381 419

270

290 290 290 290 298 308 320 330 290 290 308 308 320

600

200

PN 10 Ductile Iron 76 PN 10 Steel 78 PN 16 Ductile Iron 76 PN 16 Steel 78 PN 25 Steel 90 PN 40 Steel 100 PN 64 Steel 125 PN 100 Steel 160 ANSI 150 Ductile Iron 80 ANSI 150 Steel 83 ANSI 300 Steel 106 ANSI 400 Steel 135 ANSI 600 Steel 155

92 92 92 92 108 122 163 176 96 96 128 128 190

DN 1000 300 250 or (10") 1600 or 2500

125

353

168

270

270

395 405 425 450 470 505 406 445 445 508

285

285

750

300

PN 10 PN 16 PN 25 PN 40 PN 64 PN 100 ANSI 150 ANSI 300 ANSI 400 ANSI 600

Steel Steel Steel Steel Steel Steel Steel Steel Steel Steel

110 110 110 130 155 220 110 150 170 240

70 72 90 108 140 205 72 110 122 210

DN 1600 360 300 or (12") 2500 or 4000

130

358

130

315

315

445 460 485 515 530 585 483 521 521 559

320

320

900

320

PN 10 PN 16 PN 25 PN 40 PN 64 PN100 ANSI 150 ANSI 300 ANSI 400 ANSI 600

Steel Steel Steel Steel Steel Steel Steel Steel Steel Steel

120 130 150 180 240 345 160 210 240 290

96 100 124 160 180 280 160 212 235 300

DN 2500 480 400 or (16") 4000 or 6500

150

480

150

350

350

565 580 620 660 670 715 597 648 648 686

355

355

1200 400

PN 10 PN 16 PN 25 PN 40 PN 64 PN100 ANSI 150 ANSI 300 ANSI 400 ANSI 600

Steel Steel Steel Steel Steel Steel Steel Steel Steel Steel

355 380 415 455 500 600 432 450 500 590

225 250 285 325 370 470 280 320 370 460

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Pressure Body Weight class material [kg] PN or ANSI CT IM PN 10/16 Ductile Iron 45 30 PN 10/16 Steel 45 62 PN 25/40 Steel 40 70 PN 64 Steel 74 102 PN 100 Steel 90 110 ANSI 150 Ductile Iron 50 30 ANSI 150 Steel 63 60 ANSI 300 Steel 70 84 ANSI 400 Steel 80 84 ANSI 600 Steel 100 110

Tel. +49 (0) 3 31 / 70 96 274

Fax +49 (0) 3 31 / 70 96 270

E mail: [email protected]

[m3/h] 65 100 160 250 400 250 400 650 650 1000 1600 1000 1600 2500 1600 2500 4000 2500 4000 6500 4000 6500 10000

Qmin Rotating (standard speed flow range) turbine wheel @ Qmax [m3/h] [min-1] 13 8900 10 13700 16 6200 13 9600 20 8900 13 4300 20 6900 32 6500 32 3400 50 5200 80 4800 50 2200 80 3500 130 3100 80 2000 130 3100 200 2900 130 1900 200 3000 320 2800 200 1600 320 2600 500 2300

Changes in course of technical development are reserved. 2009

DN 400 (16”)

DN 300 (12”)

DN 250 (10”)

DN 200 (8”)

DN 150 (6”)

DN 100 (4”)

vemm tec Messtechnik GmbH

200–002–005

Internet: http://www.vemmtec.com

G G 40 G 65 G 100 G 160 G 250 G 160 G 250 G 400 G 400 G 650 G 1000 G 650 G 1000 G 1600 G 1000 G 1600 G 2500 G 1600 G 2500 G 4000 G 2500 G 4000 G 6500



[mm] [inch] DN 50 (2”) DN 80 (3”)

14482 Potsdam-Babelsberg

Size rating

Gartenstrasse 20

Nominal diameter

Qmax

Gas - Measurement

blade angle 45 45 45 45 30 45 45 30 45 45 30 45 45 30 45 45 30 45 45 30 45 45 30

number of blades 16 16 16 16 16 16 16 16 20 20 20 20 20 20 24 24 24 24 24 24 24 24 24

Turbine wheel

Max. frequency HF1/HF2 approx. [Hz] 2800 4300 1900 2900 2600 1200 1900 1700 1100 1700 1600 790 1300 1100 830 1300 1200 780 1300 1200 610 990 1300

Max. frequency HF3/HF4 approx. [Hz] 80 120 50 80 70 60 90 80 70 100 60 40 70 60 60 90 90 60 90 130 60 100 130

Max. frequency 1R1 Reed [Hz] 0,18 0,28 0,04 0,07 0,11 0,07 0,11 0,18 0,18 0,28 0,04 0,03 0,04 0,07 0,04 0,07 0,11 0,07 0,11 0,18 0,11 0,18 0,28 HF1/HF2 approx. [Imp/m3] 155000 155000 42200 42200 23500 17000 17000 9400 6280 6280 3570 2840 2840 1510 1870 1870 1110 1120 1120 660 550 550 470

k-factor HF3/HF4 approx. [Imp/m3] 4400 4400 1200 1200 670 800 800 440 360 360 135 150 150 80 135 135 80 80 80 75 55 55 50

k-factor

1R1 Reed [Imp/m3] 10 10 1 1 1 1 1 1 1 1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1

k-factor

Table 3 IGTM gas turbine meter: technical specifications

The indicated frequency values and k-factors of HF1/HF2 and HF3/HF4 are for information only. The final values will be mentioned at the meter´s nameplate and in the calibration certificate.