TURBINE GAS METERQ-75

TURB

INE

GA

S M

ETER

Q-7

5

M-Q

75-1

1

E

NATIONALACCREDITATION

OF CERTIFICATIONBODIES

GENERAL

The INSTROMET Q - 75 turbine gasmeter is an integrating flow meterfor the measurement of gases. Thevolume of gas passing through themeter, at the operating pressure andtemperature, is indicated on a count-er in units of volume (m3). The vol-ume registered can be converted toa reference volume (Nm3) by appli-cation of a volume integrator suchas the Instromet electronic flow com-puters and volume correctors. Ifrequired, the line volume can beconverted to mass by the use of adensity transmitter and an Instrometflow computer.

APPLICATIONS

The standard Q - 75 meter is suit-able for all non-corrosive gases suchas natural gas, propane, butane, air,nitrogen, ethylene, hydrogen, etc.A special construction can be suppliedfor use with corrosive gases. Thepressure containing structure of theQ - 75 meter is constructed in accord-ance with many pressure vesselcodes and standard construction isin accordance with the Dutch Stoom-wezen code.

The Q - 75 turbine meter is used inmany different industrial applica-tions to measure process gas or feed-stock gas. Additionally they are usedin operations with multiple usagepoints for cost allocation purposes.

2

GENERAL TECHNICAL DATA

Pressure ratings : PN 10 to PN 100 and ANSI 125 to ANSI 600. Higherpressure ratings on request

Nominal diameters : 50 mm (2”) to 600 mm (24”). Larger sizes on request

Flow rates : Up to 25,000 m3/h (line conditions)

Measurement range : 20:1 at atmospheric conditions*

Installation : Upto 200 mm (8”) both vertical and horizontal; over200 mm horizontal only

Repeatability : ± 0,1%

Measuring accuracy : Between Qmin and 0.2 Qmax ± 2% **Between 0.2 Qmax and Qmax ± 1%**

Temperature range : - 10° C to + 50° C. Other temperature rangeson request

* Some smaller size meters have reduced ranges** For uniform swirl free flow

MATERIALS SPECIFICATION

Body : Ductile iron or fabricated from steelSee chart on page 7

Rotor : Meters 150 mm PN 10/16 ANSI 125 and smaller sizes: standard delrin. Optional aluminium.All other sizes: standard aluminium

Bearings : Stainless steel

Shafts : Stainless steel

Magnet coupling : Ferroxdure magnets in stainless steel bushings

Meter module : Aluminium

Screws and bolts : Stainless steel

O-rings : Viton

Gears : In contact with gas: delrin and stainless steelIn the index: delrin

Oil pumps : Chrome-plated brass or steel

Index head : Aluminium

NOTE: Special materials available on request. The internals can be tefloncoated for service with corrosive mediums.

Meter with injection oil system Meter with push button oil system Meter with small oilpump

Ethylene gas meter (special)

3

CONSTRUCTION

The main parts of the Q - 75 turbine gas meter are:

1. Meter body

2. Measuring mechanism and turbine wheel

3. Inlet flow conditioner

4. Mechanical drive and magnetic coupling to transmit turbine wheelrotation outside the pressure vessel

5. Mechanical counter for registering the volume measured

6. Oil lubrication system for the turbine wheel shaft bearings

5

4

2

3

1

6

OPERATING PRINCIPLE

The flowing gas enters the meterthrough a built-in flow conditioner(1) that conditions the flow profileand increases the gas velocity. Thegas continues along the flow chan-nel (2) and enters the turbinerotor.The turbine rotor blading (3)is designed with overlap to give com-plete guidance to the flowing gasand extract the maximum energy atlow gas velocities. The turbinewheel’s angular velocity is propor-tional to the average gas velocityflowing through the meter. The gasexits the turbine rotor through aflow ring (4) and an expanding exitchannel to minimize pressure losses.The rotation of the turbine rotor istransmitted via a gear train (5) andtransferred from the pressurisedmeter body to the counter (7) by agas tight magnetic coupling (6). Thefollower magnet of the magneticcoupling drives the counter to regis-ter volumes measured at the oper-ating conditions.

4

MEASURING RANGE

The Q-75 turbine gas meter has a measuring range of 20:1 with air at atmos-pheric conditions. At higher operating densities, the range of the turbine meterwill increase since more torque is available to overcome mechanical friction ofbearings. The following equation may be used to estimate the minimum flowrate of the meter for various operating conditions:

Q = minimum capacity under operating conditions

Qm = minimum capacity for meter accuracy - see table on page 7

pm = operating pressure of the meter in bar absolute

p(atm) = atmospheric pressure in bara ( 1.01325 bara)

d = relative density of the flowing gassee table page 10.

√ p(atm)pm

x1dQ = Qm

4

The formula is only valid at near ambient temperature and assumes idealgas behaviour (Z=1)

Instromet Q 75 turbine gas meter withmodel 510 electronic volume corrector

All Q-75 turbine gas meters are cali-brated with atmospheric air.Instromet can test meters at 8 barpressure at their high pressure testfacility at Utrecht, the Netherlandsand provide certification of accuracyby the NMI (Dutch Bureau of LegalMetrology). This facility has a maxi-

mum capacity of 10,000 m3/h. how-ever this capacity can only be obtai-ned during the colder period of theyear since the gas used is returned toa distribution system. Additional testcapabilities are available and refer-ence should be made to your nearestsales office for further information.

5

INSTROMETHIGHPRESSURECALIBRATIONFACILITY

CALIBRATION

TYPICAL CALIBRATION CURVE

Flow rate in % of QmaxAtmospheric airHigh pressure

Q-75 turbine gas meter testing facility.

6

PRESSURE LOSS

The average pressure loss of the Q -75 turbine meter using atmosphericair and measured at one (1) diame-ter upstream to one (1) diameterdownstream of the meter onstraight pipe of the same size as themeter.

The pressure loss across the Q - 75for various gases and other opera-ting pressures may be approximat-ed from the following equation.

PRESSURE LOSS FORMULA

▲▲ P2 = ▲▲ P1 x d x x 2

▲▲ P2 = Pressure drop at Pmand Q- mbar

▲▲ P1 = Pressure drop atQmax - see table

Pm = Operating pressureabsolute

Pm

p(atm)( )Q

Qmax( )P(atm) = Atmospheric Pressure

(table conditions1.013 bara)

Q = Instantaneous flowrate

Qmax = Max. flow rate fromthe table above

d = Relative density of thegas (air = 1)

DIMENSIONSSize

DIMENSIONS IN mm

mm A B C D E H

50(2”) 60 — 150 195 — 235

80(3”) 30 — 120 230 — 250

100(4”) 49 75 150 275 255 268

150(6”) 62 87 175 356 298 313

200(8”) 69 100 200 430 338 353

250(10”) 140 167 375 508 327 315

300(12”) 172 224 450 585 352 338

400(16”) 221 280 600 686 394 380

500(20”) 335 365 750 813 445 431

600(24”) 350 380 900 940 495 482

▲▲PSize Q max Qmaxmm (m3/h) (mbar)

50 (2”) 65 350 (2”) 100 680 (3”) 160 380 (3”) 250 780 (3”) 400 17100 (4”) 250 2100 (4”) 400 5100 (4”) 650 13150 (6”) 650 3,5150 (6”) 1000 7150 (6”) 1600 16200 (8”) 1000 1,5200 (8”) 1600 2,5200 (8”) 2500 5,5

▲▲PSize Q max Qmaxmm (m3/h) (mbar)

250 (10”) 1600 1,5250 (10”) 2500 3,5250 (10”) 4000 8,5300 (12”) 2500 1,5300 (12”) 4000 4,0300 (12”) 6500 9,0400 (16”) 4000 1,5400 (16”) 6500 4,0400 (16”) 10000 9,0500 (20”) 6500 1,5500 (20”) 10000 4,0500 (20”) 16000 9,0600 (24”) 10000 1,5600 (24”) 16000 4,0600 (24”) 25000 9,0

The formula is only valid at near ambient temperature and assumes ideal gas behaviour (Z=1)

oil pump

7

MEASUREMENT RANGES Q 75

* = Maximum density 53 kg/m3 at Qmaxtr** = m3/revolution of output shaft

GGG = Ductile iron GGG 40St = Steel

Sizes Qmax Qmin tr** Length Pressure Body Weight Pressure Body Weightmm m3/h m3/h m3 mm Rating material kg Rating material Kg

PN 10/16 GGG 10 PN 100 26ANSI 125 10

50 65 13 0,1 150 ANSI 150 St 182” 100 10 PN 10/16 20 ANSI 300 20

PN 25/40 St 20 ANSI 400 20PN 64 23 ANSI 600 20

PN 10/16 GGG 12 PN 100 38160 16 ANSI 125 12

80 250 13 1 120 ANSI 150 303” * 400 20 1 PN 10/16 32 ANSI 300 St 34

PN 25/40 St 32 ANSI 400 34PN 64 35 ANSI 600 34

PN 10/16 GGG 19 PN 100 51250 13 ANSI 125 19

100 400 20 1 150 ANSI 150 404” *650 32 1 PN 10/16 35 ANSI 300 St 49

PN 25/40 St 40 ANSI 400 49PN 64 45 ANSI 600 58

PN 10/16 GGG 28 PN 100 99650 32 ANSI 125 28

150 1000 50 1 175 ANSI 150 566” *1600 80 1 PN 10/16 59 ANSI 300 St 78

PN 25/40 St 68 ANSI 400 78PN 64 94 ANSI 600 100

PN 10 42 PN 40 112PN 16 GGG 42 PN 64 143

200 1000 50 10 ANSI 125 42 PN 100 1608” 1600 80 10 200 ANSI 150 St 90

*2500 130 PN 10 83 ANSI 300 120PN 16 St 88 ANSI 400 120PN 25 100 ANSI 600 152

PN 10 69 ANSI 150 741600 80 PN 16 71

250 2500 130 10 375 PN 25 St 89 ANSI 300 St 11010” *4000 200 10 PN 40 109 ANSI 400 141

PN 64 139 ANSI 600 200PN 100 199

PN 10 92 ANSI 150 1302500 130 PN 16 102

300 4000 200 10 450 PN 25 St 120 ANSI 300 St 18212” *6500 320 10 PN 40 157 ANSI 400 214

PN 64 195 ANSI 600 264PN 100 302

PN 10 200 ANSI 150 250400 4000 200 10 PN 16 230 ANSI 300 31016” 6500 320 10 600 PN 25 St 260 St

*10000 500 PN 40 310 ANSI 400 340PN 64 360 ANSI 600 430

PN 10 312 ANSI 150 412500 6500 320 10 750 PN 16 St 362 ANSI 300 St 56220” 10000 500 10 PN 25 402 ANSI 400 592

*16000 800 PN 40 452 ANSI 600 742

PN 10 507 ANSI 150 657600 10000 500 100 900 St 557 ANSI 300 St 90724” 16000 800 100 PN 16 ANSI 400 957

*25000 1300 PN 25 607 ANSI 600 1107

8

METER INDEXES

The turbine meter is fitted with an index counter which can give both a mechanical and various electronic read-outs. The standard Multi-index has an eight digit mechanical read-out fitted in a white coloured index head. It may berotated through 350° for ease of viewing.

Multi-Index Slot Sensor

Mechanical Options:

- An external shaft can be fitted to drive a mechanical volume corrector- The head can be made air and water tight and can be fitted with a Silicon element to absorb

interior water vapour

Electronic Options:

- The Multi Index head can be fitted with a maximum of three frequency sensors (i.e.) 2x LF & 1x HF, or 2x HF & 1x LF.

- The HF output uses a slot sensor on a disk with 29 segments- The LF output uses a reed switch with 1,2,5, or 10 impulses per revolution.

The reed switch circuit may either be normally open or closed. - One or two connectors of the Binder type may be fitted.

Connections may also be made through aHarting type or through a special Instromet ISM connector boxfitted to the side of the head of the index.

- The connections and the impulse values are stated on the information plate located on the index cover.

- The pulse data is included in the table below.

Proximity Switch/Reprox Probe

This high frequency pick-up may be mounted at the turbine rotor (aluminium rotor only) and/or at a follower disk mounted onthe main shaft. Its pulse data is also given in the table below.

Proximity Switch/Reprox Probe

9

LUBRICATION

The frequency of lubricating a meterdepends on the operating condi-tions. A meter operating in dirty gasneeds to be lubricated more oftenthan a meter operating in clean gas.

Under normal conditions metersshould be lubricated 2 to 3 times ayear.

Recommended quantity of oil:For the 2" and 3" meters 1 cc

4" ,, 2 cc6" ,, 3 cc8" ,, 4 cc

10" ,, 5 cc12" ,, 6 cc16" ,, 8 cc20" ,, 10 cc24" ,, 12 cc

.

Lubricating oil: ISOFLEX PDP 38,Kluber Lubrication.For special applications contactInstromet for advice.

PUSH BUTTON PUMP

Standard on 50 and 80 mm metersin pressure ranges above 16 Bar. 0.1cc per stoke.For 16 bar and less, standard is anoil injection system (Syringes),optional push button oil pump.

SMALL OIL PUMP

Standard on 100 mm, 150 mm and200 mm meters in all pressureranges. 0,5 cc per stroke.

LARGE OIL PUMP

Standard on 250 mm meters andlarger in all pressure ranges. 1 cc perstroke.

* tr=m3 per revolution of the index first wheel** Follower disc not available+ For pressures of 10 bar and over: 1000 Hz at Qmax.

The above pulse data are approximate values

PULSE DATA

Size Qmax tr* HF Blades HF Low frequency Pulses per m3

in mm m3/h m3 Index Turbine ProximityHz Rotor Switch 1 pulse 2 pulses 5 pulses 10 pulses

at Qmax Hz per per per perat Qmax rev. rev. rev. rev.

50 65 0,1 140 12 1700** 10 20 50 1002” 100 0,1 210 12 2600** 10 20 50 100

80 160 1 110 12 1300** 1 2 5 103” 250 1 160 12 2000** 1 2 5 10

400 1 150 12 1800** 1 2 5 10

100 250 1 100 16 1100 ** 1 2 5 104” 400 1 160 16 1800 ** 1 2 5 10

650 1 140 16 1600 ** 1 2 5 10

150 650 1 150 20 1200 ** 1 2 5 106” 1000 1 230 20 1800 **+ 1 2 5 10

1600 1 210 20 1700 ** 1 2 5 10

200 1000 10 50 20 1770 0,1 0,2 0,5 18” 1600 10 90 20 1200 0,1 0,2 0,5 1

2500 10 80 20 1100 0,1 0,2 0,5 1

250 1600 10 90 24 1825 0,1 0,2 0,5 110” 2500 10 140 24 1300 0,1 0,2 0,5 1

4000 10 130 24 1200 0,1 0,2 0,5 1

300 2500 10 50 24 1810 0,1 0,2 0,5 112” 4000 10 80 24 1300 0,1 0,2 0,5 1

6500 10 70 24 1200 0,1 0,2 0,5 1

400 4000 10 160 24 1660 0,1 0,2 0,5 116” 6500 10 260 24 1100 0,1 0,2 0,5 1

10000 10 220 24 1900 0,1 0,2 0,5 1

500 6500 10 130 24 1530 0,1 0,2 0,5 120” 10000 10 210 24 1900 0,1 0,2 0,5 1

16000 10 190 24 1800 0,1 0,2 0,5 1

60 10000 100 50 24 1470 0,01 0,02 0,05 0,124” 16000 100 80 24 1700 0,01 0,02 0,05 0,1

25000 100 70 24 1600 0,01 0,02 0,05 0,1

10

ELECTRONIC VOLUME CORRECTORS

The Q-75 turbine meter totalizes volumes at operating conditions of pressure and temperature. Instromet Volume Cor-rectors can be used to convert the volume under line conditions to reference conditions (such as 1.0325 bar, 0°C or 14.73psi, 60 F). Reliability and security are ensured by rigorous design procedures, thorough testing and extensive field ex-perience. Proven insensitivity to very high levels of electrical interference and excellent accuracy and stability have resul-ted in approval even by the most critical metrological authorities in Europe.

MODEL 500 MICROSTAR VOLUME CORRECTORThe 500 series is a range of compact economic electronic volume correctors forfiscal gas metering to small industrial and commercial users. Also suitable foraccurate in plant gas metering. Models for temperature correction only, pres-sure correction only and for both pressure and temperature correction are avail-able. (See brochure 500).

MODEL 510 VOLUME CORRECTOR

An intrinsically safe, compact, low power, battery operated volume corrector.Meter output is converted to volume at the user’s reference conditions takingpressure, temperature and compressibility into account. Maximum pressure 10bar (150 psi) (see brochure 510).

OTHERGASES

Instromet hasfurnished me-ters for Oxygenservice howeverInstromet doesnot claim thematerials of con-struction to besuitable for thisservice. A mate-rials list will beprovided forinspection andapproval by theuser.

NOTES

Applicable to clean dry gases from-10°C to +50°C. Other temperatureranges on request.

S = Standard materialsT = Corrosion resistent coated

body and internals (exceptplastic and stainless steelparts)

1) = Special O-ring materials2) = Special lubrication3) = Special turbine wheels

NOTE

For wet gases, coating can beapplied to the body inside surface.

For corrosive atmospheres, bodyexternal surface and index case canbe coated.

For higher or lower temperaturesspecial lubrication and materials canbe supplied.

RACK MOUNTED FLOW COMPUTER

Instromet supplies a range of rackmounted flow computers withextensive output and logging facil-ities and temperature or densityinputs. Models for up to three streams areavailable. Ask your nearest sales of-fice for more detailed information.

Gas Formula Relative Body RemarksDensity at Con-0 °C struc-1.01325 tionbar

Acetylene C2H2 0.9084 T Coated*Air ≈N2 + O2 1 SArgon Ar 1.3796 SBiogas — — T 1) 2) 3)Butane C4H10 2.0886 SCarbon dioxide CO2 1.5299 SCarbon monoxide CO 0.9671 SEthane C2H6 1.0481 SEthylene C2H4 0.9754 S 1) (P-meter)Helium He 0.1380 S High QminHydrogen H2 0.0695 S High QminMethane CH4 0.5548 SNitrogen N2 0.9670 SOxygen O2 1.1051 S 1) 2) Spec. AssemblyPentane C5H12 2.6709 SPropane C3H8 1.5550 SPropylene C3H6 1.4799 S 1) (P-meter)

*) Corrosion resistent coating

1.The gas must be clean, i.e. free fromdust, liquids and foreign objectswhich may damage the metermechanism. Where this cannot beguaranteed, it is recommended toinstall a gas filter with a filteringgrade of 5 Micron or smaller.

2.The gas flow must be uniform andfree of pulsations. Devices whichcreate flow disturbances such asregulators, filters, valves, etc., mustbe either installed at sufficient dis-tance of the meter or followed byan effective straightening vane (suchas the FC 20) ahead of the meter.Devices which have full diameterround openings (e.g. ball valves) maybe installed up to 3 D ahead of themeter.

3.For optimum accuracy and leastsensitivity to installation effects, usethe turbine gasmeter SMRI-X4X. A straight pipe length of at least 3 Dmust be installed ahead of the meter.If reducers or expanders are to beused, their angle of reduction/expan-sion should not exceed 30°. A chan-ge in flow direction should not occurat less than 3 D before the meter.

4.Meter flanges must be properly cen-tered. No objects such as gasketsshould protrude into the meterentrance or exit.

5.Standard Q - 75 meters must beinstalled horizontally with the indexon top. If installation in a differentplane is necessary, this should bespecified at the time of ordering.The index head can be rotated over350° in a plane perpendicular to themeter output shaft.

6.Each Q - 75 meter is supplied with atest certificate. The certificate indi-cates test results and the operatingconditions for which the meter issupplied.

7.The Q - 75 meters may be over-loaded up to 20% for short periodsof time. During commissioning themeter must be pressurized slowly toprevent damage to the mechanism.

8.It is recommended to install Q - 75meters indoors. Meters may beinstalled outdoors but should be pro-tected from the weather.

9.Gas temperature measurementwhen used should be downstreamof the meter.

10.For making volume conversions fromoperating conditions to referenceconditions, the meter pressureshould be taken at the pr point onthe meter.

11.Periodic checks:Depending on the operating condi-tions, the meter should be checkedfor accuracy on a periodical sched-ule. It can be tested on site with aportable testing unit. The meter canalso be tested in a testing labora-tory or may be returned to ourworks for inspection and test.

HOW TO ORDER

The following information will helpus determine which meter best suitsyour requirements:

1. Pipe diameter2. Gasflow in Nm3/h (Scfh):

Min. and Max.3. Operating pressure:

Min. and Max.4. Operating temperature:

Min. and Max.5. Ambient temperature:

Min. and Max.6. Type of gas7. Relative density of the gas8. Flange class:

DIN, ANSI9. Type of indexhead

With LF- or HF frequencypulser

10. HF-turbinerotorReprox probe

11. Flow direction:Left ➜ RightRight ➜ LeftTop ➜ bottomBottom ➜ top

12. Accessories:Electronic volume correctorsLubrication systemStraightenerChemical resistant coating(CRC)

13. Required documents

11

INSTALLATION ANDOPERATING INSTRUCTIONS

≥ 2D

Pr Point

Perforated plate straightener FC-20

Pr PointTube bundle straightener SV

Sales Offices:In Argentina:INSTROMET SUDAMERICANA S.A.

In Austria:INSTROMET B.V. GES.M.B.H.

In Belgium:INSTROMET INTERNATIONAL N.V.

In Brazil:INSTROMET MEDIÇÃO E CONTROLE LTDA.

In France:INSTROMET S.A.R.L.

In Germany:INSTROMET G.M.B.H.

In Greece:INSTROMET POLITIS LTD.

In Italy:INSTROMET ITALIA S.R.L.

In Korea:INSTROMET KOREA LTD.

In Malaysia:INSTROMET ASIA PACIFIC SDN. BHD.

In the Netherlands:INSTROMET B.V.INSTROMET ULTRASONICS B.V.

In Portugal:INSTROMET PORTUGAL LDA.

In Spain:INSTROMET ACUSTER S.L.

In the UK:NFC INSTROMET LTD.

In the USA:INSTROMET ULTRASONIC TECHNOLOGIES INC.INSTROMET GAS MEASUREMENT DIVISIONINSTROMET TECHNOLOGY CORP.

Products & Services:● Ultrasonic gas flow meters

● Turbine gas meters

● Rotary gas meters

● Diaphragm gas meters

● Insertion gas meters

● Electronic volume correctors

● Flow computer systems

● Gas filters

● Gas pressure regulators

● Safety shut-off valves

● Calorimeters

● Gas chromatographs

● Pressure transmitters

● Telemetering systems

● Electronic metering and control systems

● Calibration and test installations

● Complete gas measurement and control stations

● Commissioning, servicing, training and consulting

2011

96 C

opyr

ight

© In

stro

met

/ Ro

oduy

n V

orm

& D

ruk

Den

Haa

g

INSTROMET has agents and representatives worldwide.

INSTROMET has a continuing program of product research and development.Technical specifications and construction may change due to improvements.This publication serves as general information only, and all specifications aresubject to confirmation by INSTROMET.

YOUR SALES OFFICE OR REPRESENTATIVE:

Gas measurement and control equipment

For your nearest sales office orrepresentative please contact:INSTROMET INTERNATIONALRijkmakerlaan 9 - B-2910 ESSEN - BELGIUMTel: +32 3 667 3440 - Fax : +32 3 667 6940Email: instromet.intl@tornado.beWeb-page: http://www.zeb.be/instromet/