Metreg MQM Manual
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Metreg MQM Manual

Quantometers
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Manual
MQM
Quantometers
Quantometers
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Metreg Technologies GmbH

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Summary of Contents for Metreg MQM

  • Page 1 Manual Quantometers Quantometers living g as. Metreg Technologies GmbH...
  • Page 2 MQM_Manual_EN_16.01.2015 © 2014 Metreg Technologies GmbH • Design: www.reidelsoltaugrafi kdesign.de All rights reserved. Subject to technical changes. www.metreg-technologies.de...
  • Page 3 Manual Quantometers Quantometers...

  • Page 4: Table Of Contents

    ................... 6 Design of the MQM Quantometer ................. 6 Technical Data ......................7-8 Installation ......................8-9 Mounting Position / Direction of Flow ................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.

  • Page 5: Purpose Of This Manual

    Protective actions have to be defined 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), purified 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.

  • Page 6: Declaration

    3. Declaration Declaration of Conformity (Annex A) 4. Use and Scope of Quantometers The Quantometer MQM is designed for none fiscal 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.

  • Page 7: Technical Data

    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.

  • Page 8: Installation

    1000 1600 5400 *)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 flow is in the same direction as shown by the arrow at the meter housing.

  • Page 9: Mounting Position / Direction Of Flow

    Isolation valve Ventil Isolation valve Figure 3: Typical vertical installation of the MQM turbine gas meter (only DN ≤ 150) Notice: Ensure that the gas flow is in the same direction as shown by the arrow at the meter housing.

  • Page 10: Preliminary Work

    9. Preliminary work Before the installation of the meter please make sure that the following steps has been observed: 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. Clean the flange surfaces (e. g. with petroleum). Check by blowing into the meter that turbine rotor rotates easily and stops smoothly.
  • Page 11 Pressure class Flanges according DIN EN 1092-1 [mm] Hexagon screws and nuts Min. operating Number Strength Strength temperatur of of screws class class the screws screws screws and nuts - 10°C 4 x M12 5.6 / 8.8 5 / 8 - 10°C 4 x M16 5.6 / 8.8 5 / 8 - 10°C 8 x M16 5.6 / 8.8 5 / 8 100 - 10°C...

  • Page 12: Lubrication And Maintenance Of The Mqm Quantometer

    10. Lubrication and Maintenance of the MQM Quantometer Quantometers with permanent lubricated ball bearings (no oil pump) are maintenance-free. Quantometers with an oil pump need periodic lubrication. The initial lubrication procedure is: Use only oil recommended and supplied by Metreg Technologies. One set of oil for commissioning is delivered with the meter. b. Specified oil: Shell Morlina S2 BL 5 or Shell Morlina S2 BL 10 Fill in the oil before commissioning the meter and after the correct installation of the meter described in chapter 7 and 8.

  • Page 13: Maintenance Of Mqm Quantometers

    A repair of the Quantometer has only to be done by competent and authorized personnel like the Service Engineers from Metreg Technologies. 12. Commissioning of the MQM Quantometer The start-up procedure of the MQM Quantometer follows the installation and leakage test of the connections: Open slowly the upstream valve (fig. 2 and fig. 3) to pressurize the pipe until operation pressure is achieved. The rate of pressure increase shall not exceed 350 mbar/s.

  • Page 14: Pulse Generators

    Figure 5: The LF assembly Figure 6: Installed LF assembly with the MQM Quantometer As an option one high frequency (HF) pulse generator can be installed onto the meter. The function of the HF pulser is the determination of the actual gas flow in high resolution. The HF-pulser follows NAMUR specification and is typically connected to the input of flow computers or appropriately equipped volume correctors. For the connection use shielded cable. The blades of the turbine rotor are scanned by the high-frequency sensor. Each blade passing the HF-sensor creates a pulse. Figure 7 shows a MQM Quantometer with fitted HF-sensor. Abb. 7: MQM Quantometer mit HF-Sensor...
  • Page 15 The connection of the LF pulse transmitter unit is different depending on whether the meter head is made of composite or aluminum. Index head out of composite: The LF-pulser unit comes standard with three meter cable. The cable configuration is as follows: •...

  • Page 16: Pressure Measuring Point

    15. Pressure Measuring Point There is a pressure test point within the MQM Quantometer as shown in figure 8. The pressure tap is marked with “pm”. The pressure test point is designed for a connection of steel tubing with a diameter of 6 mm. The steel tubing should be according DIN EN 10305-1. The pipe connection or fitting should be in accordance to DIN 2353. It may only be used seamless drawn stainless steel tubes according to DIN EN 10216-5:2014-03. Pipes not made of stainless steel or made out of non-metallic materials are not allowed. Pressure test point Figure 8: Location of the pressure test point 16. Temperature Measuring Point There is one temperature test point as shown in figure 9. The temperature tap is marked with “tm”. The temperature tap is locked with a screw (G ¼”). In case of using the temperature tap remove the plug screw and replace it by a temperature pocket with an integral thread of G ¼’’ . The temperature pocket is designed for a temperature sensor with a diameter of 6 mm. Notice: If the temperature tap of the Quantometer is not used the temperature measurement point should be located 1-3 DN downstream of the meter.

  • Page 17: Cleaning

    17. Cleaning For cleaning the meter from dust and dirt please do not use any solvents. It is suitable to use a damp cloth only for that purpose. 18. Transport and Storage The Quantometer and accessories shall be stored in the original packaging. Secure the measu- ring device from rotating or slipping. Be careful during loading and transportation to or from the measuring point. Some requirements for transportation and storage of the meter are: •...

  • Page 18: Annex A

    19. Annex A CE Declaration of Conformity Metreg Technologies GmbH...

  • Page 19: Annex B

    20. Annex B The pulse generators have an own ATEX approval and have the following marking: Pulse generator Sensor type EG-Baumusterprüf- Bescheinigung 94/9/EG Kennzeichnung auf den Impulsgebern LF-pulse generator Reed switch, Connection only magnetically to intrinsically safe circuits triggered when installed in hazardous area HF Pulse generator...
  • Page 20 Your contacts: Metreg Technologies GmbH Tränkeweg 9 15517 Fürstenwalde Germany Telephone +49 (0) 3361 733 900 - 0 Fax +49 (0) 3361 733 900 - 1 info@metreg-technologies.de www.metreg-technologies.de...

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