BSEE 40th ANNIVERSARY ISSUE
MTM Turbine gas meters MID & OIML Approved
TM Turbine gas flow meters are now available in the UK exclusively from Bell Flow Systems. Manufactured by Metreg Technologies who offer a complete product range for fiscal and non-fiscal gas flow meters for industrial and commercial applications. MTM Flanged Gas Turbine Flow Meters have Approvals to MID Class 1 (DIN EN 12261:2002) OIML R137-1&2: 2012, PED (PED 97/23/EG). The MTM Gas Meter is suitable for installation in hazardous areas of Category 2 (Zone 1) II 2 G c IIC T4 X. MTM Gas turbine flow meters are ideal for commercial metering and custody transfer measurement applications, suitable for measuring natural gas in pipe sizes from DN50 up to DN300 and larger. The MTM turbine meter is exchangeable for different pressure housing designs. It can be calibrated in each diameter size to the different G-ratings. Operating pressures up to 100 bar and a volume flow rates of 5 m3/h up to 6500 m3/h depending on the different meter sizes at operating conditions. Available with a choice of flanges, these robust flow meter models have an Aluminium rotor and body made of anodized high strength Aluminium, Carbon Steel or a welded steel construction dependant on size and spec. A Low frequency pulse is included as
M
BSEE
standard with HF and multiple pulse options for remote monitoring, data recording and linking with Building Management Systems (BMS) as well as with our MID approved (EVC) gas volume correctors and Telemetry devices.
Design Strength
The lifetime durability of the MTM turbine meter is very stable due to the large dimensioned high precision ball bearings manufactured in Germany, along with the high precision machining of the body and all
PowerBreaker – still the forefront of RCD Technology
November 2019 and GreenBrook are the first to ensure their PowerBreaker RCD products adhere to the latest regulations. To explain in simple terms; the new standard requires Type A RCDs and Type AC RCDs. Type A RCDs can detect pulsating DC currents and surge faults that Type AC RCDs may not detect. Pulsating DC currents are created from faults in modern electronic equipment such as EV car chargers,
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solar panels, multi-media equipment, USB sockets, i-phone chargers, SONOS, Alexa etc. This new standard requires much more rigorous testing of the RCDs with high voltage and short circuit tests. Products that adhere to this standard have a more sensitive/stable trip window so are a much safer defence against electrocution. Another visible change to this standard is the additional markings on the front plate and the coloured flag indicators; which must now be green and red. To keep with our stylishly design front plate, these indicators are
urther amendments to the safety standards BS7288-2016 are due at the end of
moving parts on state of the art machine centre’s . After machining, all Aluminium parts, especially the turbine wheel, are hard anodized for reduced friction and higher resistance to mechanical wear and tear or chemical attack.
Low Pressure Loss
The pressure loss of the MTM turbine meter is minimized through a dynamically optimized inlet diffusor, very low manufacturing tolerances and high precision, low friction ball bearings. The optimized flow conditions
allow a minimal straight inlet pipe of 2 DN for low level flow disturbances and only 2 DN additional straight inlet pipe length under severely disturbed flow profile according to OIML standards. MTM turbine meter housings are manufactured on a standard basis with raised face (RF) flanges according to DIN/EN 1092-1 or ANSI B 16.5 for class 150/300/600 with a maximum operating pressure of 100 bar/10 MPa.
Bell Flow Systems
mail@bellflowsystems.co.uk or call 01280 817304 for more information on the Metreg gas meter ranges.
placed within the window. A RED flag shows the device is ON with a live supply to the appliance. A GREEN flag shows the device is safe with the supply to the appliance switched OFF. GreenBrook are part of the BEAMA Technical Committee who helped to write the revised standard.
For further details please visit:
www.greenbrook.co.uk Read the latest at:
www.bsee.co.uk BUILDING SERVICES & ENVIRONMENTAL ENGINEER OCTOBER 2019 33
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