Elster TRZ2 Turbine Gas Meter

Honeywell Elster TRZ2 turbine gas meters are robust meters used to accurately and reliably measure gas consumption in gas distribution, industrial plants or for commercial users. Over decades they have proven to be highly accurate from the first calibration on to the end of their lifetime many years later. This is why leading gas distribution companies around the globe rely on the TRZ2 for their standard gas metering applications.

Feature

• MID approval for fi scal measurement
• Conformity to EN12261, PED, ASME, ATEX and IECEx
• Lowest measurement uncertainty
• High repeatability
• Patented Measuring Cartridge
• Aluminum fl ow straightener
• Meter sizes G65 to G1.000
• Max. measuring range 5 to 1.600 m3/h
• Nominal diameters DN 50 to 150 (2” to 6”)
• Operating pressure from 0 to 100 barg
• Flange rating in PN 10-100 and ANSI 150-600
• Temperature range: -25 °C to +70 °C (acc. MID)
• Compact installation with inlet pipe length L = 2 DN
• Thermowell built into meter housing (optional)
• Integrated HF-pulser (optional)
• Absolute ENCODER (optional)
• Direct mount of Honeywell EVC (optional)
• Designed for natural gas, town gas,butane, air, nitrogen, other gases on request

Operating principle

The gas flowing through the meter sets the turbine wheel in motion; the number of revolutions is proportional to the volume passing through. A patented aluminium flow straightener eliminates flow disturbances such as swirl or asymmetric flow created by bends or T-pieces upstream, after which the cross section is reduced to increase flow velocity. The wheel shaft runs on ball bearings and drives, through gears and a magnetic coupling, the 8-digit mechanical counter in the pressure-less index head. The patented measuring cartridge is quick to replace in the field.

Pulse outputs and index head

• Standard: 2 low-frequency LF outputs (type E1, maximum 0.5 Hz, reed contacts) and 1 manipulation contact; 2.5 m open-ended 6-wire cable (IN-S10), with 6-pin connector versions (IN-S11, IN-S12).
• Optional: up to 4 high-frequency HF outputs (max. 2 of type A1S and 2 of type A1R), absolute encoder, integrated HF pulser.
• The S1 index head is IP67 with an 8-digit mechanical index and can be rotated by 350° without breaking any seals.

Standards

• Designed and manufactured to EN 12261 and OIML R137-1; directives MID 2014/32/EU, ATEX 2014/34/EU, PED 2014/68/EU; quality system per DIN EN ISO 9001:2008.
• Error limits per EN 12261: ±1% from 0.2 Qmax to Qmax and ±2% from Qmin to 0.2 Qmax; the standard measuring range is 1:20 (MID allows wider ranges depending on pressure).
• According to the manufacturer the TRZ2 is fire-proof (HTB) and can be used in critical C&I installations.

Installation and materials

• Mounting position: horizontal or vertical according to EN 12261.
• Inlet pipe: at least 2 DN for DN80–DN150 regardless of flow disturbance, and at least 5 DN for DN50 (no flow straightener). Outlet: a fitting in the nominal diameter of the meter.
• Meter body in ductile iron (GGG-40) or forged steel; turbine wheel in aluminium.
• For sizes larger than 6″ Honeywell offers the SM-RI-X turbine gas meter, up to 24″.

Information to send with a quote request

So that CAD can quote within 24 working hours, please send:

• Meter size (G65 to G1000) or the Qmin/Qmax to be measured, and the DN.
• Operating pressure, flange rating (PN10–PN100 or ANSI 150–600) and gas type.
• Pulse outputs required (LF, HF), the EVC or flow computer to use (for example the EK220), and thermowell or encoder options.
• Installation conditions (inlet pipe length, horizontal or vertical) and the project.