Turbine Gas Meter are flow meters designed to measure quantity of gases. The meters are mainly used for gas flow ranges from 6.5 up to 6500 m3/h. Other model available on request.

The Turbine Gas Meters are applied in measurement systems were high accuracy is required, such as:

• transportation of natural gas
• primary and secondary measurements
• flow measurement for technical purposes
• control metering of the natural gas and non aggressive technical gases in industry

General technical data

• pressure rating: PN16 to PN110, ANSI150 to ANSI600 other rates on request
• nominal diameter: DN50 up to DN300 standard range, other on request
• meter bodies: cast iron or carbon steel details in table 4 flow 6.5 to 6 500 m3/h other on request
• rangeability:
  1:20 minimum at atmospheric pressure
  Some smaller size meters have reduced ranges.
• upstream pipe: minimum 2 x DN
  meters meet the requirements of the OIML R32 89 Annex A
• temperature range:
  gas temperature -20°C to +60°C
  ambient temperature -25°C to + 70°C
  -30°C to + 60°C
• allowed medias: see table 2
• operating position: horizontal or vertical
• measurement accuracy: EU requirements and better
• guaranteed at least:
  0.2 Qmax – Qmax < ± 1%
  Qmin – 0.2 Qmax < ± 2%
• or in the spesial execution:
  0.2 Qmax - Qmax < ± 0.5 %
  Qmin - 0.2 Qmax < ± 1%

Measurement error typical curve: at low pressure (average 1 bara) green curve at high pressure (over 5 bara) blue curve

Physical properties of most popular gases that may be measured with the CGT turbine gas meters, density at 101,325 kPa and at 20?C

(tabel 2)

Index of protection of the index head is classified as IP65.

Measurement Outputs

Pressure And Temperature Outputs
The operating pressure (reference pressure) can be taken from the pressure taps, marked pr, located on both sides of the meter body.
The meters DN 100 and larger can be optionally equipped with two temperature taps for the measurement of the gas temperature.
The meters DN 50 and DN 80 can be equipped with 1 temperature well (optional).

Pulse Sensors
The Mechanical index unit indicates the actual volume of the measured gas at operating temperature and operating pressure. It can be rotated axially by 350° in order to facilitate the readings and enable easier connection of pulse sensor plugs.
The index unit is provided with one low frequency LFK reed contact pulse transmitter, as a standard. On request the index may be equipped with:

• LFI inductive pulse sensor (NAMUR)
• HF inductive pulse sensor (NAMUR)

Dimension and weight

Overall dimension and weights of Turbine Gas Meter are shown in table below.

Cast iron means the ductile iron (according to European Standard EN-1563)
The cast iron grade is EN - GJS - 400 - 15