Turbine flow meter for gas Energoflow EFS-T

Reference Turbine Gas Meters EFS-T

Overview

Reference Turbine Gas Meters EFS-T are intended for installation on reference calibration rigs for calibration and verification of gas meters of any type with air as operating environment. The meters are equipped with electronics unit (EU) and rotary transducer with mounted binary pulse-frequency sensors and pressure sensors. 

The meter EFS-T is intended for measuring the volume of gas passing through its input channel of circular section. The gas flow volume is transmitted to a PC via the EU. The meters are designed for vertical installation on the reference equipment with DN 50 mm, DN 80 mm, DN 100 mm, DN 150 mm, DN 200 mm, DN 250 mm, DN 300 mm, DN 400 mm. 

Connection between the meter and PC is carried out via RS-485. Exchange protocol - ModBus RTU. “Start-stop” synchronization is of two-wire type based on the communication line RS-485.   

TABLE -1

DN Standard size Qmax, m 3 /h Qmin, m 3 /h
400 G6500 10000 500
400 G4000 6500 325
300 G4000 6500 325
250 G2500 4000 200
200 G1600 2500 125
150 G1000 1600 80
100 G400 650 35
80 G250 400 20
50 G100 160 8

TABLE - 2

Parameters Value
General industrial application design Explosion-proof design
Measuring medium air
Operating pressure, MPa 1,6; 4,0; 6,3
Limits of basic relative permissible error,
not worse %		 ± 0,2
Repetition, at least % ± 0,03
Repeating accuracy within 2 years, at least % ± 0,1
Frequency output with adjusted multiplication factor Fmax, kHz 5
Signal of flow rate excess for the emergency system shutdown Type «dry contact»
Loading capacitance of emergency output shutdown:
voltage, V, max
max current, mA, max

24
20
Operating conditions:
-Temperature of operating environment and ambient air, °C, at least
- Relative humidity of air at temperature
+25 °C, %
- atmospheric pressure, kPa

10 up to 30

up to 80
from 84,0 up to 106,7
Power consumption, W, max 0,5 6,0
Supply voltage, DCV from 9 up to 24
Lifetime, min. years 10
Archive data: 
  • hourly- for every preceding hour - size of archive 1488 records (62 days);
  • daily- for every preceding day - size of archive 730 records;
  • power on/off instances - size of archive 512 messages;
  • emergency situations - size of archive 720 messages;
  • intervention - changing the adjustment parameters (size of archive 889 messages).
Control software program is used for recording, viewing and changing the settings of the flow meter , recording and viewing of measurement data, as well as for reading data archive.

This program allows you to view the archive data and modify the flow meter settings via a PC monitor and then upload the archive data to a file on the flow meter. The flow meter provides protection of settings and archive data from unauthorized changing by restricting access through a system of passwords and hardware based protection of configuration from being overwritten.

APPENDIX A - General Appearance

Turbine Gas Meter EFS-T
Turbine Gas Meters EFS-T

APPENDIX B - Possible solutions of meter mounting

Picture B.1
Picture B.2
Picture B.3

APPENDIX C -Dimensions of the meter with straight run

Dimensions of the meter with straight run

TABLE - 3

DN, mm Rating, MPa L, mm D1, mm n d, mm

50		 1,6

150		 125

4		 18
4,0 125 16
6,3 135 22

80		 1,6
240		 --
8		 18
4,0 160 16
6,3 170 22

100		 1,6
300		 180
8		 22
4,0 190
 20
6,3
 200 26

150		 1,6
450		 240
8		 22
4,0 250 24
6,3
 280 33

200		 1,6
600		 295
12		 22
4,0 320 27
6,3 345 33

250		 1,6
750		 355
12		 26
4,0 385 30
6,3 400 39

300		 1,6
900		 410 12 26
4,0 450
16		 30
6,3 460 39

400		 1,6
1200		 580
16		 30
4,0 670 42
6,3 715 48

APPENDIX D - Order code for reference turbine
gas meter

EPS-T/200/1600/20/0,2/0/0/0/1/1/S

TABLE - 4

# 1 2 3 4 5 6 7 8 9 10 11 12 13
EFS- T D G N P Ak Sm Mp I Dp Dt S

Legend explanation of typical order codes is given 
in Table 4

# Elements Legend Meter's characteristics
1 EFS- Type of the reference meter.
2 Т Type of meter sections: Т - turbine
3 D Nominal meter diameter, mm
4 G Meter standard size
5 N Flow range:20 – 1/20 Qmax, 30 – 1/30 Qmax
6 P Absolute operating pressure (1,6; 4,0; 6,3) МPа.
7 Ak Meter accuracy: 0,2%
8 Sm Counting mechanism: 1 – yes, 0 – no.
9 Mp Availability of seal oil pump: 1 – yes, 0 – no.
10 I Type and quantity of pulse sensors:
0 – no,
1 – one low-frequency (LF),
2 – one high (HF),
3 – one low-frequency (LF) and one high (HF),
4 – two high (HF),
5 – one low-frequency (LF) and two high (HF).
11 Dp Availability of the pressure sensor: 1 – yes, 0 – no.
12 Dt Availability of the temperature sensor: 1 – yes, 0 – no.
13 S Section material : S- Steel.20, А – stainless steel.
Turbine Gas Meter EFS-T
Reference Turbine Gas Meters EFS-T

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