Rotary counter gasRVGG100 manufactured by ELSTER Gaselectronics is intended for measuring, collecting, storing and transmitting readings on the expenditure part of the consumed natural gas or other working environment that is not capable of harming the parts of the meter. The counter is suitable for such gas environments as argon, nitrogen, air. The device must not be used for oxygen and hydrogen! Before gas enters the device, the working environment must be dried and cleaned. To use the device for commercial purposes (commercial accounting), it is possible to connect electronic correctors of the type EK 270, SPG 741 (761), TS 220, VKG 2. Due to the absence of the device electrical circuit it does not have explosion protection categories.
According to climatic version gas meter rvgg100 corresponds to category C according to GOST R 52931-2008.
Counter rvgg100 able work on a gas pipeline under gas pressure up to 1.6 MPa at a relative humidity of up to 95%. All specifications summarized in one table.
Technical characteristics of RVG G100.
| Parameter name | Parameter value |
| Working pressure, MPa, no more | 1,6 |
| Relative humidity up to, % | 95 |
| Temperature environment, °С | -40 +70 |
| Working environment temperature, °С | -30 +70 |
| Relative measurement error, % | |
| in the flow range from Qmin to 0.1Qmax | ±2 |
| in the flow range from 0.05Qmax to Qmax | ±1.0 |
| Calibration interval, years | 5 |
| Average service life, years, not less | 12 |
| The degree of protection of the meter against the ingress of dust and water | IP54 according to GOST14254 |
| Meter body material | Aluminium alloy |
| Diameter conditional pass, mm | 50 |
| Dynamic measuring range | 1:30 |
| Maximum possible increase in measuring range | 1:160 |
The sensitivity threshold of the device is a gas flow rate of 0.16 m3/hour. The counter has a counting mechanism with a capacity of 10 7 . The price of the division of the roller with the smallest digit is 0.1. The measuring chamber has a volume of 1.07.
The composition of the counter.
Structurally, a case can be distinguished from the composition of the counter, with two bases in which bearings are built. Rotors synchronously rotating by means of gears (2 pcs.). Multi-stage gearbox, magnetic clutch and counting mechanism. All parts that have direct contact with the working medium are made of a special aluminum alloy with an anti-corrosion coating.
The device and principle of operation of the RVG G100.
The basic principle of operation of the device is the displacement of a certain amount of gas by rotors that rotate in different sides. The amount of gas that is displaced by the rotors is calculated depending on the volume of the measuring chamber of the device. The measuring chamber is formed by the internal volume of the meter body and the surface of the rotors. Rotation from the rotors is received by a gearbox and a magnetic clutch, which in turn transmit further movement counting mechanism. The counting mechanism can be rotated by 355°. This greatly simplifies the reading of the instrument readings. To measure the inlet and outlet pressure, there are places on the device body for connecting pressure sensors. For temperature sensors, there are also places for installation. Gas filter, which must be installed in front of the meter in without fail, can be mounted directly to the meter.
The meter is checked every 5 years. Verification can only be carried out by specialized service centers or manufacturer. Meters can be installed both vertically and horizontally. G100 are produced with nominal bore 80mm.
Overall dimensions of the counter.
| Dimensions, mm | Weight | ||||||||||
| Dy | Dk | DL | A | B | C | E | F | H | K | L | |
| 80 | 160 | 8 M16 | 435 | 165 | 272 | 180 | 171 | 228 | 290 | 141 | 16 |
Rotary gas meters type RVG are designed to measure the volume of gas under working conditions (purified and dried: natural and city gas, propane, nitrogen, compressed air and inert gases) in thermal power plants of industrial, municipal and other enterprises, for commercial accounting of consumed gas. For the accounting OXYGEN counter use forbidden!
Before the meter, it is necessary to install a filter for gas purification from mechanical impurities (the size of solid particles in the measured gas, according to the largest measured value, should not exceed 0.08 mm).
The RVG gas meter registers the volume of gas under operating conditions. To bring the measuring volume of gas to the volume at standard conditions RVG meter can be equipped with EK270 or TC220 electronic correctors.
Distinctive features of RVG gas meters:
- high reliability and measurement accuracy with pulsating and intermittent gas flow
- small inertia of the mechanical system
- wide measuring range
- low pressure loss across the meter
- no requirements for the length of straight sections, misalignment of the meter and the degree of non-circularity of the pipeline
- the ability to work with electronic proofreaders EK-270, TS-220
- work on horizontal and vertical sections of the gas pipeline
- independence of measuring accuracy from gas pressure in the network
Main technical characteristics
| Product parameters | RVG G16 | RVG G25 | RVG G40 | RVG G65 | RVG G100 | RVG G160 | RVG G250 | RVG G400 | |
|---|---|---|---|---|---|---|---|---|---|
| Ambient temperature range, °C | -40 to +70 | ||||||||
| Measured medium temperature range, °C | from -30 to +70 | ||||||||
| Maximum operating pressure, MPa (kgf/cm²) | 1,6 (16) | ||||||||
| Nominal diameter, mm | 50 | 80 | 100 | 100 / 150 | |||||
| Maximum throughput at pressure close to atmospheric, m³/h | 25 | 40 | 65 | 100 | 160 | 250 | 400 | 650 | |
| Measuring range of gas volume, Q min / Q max | 1:30 | 1:30, 1:50, 1:65 | 1:30, 1:50, 1:65, 1:80 | 1:30, 1:50, 1:65, 1:80, 1:100, 1:160 | |||||
| Measurement error of gas meters RVG | no more than ±1% in the flow rate range from 0.1Q max to Q max no more than ±2% in the range of costs from Q min to 0.1Q max |
||||||||
| Overall dimensions, mm | - length L | 171 | 241 | 260 | |||||
| - width B | 335 | 435 | 469 | 529 | 660 | ||||
| - height H | 222 | 278 | 308 | ||||||
| Weight, kg, no more | 12 | 16 | 33 | 39 | 50 / 56,5 | ||||
| Calibration interval | 5 years | ||||||||
| Service life, years, not less | 12 | ||||||||
Rotary gas meters RVG are designed for commercial and process flow metering of purified and dried gaseous media: natural gas, propane, hydrogen, air, nitrogen and inert gases.
Rotary meter RVG works on the principle of displacement of a strictly defined volume of gas by rotating rotors. The volume of the displaced gas is determined by the volume of the measuring chamber of the counter formed by the inner surface of the housing and the surfaces of two rotors rotating synchronously in opposite directions. The rotational movement of the rotors through the reducer and the magnetic coupling is transmitted to an 8-digit counting mechanism, which registers the number of revolutions of the rotors, and hence the volume of gas that has passed through the counter.
The RVG gas meter registers the volume of gas under operating conditions. To convert the measuring gas volume to the volume under standard conditions, the RVG meter can be equipped on request with an electronic corrector of the or type.
Specifications:
Name |
DN, mm |
Qmax, m3/h |
Pmax, MPa |
Measuring range Qmin/Qmax |
Threshold (m3/h) |
Weight, kg |
| 50 | 25 | 1,6 | 1:30 | 0,10 | 12 | |
| 50 | 40 | 1,6 | 1:30, 1:50, 1:65 | 0,10 | 12 | |
| 50 | 65 | 1,6 | 1:30, 1:50, 1:65, 1:80 | 0,10 | 12 | |
| 50 | 100 | 1,6 | 1:30, 1:50, 1:65, 1:80, 1:100, 1:160 | 0,10 | 12 | |
| 80 | 160 | 1,6 | 0,16 | 16 | ||
| 80 | 250 | 1,6 | 0,25 | 33 | ||
| 100 | 400 | 1,6 | 0,40 | 39 | ||
| 100, 150 | 650 | 1,6 | 0,40 | 50/56 |
Measuring complexes based on the RVG gas meter: (temperature correction) and (correction for temperature and pressure)
Main parameters:
- The range of measured flow rates is from 0.8 m3/h to 650 m3/h;
- Working gas pressure is not more than 1.6 MPa;
- Flow measurement range Qmin / Qmax: up to 1:100 (up to 1:160 for G400)
- Measurement error:
No more than ±1% in the flow rate range from 0.1Qmax to Qmax;
No more than ±2% in the range of flow rates from Qmin to 0.1Qmax;
- Temperature ranges:
Gas meter rotary RVG is designed to measure volumes of purified and dried non-aggressive gases such as natural gas, city gas, propane, air, nitrogen, inert gases.
Purpose:
Technological and commercial accounting of the volume of non-aggressive, dried and purified gases: natural and city gases, propane, air, nitrogen, inert gases, etc. in heat power plants of industrial, municipal and other enterprises.
Available meter options and options for ordering:
RVG G16 Qmax=25 m³/h, Pmax=1.6 MPa, DN=50 mm, Qmax/Qmin
RVG G25 Qmax=40 m³/h, Pmax=1.6 MPa, DN=50 mm, Qmax/Qmin
RVG G40 Qmax=65 m³/h, Pmax=1.6 MPa, DN=50 mm, Qmax/Qmin
RVG G65 Qmax=100 m³/h, Pmax=1.6 MPa, DN=50 mm, Qmax/Qmin
RVG G100 Qmax=160 m³/h, Pmax=1.6 MPa, DN=80 mm, Qmax/Qmin
RVG G160 Qmax=250 m³/h, Pmax=1.6 MPa, DN=80 mm, Qmax/Qmin
RVG G250 Qmax=400 m³/h, Pmax=1.6 MPa, DN=100 mm, Qmax/Qmin
RVG G400 Qmax=650 m³/h, Pmax=1.6 MPa, DN=150 mm, Qmax/Qmin
Range extension (optional), Qmax/Qmin
Range extension (optional), Qmax/Qmin
Range extension (optional), Qmax/Qmin
Range extension (optional), Qmax/Qmin
Pulse sensor E1 IN-S10 for RVG S10 meters
Principle of operation:
Rotary gas meter RVG works on the principle of displacement of a strictly defined volume of gas by rotating rotors. The volume of the displaced gas is determined by the volume of the measuring chamber of the counter formed by the inner surface of the housing and the surfaces of two rotors rotating synchronously in opposite directions. The rotational movement of the rotors through the reducer and the magnetic coupling is transmitted to an 8-digit counting mechanism, which registers the number of revolutions of the rotors, and hence the volume of gas that has passed through the counter.
The RVG gas meter registers the volume of gas under operating conditions. To bring the measuring volume of gas to the volume under standard conditions, the RVG meter can be equipped with electronic correctors EK270, EK260, or TS215, TS210.
Distinctive features:
The range of measured flow rates is from 0.6 m3/h to 650 m3/h;
Working gas pressure is not more than 1.6 MPa;
Flow measurement range Qmin / Qmax:
up to 1:160
Temperature ranges:
environment from minus 40 to plus 700С;
measured medium from minus 30 to plus 700C;
Limits of permissible relative error of the main version:
no more than ±1% in the flow rate range from 0.1Qmax to Qmax;
no more than ±2% in the range of flow rates from Qmin to 0.1Qmax;
Limits of permissible relative error of the additional version, which has the letter "U" in the designation:
no more than ±1% in the flow rate range from 0.05Qmax to Qmax;
no more than ±2% in the range of flow rates from Qmin to 0.05Qmax;
Calibration interval 5 years.
Main characteristics:
high metrological characteristics;
a wide range of measured costs;
low pressure loss across the meter;
speed and high accuracy pulse mode operation;
lack of requirements for the length of straight sections, misalignment of the meter and the pipeline and the degree of non-circularity of the pipeline;
installation on horizontal and vertical sections of the pipeline;
independence of measurement accuracy from the pressure and nature of the gas flow in the network;
the ability to work with electronic correctors EK270, EK260, EK-88*, TS210, TS215, TS-90*;
the possibility of using a high-frequency A1K and a mid-frequency R300 sensor in SG-EK complexes with an EK270 corrector to control gas flow;
energy independence.
*- electronic proofreaders are discontinued
Specifications:
Measuring range Qmax /Qmin 1: 30 (optional 1:50, 1:65, 1:80, 1:100, 1:160)
Measurement error: in the range from Qmin to 0.1 Qmax 2%
in the range from 0.1 Qmax to Qmax 1%
Sensitivity threshold 0.1 - 0.40 m3/h
Maximum working pressure 1.6 MPa
Temperature range:
– environment from -30 °С to +70 °С
– measured medium from -20 °С to +60 °С
Calibration interval 5 years
