Types of devices according to the method of metering
Gas meters can be electronic or mechanical. For the consumer, such a difference makes little difference. The first ones use pulses for metering and show the data on the LCD display, and the second ones use the torque transmitted to the gears. In this case, instead of the display there will be rotating rollers with numbers.
Digital meters are equipped with a display
The equipment for metering of gas consumption is diverse. There are several types of such devices, differing in the principle of operation. Let’s consider each one in detail.
Option #1. rotary or rotary
Represents a chamber metering device with eight-shaped rotors, which are used as transducer elements.
Structurally the device consists of a body, counting and transmitting mechanisms. Inside the housing there are two rotating rotors of the same size in the form of a figure of eight. one of them is connected to the transmission and counter mechanisms.
Casing equipped with inlet or outlet or outlet or bottom gas connection. When the latter begins to flow into the case, a pressure difference occurs, which prompts the rotors to rotate.
They do this synchronously, for which gearwheels fixed in endboxes are responsible. As they rotate, the rotors touch each other on their sides, which is necessary for the counting process.
The volume of gas that is displaced by one rotor in half of its revolution is equal to the volume corresponding to the amount of gas bounded by the inside of the housing and the surface of the rotor in the vertical position. For each complete revolution of the two rotors, four such volumes are displaced from the case. Consequently, the flow rate of the gas passed through the meter is easily accounted for.
The advantages of these devices include a large measuring range and high flow capacity. They are also quite compact.
In addition, the devices are durable, energy-independent, not sensitive to short-term overloading. Their noise level is considered average and is almost imperceptible. The disadvantages are the short calibration periods. It is only 5 years old.
Option #2 is a diaphragm or membrane meter
Is a gas meter of chamber type, used for registering small gas flows. The body of the device is divided into two parts. The upper chamber has the gas inlet and outlet nozzles.
The two body parts are firmly joined together. Between them there are special gaskets and a paste-like sealant. Also inside the case there is a measuring mechanism of diaphragm type.
It consists of two chambers, resembling bellows. Each of these chambers is connected to a common slide valve mechanism by means of levers and cranks. Gas supply channels run through it.
The number of chambers may vary, and the accuracy and class of the measuring device depends on their number. The spool mechanism by means of a shaft is connected to the counting device fixed on the housing.
When gas enters the unit, it is successively expelled from the switching chambers. This leads to an alternate movement of diaphragm plates. As soon as one chamber is filled, the spool mechanism switches over and the chamber starts releasing gas.
This cycle is repeated many times. It is accompanied by a diaphragm shift. This displacement activates a counter mechanism that registers the gas discharged from the chambers per unit of time.
Diaphragm type meters are distinguished by their high measurement accuracy. Their simple design gives them a considerable service life of at least 20 years. These appliances are simple to operate and economical.
However, it is very difficult to disguise a diaphragm counter if necessary. Another disadvantage. rather high cost of equipment. The verification period of the diaphragm-type instruments is 10 years.
Option #3. turbine meter
The device got its name due to a small turbine, the wheel of which rotates under the pressure of the gas flow entering the device.
Structurally, the equipment is a piece of pipe equipped with flanges. Starting from the inlet connection the following mechanisms are located in the case of the device in series: jet rectifier and the turbine itself with rotation supports and the shaft.
For continuous operation of bearings the lubrication is necessary, that is why a pump unit is mounted on the meter’s body. It is used to supply oil to the rotating elements through special tubes.
Installing natural gas service: New home construction
The principle of operation of the measuring device is quite simple. The revolutions of the rotating turbine are transferred via a reduction gearing to a special counting mechanism mounted outside the gas cavity.
Turbine meters can be equipped with additional detectors to measure pulses, temperature or pressure. In addition, the measuring process can have three degrees of automation. Absence of automation means that the user reads the device himself.
Semi-automatic measurements imply that a calculating device controls the process, but manual correction of the indices, settings, etc. is possible.п. Full automation of measurements supposes that readings of measuring device are received by computing device, which processes them and sends to the accounting center.
The advantages of turbine meters are considered to be energy independence, construction reliability and easy maintenance. Can handle gases that are not of the highest purity. Noise level, produced by device, can be characterized as low. Many sizes of turbine meters are available from producers.
The disadvantages of the equipment are inaccuracies in measurement. If the device works continuously, the error is minimal, if in pulsating mode, the measurement distortion increases significantly. Verification period. 8 years.
You can check the mains gas meter without removing the device from its regular place. How to do this test is described in detail in our recommended article.
In order to get the most accurate readings of the flow meter, which takes into account the consumption of gas, now produce devices aimed at a certain type of consumers:
Top 5. Turbulence-DON Grand-1.6
Grand-1 gas meter.6. is a membrane household measuring device, which is simple, quality and affordable. Many users appreciated not only the accuracy of measurements and ease of installation, but also the design of the gas meter. It is compact, modern and performed in three colors. According to the technical information verification every 12 years, but in practice this is not the case. The meter is energy independent and is equipped with a battery, the last one takes 5 years on average. After its replacement (as well as any other intervention) requires an extraordinary verification.
1990 / Russia / size G-1.6, lifetime 24 years
What is the best gas meter to install in the apartment. types, description and cost
Gas meter appeared in the kitchen quite recently. There is a lot of controversy about the expediency of buying a metering device. Some people say it is a waste of money, others say it is a great helper in the fight to save the family budget. Which statement is more true, let’s deal. In this article we will consider the types of gas metering devices, their description, price, and which of them is more suitable for a private house and which for an apartment.
In any dwelling, whether it is your home or a city apartment, subject to the gasification of the building, you can install a gas meter to monitor the consumption of blue fuel. Its installation is not only of a monitoring nature. When used wisely, a gas meter helps you save on gas service costs. Devices accounting for blue fuel, can be divided into the following types:
All of the above devices have typical differences between them, in terms of performance characteristics and features of work. In the end, depending on the total operating parameters, the price of gas meter is determined.
What is a gas meter, as a measuring device?
The purpose of the device is to account for the amount of gas in cubic meters, passing through the construction of the device. Gas meter is installed in the gas pipeline for a long period, for this reason it is important to choose a high quality and reliable product.
A wide range of models, provides the ability to choose the gas meter for outdoor work or just for the premises. The cost of some of them impresses by an impressive price tag.
Nevertheless, given that the acquisition of the meter contributes to the control of cost savings, expensive meters quickly recoup the costly investment.
Variety and types of gas meters
All gas metering devices according to their design can be divided into such basic varieties as:
Screw (rotary). Their use is resorted to in boiler and boiler installations, as well as in the industrial sector. They do not depend on electricity, are not susceptible and not vulnerable to excessive loads and overloads, are characterized by a significant output capacity.
Diffuser. Designed to be operated in their own homes or apartments. They are characterized by reliability, low measurement error and not high price. Commonly such devices are called diaphragm devices. This gas meter is the most common among domestic control tools. Affordable price and high accuracy. these are the main positive characteristics of the device.
Rotary (vortex). The mechanism of such meters is the oscillation. These gas flow meters work from the vibration created by the pressure created by the gas flow.
Drum. Suitable for various laboratory applications.
Choice of a meter for gas accounting should be thoughtful and considered. this approach will save you in the future from potential problems that may arise during its operation, as well as help you save money and save fuel consumption. Let’s make a small rating of gas meters that deserve the attention of demanding buyers.
One of the popular devices is the meter Grand from the Rostov manufacturer. It provides quite accurate data on the flow, rarely fails and breaks, its feature is the ability to install it in two positions. horizontal and vertical.
Another meter that is in demand is a membrane meter Gallus of Actaris. These diaphragm devices are used, for the most part, in domestic conditions, however, not seldom they are installed in public utilities.
Almost all Gallus devices are equipped with a slot for Smart-card A lot of models of Gallus energy accounting devices are equipped with a slot for Smart-card contact, allowing to take data on the status of the meter and give the current bill. In addition to the products listed above, products by Elster, Elekhant and Betar are also common.
Buying a gas meter
To find out the price of the meter, choose a model and make an order you can in many online stores that specialize in it. They have a wide range of products with detailed descriptions, photos, kitting.
Often in such virtual stores there are various promotions that offer discounts on certain products, or there are sales, thanks to which you can buy a device relatively cheap.
The order can be placed directly on the page of the store by yourself or contact our consultants. Delivery can be free of charge, through postal or logistic organizations to any part of the country.
Gas meter sgk-4
One of the available and widespread meters is a product of the company Elektropribor in Voronezh. Similar products are produced by d. Vladimir. widespread in services of housing and communal services. The manufacturer provides warranty service for 2 years from the date of installation.
Private individuals also use the device to measure the spent volume of natural and liquefied gas in apartments and private homes. Has the following characteristics:
- Model designation. SGK-4.0;
- Limit gas flow rate. 6 cubic meters per hour;
- Ultimate working pressure. 3 kilopascals;
- weight 2.4 kg;
Uninterrupted operation possible at temperatures from minus 20 to 60 °C plus.
Gas meter Bethar sgbm-1.6
Household gas meter is designed for operation in the home. Operation is guaranteed at temperatures from minus 10 to plus 50 °C. Engineers took care of maximally compact dimensions of the device taking into account small space of kitchens in city apartments.
GAS METERS, a gas tutorial on all you need to know about gas meters for trainee gas engineers.
Can be installed horizontally and vertically. Equipped with a display to show flow rate information. Has the following parameters:
- name. SGM. 1,6;
- The limit gas flow rate is 1.6 cubic meters per hour;
- the maximum working pressure is 5 kPa;
- weight. 0.7 kilograms;
The device contains a lithium battery, it powers the gas meter, without it the information will not be displayed on the liquid crystal display. Battery replacement is not required for at least 12 years, then the power supply can be changed according to the instruction manual or video review Gas meter betar sgbm-1.6 how to replace the battery:
Gas meter BK G4 (there is a left and right)
In many utilities are quite flattering reviews of the gas meter company Elster, the purpose of which is the quantitative accounting of consumed energy resources and evaporation of liquefied gas.
Functional capabilities allow you to operate the gas meter both outdoors (equipped with a thermal corrector), and inside buildings. Elster device has the following characteristics:
- name. BK (G10) T;
- Working pressure is 50 kilopascals;
- Maximal gas flow rate is 16 cubic meters per hour;
- weight. 5,8 kg;
- Functionality is maintained at temperatures from minus 20 to plus 50°C;
BK gas meters have long ago gained an excellent reputation and good reviews in the domestic market. Ease of maintenance, reliability and reasonable price contributed to this fact. When choosing this device, please note that the kit does not include mounting parts.
Membrane type gas meter NPM G4
One more gas meter, which is widespread in the public sector, is a product of Gasdevice joint stock company. A design feature of this device is the ability to provide data to the energy registration system.
Available in right-hand and left-hand versions. Its advantages are high reliability of measurement, calibration option and a Smart-card slot.
- The name is NPM g4;
- Working pressure is 10 cubic meters per hour;
- working pressure. 100 kilopascal;
- weight is 1,7 kilograms;
The inspection interval is six years. Warranty on serviceability of the counter PNM g4 is 36 months from the date of installation, and the declared service life exceeds 20 years.
Gas meter SG-16 (MT) 100
In the industrial industry the SG-16 (MT) 100 gas metering product is well-proven. The mechanism of its operation consists in rotation of the turbine element by means of fuel flow energy.
The number of turbine rotations is calculated by a built-in device that shows the volume of the gas that has passed through the meter.
The verification interval is five years. Does not lose its operability at temperatures from minus 30 up to plus 50°C.
Gas meter RSG Signal-100-G250
In order to measure the quantitative volume of gas fuel of all kinds in boiler plants and gas-sorting stations in order to calculate the financial costs often use the device gas accounting RSG Signal-100-G250. The design of the product allows to mount it in longitudinal and transverse positions.
- Name. RSG Signal-100-G250;
- working pressure. 1,6 megapascals;
- dynamic range. from 1:20 to 1:160
- weight. 43 kilograms;
- inter-check period. six years;
Electronic meter, that opened a new level in gas-metering industry, is an electronic device SGB-1,8G by Elekhant. It calculates the consumed gas energy carrier consumption and, in addition, stores, but still saves the previous results, as well as generates a consumption history. A small interesting bonus is an interchangeable cover, allowing to change the color of the device to a color closer to the general color of the room.
- marking. SGB-1,8 (G);
- pressure. 5 kilopascals;
- Limit flow. 1,8 cubic meters/hour;
- connection thread. 0,5 inch;
- weight. 0,3 kilograms;
The advantages are also the small size of the meter.
Among the electronic metering devices, the Helikon G1 is also worth mentioning.6. Its purpose is to measure the quantity of consumed gas and liquid hydrocarbon fuel in medium-low pressure gas mains. Characterized by a compact, modern design, high reliability and high temperature resistance.
- Marking. Helikon G1.6;
- Peak consumption is 1.6 cubic meters per hour
- maximum allowable pressure. 5 kilopascals;
- checking interval. 10 years;
One can note its low error in case of temperature fluctuations. Lithium battery. AA battery with a rated voltage of 3.6 volts. Easy to install.
Mechanical metering means
Among mechanical devices, the counter of the German company lster is recognized among the population. Device purpose. economic accounting of the consumed dry fuel quantity. Designed for installation in rooms with gas household stoves, the device can be installed in homes equipped with gas stoves and columns, as well as heating boilers that use gas fuel of small capacity.
- Model marking. BK-G6;
- The highest flow rate is 10 cubic meters per hour;
- Peak pressure. 50 kilopascals;
- mating thread. 31,8 mm;
- mass. 3,5 kilograms;
- inspection every 10 years;
Another representative of membrane measuring household devices for registering the consumed volume of gaseous fuel. NPN G4 Omega. Designed with a two-way (optional) fuel supply. right and left. Does not require calibration, accurate readings.
- model. NPN G4 Omega;
- Limit gas flow rate. 6 cubic meters per hour;
- working pressure. 5 kilopascals;
- weight. 1,6 kg;
- checked once in 10 years;
Nuances of gas meter selection
Before proceeding directly to the process of purchasing a meter, you should know all the positive and negative qualities of the meter. In this regard, it seems very reasonable to turn to a competent in this area specialist. It will help to calculate the number of devices, calculate the average fuel consumption in cubic meters per hour.
On the basis of such data it will be possible to choose a gas meter for a particular room more accurately. In any case, the main conditions for the selection of measuring gas devices are the following indicators:
The meter for the house
When buying a meter for gas in your home, it is necessary to consider the number of devices that will consume gas, this is necessary to calculate the capacity. For an ordinary residential house, all requirements will meet the size of the device G 4, which passes up to 5 cubic meters of gas per hour. When the boiler is busy or if you have a boiler room, the gas meter is better to take G 16, which already passes up to 25 cubic meters per hour.
You should also consider the diameter of the gas pipe and the slot in the meter.
Gas meter for a city apartment
Buying a meter in the apartment, you need to consider these factors:
date of issue of the device. From this will depend on when it should be handed over for inspection and its resource;
choose the right size. If there is a kitchen stove, G 1,6 is enough, if there is also a gas column will be enough G 2,5, with autonomous heating. G 4-6.
Meter on the street
Here the main factor is the temperature, its fluctuations and the impact of the external environment. On this basis it is necessary to take into account:
The presence of a thermal compensator. The price of the product with it will be more expensive;
The meter located outdoors must be enclosed in a box, which will keep it from the external environment;
Noisiness of the device, especially in winter, when fuel consumption increases.
How to choose a gas meter for an apartment
Before thinking about what kind of gas meter is better to install in the apartment, you should know that the owners of premises with only a gas stove, the sole purpose of which is cooking, are not required to do this. Although no one forbids the opposite. If your apartment doesn’t have a meter, you pay for the gas you use based on the norms and the number of family members. As a rule, if the latter is small, then there is no special advantage in the installation of gas meters, even though the cost of payment is reduced.
The fact is that the initial cost of installing gas meters is very tangible, and in such cases, their payback will be quite a long time. In addition, you must also take into account the need to bear the cost of maintenance of the meter, including verification. But if the family is large, then the presence of a meter will definitely lead to savings.
However, if the apartment, in addition to the gas stove, installed boiler or boiler, then without a meter is not a question not only of savings, but also of compliance with the law, according to which such premises must be equipped with measuring instruments.
Choosing a gas meter, it would seem, is not a particular problem, given the fact that the market for this type of product offers quite a lot. But it is not always easy to make the final decision. Of course, you can be guided by the price, but in this case. this is not always the most correct and basic criterion. You also need to take into account other factors, and above all. its place of operation. And this is an apartment, that is a room, usually a small area.
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What to consider when choosing a gas meter for the apartment
When choosing a gas meter for the apartment you need to take into account the following criteria:
- the size of the device. Small meters are more preferable, it is much easier to find a place to install them, and their compactness will not allow them to dominate the interior;
- Noise level during operation. Most gas meters are quite noisy devices, but not all. For example, electronic models produce practically no noise effect;
- intervals of verification. This criterion must also be considered when choosing, since each verification. it is always a financial expense and quite tangible, since it is necessary to pay not only for the metrological procedure itself, but also for the removal and subsequent installation of the meter in its place;
- service life of the device. Here also: the longer you can operate the meter, the more profitable, since you will have to bear the cost of replacing it less often;
- price. This criterion is always important when choosing, it is also relevant when buying a gas meter. But you should know that the cost of the product, as a rule, is in direct correlation with the previous criteria used in the choice. That is, for example, an electronic meter is more expensive than a rotary one, but it works quietly and serves longer.
But this is not all. Choosing a gas meter in the apartment, it is necessary to take into account the technical characteristics of the meter itself and, above all, the two most important parameters, namely:
Gas consumption limits, which determines the capacity of the device. For example, if your apartment has only a gas stove, the consumption in the range of 1.6-2.5 m 3 / h is sufficient, but if you have, for example, two-circuit boiler, you need to buy a measuring device with parameters from 4-6 m 3 / h and above, depending on the capacity of heating equipment;
And yet, be sure to take into account the fact that gas meters are of two types: “right” and “left. Therefore, when choosing a device, you should always take into account the location of pipes and the location of the meter. Select the measuring tool should also be based on these data.
If you need to install gas meters in the apartment, it is best to entrust this work to professionals. In our online store you can easily, with the help of specialists, choose and buy a gas flow meter at an affordable price.
How to choose a gas meter
Despite the fact that the approval of the project for the installation of meters requires the submission of meter data sheet, the choice of equipment should be made only after consultation with experts. Be sure to ask about the list of approved devices, because unlicensed devices can not be put into operation.
In order to choose a flow meter, you should also take into account its technical characteristics, paying special attention to two criteria: flow capacity and type of device.
The first criterion depends on the number and power of gas appliances installed in the house. For a single plate, for example, a flow capacity of 1.6 m3 /h is sufficient. This parameter is indicated on the front panel and can be found out by looking at the value indicated after the letter “G”, that is, in this case you need a device marked G1,6.
The choice of the meter depends on the capacity of the gas appliances. For example, if for a gas stove it is from 0.015 to 1.2 m 3 / hr, then the counter with the parameters of 1.6 m 3 / hr is optimal. In case several appliances are installed and operated, the minimum values of the least powerful and the limit data of the high flow rate one should be taken into account. But it must be taken into account that it is often impossible to choose the ideal flow meter for this kind of requirement and the maximum flow meter values must be taken into account. For example, if the minimum consumption of the stove is 0.015 m3 /h, and the maximum capacity of the boiler is 3.6 m3 /h, then you should buy a meter marked G4.
However, it is necessary to take into account the fact that the meter will be approved for installation if the deviation of the minimum value does not exceed 0.005 m3 /h. Otherwise, it may be necessary to install separate meters and, consequently, to keep two separate personal accounts.
Main types of household gas meters
When choosing a meter, be sure to consider its type, which determines the principle of its operation, as well as the accuracy of the data obtained. According to this criterion, individual consumers can choose devices:
- diaphragm instruments. These gas meters are distinguished by their low price, high reliability and quite reliable values. But they are very noisy devices;
- rotary devices. These devices are popular because of their compact size and quite low price, but they have a short service life and are not distinguished by the high accuracy of the measurements obtained;
- ultrasonic devices. These meters refer to electronic devices and have a high measurement accuracy. They are quite compact, silent and can be integrated into a common system for remote data transmission.
Also, when choosing a gas meter one must take into account the place of its installation, since these devices can be right- and left-handed. One should also take into account the section of the pipe where the installation will be done: horizontally or vertically. It is also necessary to determine the location of the gas meter: in the house, in a warm, heated room, or outdoors. In the latter case, you should buy a thermocorrected unit, as indicated by the letter “T” on the front of the device, listed next to the bandwidth of the device.
One must pay special attention to the date of issue of the meter, because it is the starting point for determining the verification interval, which is individual and ranges from 3 to 15 years.
Types of gas flow meters and basic criteria for their classification
A gas meter is a special device designed to measure fuel flow and built into the main line to the point of consumption. They can be installed both indoors, where it is possible to maintain positive temperatures at any time of the year, and outdoors, which is most typical for private homes. But in the second case, one should choose heat corrected meters, designed for operation in the temperature range from.20°C to 65°C.40 °C and up to 40 °C. Such meters have a special marking, denoted by the letter “T”.
Depending on the way of flow metering, all meters are divided into mechanical devices and electronic devices. In the first models, metering is provided by various rotating mechanisms, while in the second, consumption is determined by electronic impulses captured by special sensors. In each of these two large types of meters, there are devices that differ significantly in design and operating principle. But at the same time, regardless of the type, all gas meters consist of the following basic elements:
It is important when choosing a gas meter to know that they can also be divided into three types according to another criterion. the purpose:
- household devices, designed for installation in apartments and private houses;
- utility meters, which provide metering of consumption in apartment buildings and other communal facilities;
- industrial. The main area of application. gas utilities, various industrial enterprises, etc.д.
The main difference between the devices of different groups should be considered their capacity. For example, household meters can pump from 1.6 to 6 m3 per hour. Depending on this parameter and the characteristics of gas consumption in the house and selects the device. For a single gas stove a meter with the smallest capacity is enough, and if a boiler is installed, you need to consider its power and choose a model with the appropriate parameters.
The flow capacity of municipal water meters is 10-40 m³. and for industrial meters this parameter is equal to 40 m 3 or more, depending on the model.
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Getting ready for operation and start-up
According to the established rules, the post-installation preparation of the smart meter for start-up involves the performance of the procedure of testing the assembled unit for tightness.
This is done using standard means at home soap foam, professionally. gas leak detectors.
After checking, the device is put into operation. The recommended start-up technique is a smooth opening of the gas shut-off valve on the mowing line where the meter is installed.
It must be ensured that the working area of the smart meter is filled without a sudden increase in pressure, so as not to damage the sensitive components of the system by a pneumatic shock.
We also recommend to get acquainted with norms and rules of gas meters sealing.
Layout of a domestic gas meter
There are many models of gas meters, which vary in size, operating principle, design, purpose and other criteria.
In everyday life, most often used are diaphragm-type devices, which are also called diaphragm or chamber-type. This type of meter was invented in Britain at the end of XIX century and has been successfully used ever since.
For such devices are characterized by low cost, sufficient strength and durability. The disadvantages include a low, but still sufficient for domestic purposes flow capacity and rather large size.
3 Things Homeowners NEED to Know About Gas Meters
Such natural gas meters consist of several compartments, which are separated from each other by alternately opening flaps. In this case, each element is connected with a special cross-shaped mechanism.
Briefly, the process of functioning schematically can be presented as follows:
- Initially, gas enters the first compartment: its overflow causes the diaphragm to deform.
- The latter activates the shutters, which begin to open one by one, allowing a certain amount of gas to enter the next chamber. Immediately after the previous compartment is empty, the flap closes tightly.
- The movement of the flaps, which let in the next portion of the gaseous fuel, produces a mechanical impulse which sets in motion the crossing mechanism itself.
- Under its influence the special device “star” starts to rotate, which allows you to calculate how much gas flows through the system.
The readings of such a meter are quite accurate.