City gas air flow meter scale selection

Abstract: the selection of city gas air flow meter scale information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. Abstract: the city gas of several common air flow meter, such as volume type air flow meter, speed meter, orifice flow meter and ultrasonic characteristics of total air flowmeter, and to choose according to technical performance parameters of different types of fuel gas user flow. More flow meter manufacturers choose model price quote you are welcome to inquire, here is the article details in the selection of city gas air flow meter scale. City gas of several common air flow meter, such as volume type air flow meter, speed meter, orifice flow meter and ultrasonic characteristics of total air flowmeter, and to choose according to technical performance parameters of different types of fuel gas user flowmeter are introduced. 1. The introduction of gas as a kind of circulation of commodities, its activity is based on measuring instrument measuring the value of the settlement. Choose the appropriate measurement instrument. Ensure the accuracy of measurement, it is necessary for a fair deal, this is very important for users and gas companies. 2. Commonly used types and characteristics of city gas flowmeter city gas flowmeter are: air volumetric flowmeter ( Diaphragm gas meter, waist wheel flow meter) , speed meter ( Turbine meter, vortex precession flowmeter, vortex flowmeter) , differential pressure flowmeter ( To change the orifice meter) And air ultrasonic flowmeter. The characteristics of various types of flowmeter is as follows: (1) high volumetric flowmeter metering accuracy, but compared with other types of flowmeter, the volume is larger, straight pipe before and after the flow meter with no requirement. Among them: diaphragm gas meter range than wide, initiating the flow is small, light quality, low prices, production, installation, maintenance is convenient, small pressure loss, compared with other flowmeter in the same flow range of volume is larger, often used to use low pressure and flow of big zui changes in small and medium-sized gas flow metering. Waist wheel flow meter compared with diaphragm gas meter, small volume, large flow, the flow meter must be installed before the filter. Mainly suitable for medium and low pressure medium and small flow gas measurement. (2) the speed type flow meter tong compact structure, high measuring accuracy, straight pipe before and after the meter has requirements. Among them: small pressure loss of the turbine flowmeter, bearing should have good wear resistance. Precession vortex flowmeter has no mechanical moving parts, corrosion resistance, long service life, loss of pressure is bigger, suitable for medium and high pressure gas flow measurement. Vortex street flowmeter has no mechanical moving parts, commonly used in large, medium flow gas metering. (3) can change the orifice meter belongs to the differential pressure flowmeter, simple structure, long service life, but a range is narrow, straight pipe before and after the meter has requirements, generally used in flow change much, high pressure large flow metering. (4) air generated by ultrasound, ultrasonic flowmeter downstream and upstream of the ultrasonic pulse propagation time difference to measure the flow. This meter high measuring accuracy, good repeatability, no pressure loss, range than wide, can realize two-way flow metering, suitable for medium and high pressure flow place and two-way measurement sites. Diaphragm gas meter, waist wheel flow meter and speed meter is zui commonly used city gas air flow meter. , compared to the three little traffic, the diaphragm gas meter zui low price, high speed meter price zui; But with the increase of flow rate, the trend abate, flat, and the trend began to emerge. The volume of the three is gradually reduced. Compared to the same type imported flowmeter and domestic flow meter: range wide, high accuracy, such as the Netherlands ISM company production of turbine table 0. 2 qmax≤ Q≤ Qmax, accuracy higher than 0. 5%, but imports meter price is much higher. Three different types of fuel gas user flow, selection of meter gas flowmeter is mainly from the following several aspects: (1) whether the measured medium, working pressure and environmental conditions and the selected meter match. (2) gas with the nun zui, zui small gas is in the range of the flow measurement precision. (3) the price of the flowmeter performance than whether zui. (4) flow meter is easy to install, repair and maintenance and management, etc. Mainly from the aspects of the selection of technical performance parameters under the selection of different types of fuel gas user flow meter is introduced briefly. 3. 1 flow children's small, but large variations in flow children's residents users and public buildings. 3. 1. 1 residents of gas supply for user network user number is much, use of low pressure, flow range is small, generally choose zui large flow 2. 5 m3 / h or 4. 0 m3 / h of diaphragm gas meter for measuring B level. These two kinds of diaphragm gas meter zui small flow respectively 0. 16 m3 / h and 0. 025 m31h, initiating the flow are only a few dm3 / h, for the people often use small fire to cook and wash bath of users, it is very appropriate. According to GB/T6968 - The provisions of the 1997 'diaphragm gas meter' B diaphragm gas meter basic error such as table 1. When choosing skin membrane table, should choose as far as possible the user use the traffic at 0. 1 Qmax Qm。 Between the specifications of the flowmeter. Most residents users use the burner for a eyes stove and a water heater, according to GB/T16410 - Regulation: 1996 eyes oven rated heat load should be less than. 0. 46个千瓦。 Sold on the market at present rated eyes of gas stove, the heat load of 7 - 9 kw to H = 37. 68 mj/Nm3 gas meter, a eyes focal hour rated zero gas consumption. 67 - 0. 86 Nm3 / h。 Triumphant 61 water heater brand, for example: 34 mj/h rated heat load, the rated zero gas consumption. 91 nm3 / h, according to the above terms, such as the user's nominal gas consumption is less than 2. 5 m3 / h, can choose zui 2 big flow. 5 m gung diaphragm gas meter. In practical use, the user will be water heaters and kitchen is provided at the same time use and open to rarely zui big flow.

Many of us have heard about mass flow meter and seen some of these units in operation in digital fork density meter, vortex flow meter manufacturer and insertion ultrasonic flow meter spaces.

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