The choice of electromagnetic flow meter scale method

Abstract: the selection method of electromagnetic flow meter scale information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. Electromagnetic flowmeter is used to measure the volume flow of conducting liquid pipe, choose the premise of electromagnetic flowmeter is a medium must have adequate electrical conductivity. Standard instrument for medium conductivity not less than 10 us/cm, low conductivity type instrument it is medium conductance. More flow meter manufacturers choose model price quote you are welcome to inquire, here is a selection method of electromagnetic flow meter scale article details. Electromagnetic flowmeter is used to measure the volume flow of conducting liquid pipe, choose the premise of electromagnetic flowmeter is a medium must have adequate electrical conductivity. Standard instrument for medium conductivity of not less than 10 us/cm, lateral low conductivity type instrument it is medium conductivity is not lower than 0. 1 us/cm, low conductivity meter the flow signal transmission cable should be used dual core dual shielded cable. ( 1) Range of the transmitter range selection to improve the reliability of zui electromagnetic flow meter and the accuracy of measurement is very important. Range according to the principle of not less than zui flow quantity to determine. Traffic is commonly used by more than 50% of the measurement limit, maximum flow rate measurements set on the converter, the converter has a single range, double range, the variable range three to choose from. ( 2) Diameter selection of the calibre of the transducer can be used with the same caliber pipe, or a slightly smaller, if the conditions established in the range, the diameter can be according to the different measuring objects, the transmitter fluid velocity measurement of the pipe size to decide. In the condition of using the velocity with 2 - Zui suitable for 4 m/s. But on some occasions, its flow rate can be up to 10 m/s. , if confirmed the flow transmitter pipe diameter can be determined according to the type as medium to the lining abrasion harm or sediment easy adhesion electrode, can consider to change. When medium to the lining abrasion, can increase transmitter diameter, flow velocity under 3 m/s, and protect the flange; Easy to produce sediment adhesion electrode, can reduce the transmitter diameter, flow rate in more than 2 m/s. ( 3) Pressure selection in accordance with the requirements of industrial production, the production of electromagnetic flowmeter work pressure as follows: 1) Less than 50 mm Ф to 1. 6MPa; 2) Ф80mm - Ф 900 mm to 1. 0MPa; 3) More than 1000 mm Ф is 0. 6MPa,( 4) Using the choice of the temperature of the measured medium temperature cannot exceed lining material allowable temperature. ( 5) Lining material choosing lining should consider factors such as medium temperature, corrosion and wear. Ptfe lining is used for high temperature and strong corrosion situation, high working temperature zui of up to 190 ℃, especially suitable for acid, alkali, salt, and the side of high temperature medium, but cannot be used to produce negative pressure. Rubber lining in low temperature, corrosive fluid is not too strong, such as water, sewage, and weak acid weak base and so on, the working temperature is below 80 ℃ the wear resistance of polyurethane rubber lining vinegar good zui, especially suitable for sediment containing more serous fluid and solid liquid two phase, working temperature below 80 ℃. ( 6) The choice of electrode material select electrode material should be considered medium corrosion resistance and wear. Stainless steel: with corrosion resistance in the weak oxidizing environment, usually used in water, organic acids ( Acetic acid, lactic acid) , weak base ( Ammonia) And so on. : iron has corrosion resistance in oxidizing environment, especially can be used in the catch ion existing environment, used in seawater and grasp all kinds of compound solution ( Caught by and catch potassium) And so on. Bear: strong in strong oxidizing and reducing environment corrosion resistance, but the base class, can not use the hydrofluoric acid, fuming sulfuric acid, used in concentrated hydrochloric acid, sulfuric acid, nitric acid and aqua regia, etc. Wrong: have been excluding grasp ions in acid and alkali corrosion resistance, used in strong alkali, sulfuric acid, nitric acid, etc. Corrosion resistant heat nickel-based alloy B: in the oxidizing environment especially the hydrochloric acid and fluorine acid corrosion resistance, suitable for acid hydrochloric acid, fluorine, etc. Corrosion resistant heat nickel-based alloy C: in the moderate degree of oxidizing and reducing environment to use, suitable for all kinds of organic acid, inorganic acid and alkali. Platinum-iridium alloy: to all except aqua regia acid and alkali corrosion resistance, but the price is expensive, used for phosphate, fluoride acid, hydrochloric acid, sulfuric acid, nitric acid and alkali. Stainless steel coated with tungsten carbide: because of the tungsten carbide hardness is very high, so the wear-resisting performance is good, used in sediment more serous fluid and solid liquid two phase. Above is all there is in this article, you are welcome to inquire me manufacturer flowmeter selection, quotation, etc.

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