Industry Sewage Electromagnetic Flowmeter

6 month ago

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Jiangsu Leitai Automation Instrument Co., Ltd.

 6 month year

Product details

Electromagnetic flowmeter is a flowmeter that measures flow based on Faraday's law of electromagnetic induction. The advantages of electromagnetic flowmeter are small pressure loss and large measurable flow range. The ratio of the maximum flow rate to the minimum flow rate is generally more than 20:1. It uses a wide range of industrial pipe diameters and can measure pipe diameters in the range of DN10~DN2000. The output signal is linear with the measured flow rate. It has high accuracy and can measure conductivity. Fluid flow rate of ≥5μs/cm for acids, alkalis, salt solutions, water, sewage, corrosive liquids, mud, mineral pulp, paper pulp, etc. It is widely used in flow meter measurement in chemical industry, metallurgy, textile, papermaking, environmental protection, food, domestic sewage, industrial sewage, cooling water, water plants and other industrial sectors, as well as in municipal management, water conservancy construction, river dredging, building water supply measurement and other fields.

Product features

1. The conversion display adopts 16-bit high-performance microprocessor and 2×16LCD display, which makes parameter setting easy and programming reliable.

2. Bidirectional measurement system, equipped with three totalizers that can respectively display: forward flow, reverse flow and the total amount of the difference between forward and reverse flow.

3. The conversion display has a variety of outputs: current, pulse, digital communication, HART, 485 communication protocol.

4. Suitable for large diameter pipes, DN300-1400mm.

5. The sensor body and electrodes are available in a variety of materials.

6. Small size, light weight, easy to transport and install, and can realize continuous maintenance, disassembly and assembly.

Lining selection table

Lining material	Main performance	Maximum medium temperature		Scope of application
Lining material	Main performance	Integrated type	Separate type
Polytetrafluoroethylene (F4)	It is a kind of plastic with very stable chemical properties. It can withstand boiling hydrochloric acid, sulfuric acid, nitric acid and aqua regia, as well as concentrated alkali and various organic solvents. Not resistant to corrosion by chlorine trifluoride, high-temperature chlorine trifluoride, high-flow liquid fluorine, liquid oxygen, and auto-oxidation.	70℃	100℃ 250℃ (Special order required)	1. Strongly corrosive media such as concentrated acid and alkali. 2. Sanitary media.
Polyperfluoroethylene-propylene (F46)	Same as F4, but its wear resistance and negative pressure resistance are higher than F4.		Same as above
Polyfluoroethylene (Fs)	The upper limit of applicable temperature is lower than that of polytetrafluoroethylene, but the cost is also lower.		80℃
Polychloroprene	1. It has excellent elasticity, high tearing force and good wear resistance. 2. Resistant to the corrosion of general low-concentration acid, alkali and salt media, but not resistant to the corrosion of oxidizing media.		80℃ 120℃ (Special order required)	Water, sewage, weakly abrasive mud or slurry.
polyurethane rubber	Extremely wear-resistant.		80℃	Neutral strong abrasion slurry, coal slurry, mud

Electrode selection table

Electrode material	Corrosion resistance and wear resistance
Stainless steel 0Crl8Nil2M02Ti	It is used for weakly corrosive media such as industrial water, domestic water, and sewage. It is suitable for industrial sectors such as petroleum, chemicals, and steel, as well as municipal and environmental protection fields.
Hastelloy B	It has good corrosion resistance to hydrochloric acid of all concentrations below the boiling point, and is also resistant to corrosion by sulfuric acid, phosphoric acid, hydrofluoric acid, organic acids and other non-chlorinating acids and alkalis, and non-oxidizing salt liquids.
Hastelloy C	It is resistant to corrosion by non-oxidizing acids, such as nitric acid, mixed acid, or mixed media of chromic acid and sulfuric acid, and is also resistant to corrosion by oxidizing salts such as Fc+, Cu+ or other oxidizing agents, such as hypochlorite above normal temperature. Corrosion from solutions and seawater
Titanium	It can withstand corrosion from seawater, various chlorides and hypochlorites, oxidizing acids (including oleum), organic acids and alkali. It is not resistant to corrosion by relatively pure reducing acids (such as sulfuric acid, hydrochloric acid), but if the acid contains oxidants (such as nitric acid, Fc+, Cu+), the corrosion is greatly reduced.
Tantalum	It has excellent corrosion resistance and is very similar to glass. In addition to hydrofluoric acid, fuming sulfuric acid, and alkali, it is almost resistant to corrosion by chemical media (including boiling hydrochloric acid, nitric acid, and sulfuric acid below 50°C). Resistant to alkali; resistant to corrosion.
Platinum/titanium alloy	It is resistant to almost all chemical media, but is not suitable for aqua regia and ammonium salts.
Stainless steel coated tungsten carbide	For non-corrosive, highly abrasive media.
Note: Since there are many types of media and their corrosiveness is affected by complex factors such as temperature, concentration, flow rate, etc., this table is for reference only. Users should make their own choices based on the actual situation. If necessary, they should conduct corrosion resistance tests on the selected materials, such as coupon tests.

Installation Precautions

1. It should be installed at the lower part and the vertical upward part of the horizontal pipeline, and avoid installing at the highest point and the vertical downward part of the pipeline as shown in Figure 1;

2. It should be installed at the rising point of the pipeline;

3. When installing in an open discharge pipe, it should be installed at the lower part of the pipe;

4. If the pipe drop exceeds 5m, install an exhaust valve downstream of the sensor;

5. The sensor must not be installed at the inlet and outlet of the pump, but should be installed at the outlet of the pump.