LDG series intelligent electromagnetic flowmeter is based on Faraday's electromagnetic induction principle and developed a fully intelligent flowmeter with international advanced level, its design incorporates long-term experience, with high reliability, stability and repeatability. It consists of two main parts: electromagnetic flow sensor and intelligent converter. The sensor includes measuring tube, electrode, liner and excitation coil, etc. The main function is to generate the induction potential which is proportional to the flow rate, and transmit the induction potential signal to the converter through cable for intelligent processing. The converter outputs analog DC signals and accumulated pulses corresponding to the measured flow rate. Widely used in petroleum, chemical, metallurgy, textile, paper, environmental protection, food and other industrial sectors and municipal management, water conservancy construction, river dredging and other areas of flow measurement.
Product Features
- Measurement results are independent of physical parameters such as flow velocity distribution, fluid pressure, temperature, density, viscosity, and so on.
- The range can be modified online on site according to the user's actual needs.
- Measurements are unaffected by changes in fluid density, viscosity, temperature, pressure and conductivity.
- There are no moving parts and no pressure loss in the measuring pipe, the requirement for a straight section is low, and there is almost no additional pressure loss in the measurement.
- Electromagnetic flow sensors are available with a grounding electrode to achieve good grounding of the instrument.
- Electromagnetic flow sensor adopts advanced processing technology, so that the meter has good resistance to negative pressure.
- Full digital quantity processing, strong anti-interference ability, reliable measurement and high accuracy.
- High-definition backlit LCD display, full Chinese character menu operation, easy to use, simple to operate, and clear readings in bright light or at night.
- With bidirectional flow, bidirectional total accumulation function, current, frequency with bidirectional output function.
Selection of electrode materials
electrode material | nicknames | Corrosion resistance |
Stainless Steel 316L | L | It is used for weakly corrosive media such as industrial water, domestic water, sewage and neutral solutions and weak acids such as carbonic acid and acetic acid. |
钛 | Ti | Resistant to corrosion by seawater, various chlorides and hypochlorites and various hydroxides. |
Hastelloy C | Hc | Resistant to oxidizing acids such as nitric acid, mixed acids, and mixtures of chromic and sulfuric acids. Also resistant to corrosion of oxidizing salts or other oxidizing agents in the environment. Good corrosion resistance to seawater, alkali solutions, and oxide solutions. |
Hastelloy B | Hb | To sulfuric acid. Phosphoric acid and other non-oxidizing acids and alkali salts have good corrosion resistance. |
钽 | Ta | It is resistant to almost all chemical media except hydrofluoric acid. Because of its high price, it is only used for hydrochloric acid and concentrated sulfuric acid. |
tungsten carbide | W | With excellent abrasion resistance, specializing in mud. Pulp and other wear-resistant media. |
Selection of lining materials
lining material | Corrosion resistance | operating temperature | Scope of Application |
Neoprene (CR) | Resistant to corrosion by general low concentration of acid and alkali salts. | 0~70℃ | Used for industrial water, sewage, low concentration of acid and alkali salt solution. Up to 95℃ on request.DN50~DN2000 optional CR lining material. |
Polyperfluoroethylene (FEP) | Good heat and corrosion resistance, high mechanical strength, good abrasion resistance, cleaning the surface without easily damaging the liner. | -20~100℃ | In addition to mortar and other highly abrasive media, all fluids, can be used for sanitary requirements like drinking water occasions, as required up to 180 ℃. DN6 ~ DN400 optional FEP lining material. |
Polytetrafluoroethylene (PTFE) | Resistant to almost all chemical media, less resistant to wear. | -40~150℃ | Cannot be used for negative pressure piping and highly abrasive fluids.DN25~DN1000 can be lined with PTFE. |
Product Parameters
Product Model | LDG Series (One-piece) |
Valve Body Material | Carbon Steel |
Lining material | CR Neoprene |
Electrode Material | SUS316 stainless steel |
Supply Voltage | AC220V/DC24V |
Nominal Pressure | ≤1.6Mpa |
Applicable Media | Water, sewage, low-concentration acid and alkali salt solutions, etc. |
Applicable Temperature | ≤70°C |
Product Size Reference
Nominal Diameter | L | H | B | b | ΦK | n-Φd | ΦD |
DN20 | 160 | 254 | 185 | 135 | 75 | 4-Φ14 | 105 |
DN25 | 160 | 254 | 185 | 135 | 85 | 4-Φ14 | 115 |
DN32 | 160 | 270 | 185 | 135 | 100 | 4-Φ18 | 140 |
DN40 | 200 | 280 | 185 | 135 | 110 | 4-Φ18 | 150 |
DN50 | 200 | 294 | 185 | 135 | 125 | 4-Φ18 | 165 |
DN65 | 200 | 313 | 185 | 135 | 145 | 8-Φ18 | 185 |
DN80 | 200 | 326 | 185 | 135 | 160 | 8-Φ18 | 200 |
DN100 | 250 | 344 | 185 | 135 | 180 | 8-Φ18 | 220 |
DN125 | 250 | 372 | 185 | 135 | 210 | 8-Φ18 | 245 |
DN150 | 300 | 403 | 185 | 135 | 240 | 8-Φ22 | 285 |
DN200 | 350 | 460 | 185 | 135 | 295 | 12-Φ22 | 340 |
DN250 | 400 | 511 | 185 | 135 | 350 | 12-Φ22 | 390 |
DN300 | 500 | 565 | 185 | 135 | 400 | 12-Φ22 | 440 |
DN350 | 500 | 620 | 185 | 135 | 460 | 16-Φ22 | 500 |
DN400 | 600 | 675 | 185 | 135 | 550 | 16-Φ22 | 565 |
DN450 | 600 | 727 | 185 | 135 | 565 | 20-Φ26 | 615 |
DN500 | 600 | 782 | 185 | 135 | 620 | 20-Φ26 | 670 |
DN600 | 600 | 782 | 185 | 135 | 725 | 20-Φ30 | 780 |
DN700 | 700 | 1068 | 185 | 135 | 840 | 24-Φ30 | 895 |
DN800 | 800 | 1157 | 185 | 135 | 950 | 24-Φ34 | 1010 |
DN900 | 900 | 1230 | 185 | 135 | 1050 | 28-Φ34 | 1110 |
DN1000 | 1000 | 1332 | 185 | 135 | 1160 | 28-Φ36 | 1230 |
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