Rubber Liner SS316L Electrode Electromagnetic Flow Meter

  • Lining materials: polyurethane rubber, high-temperature rubber, acid-resistant rubber, neoprene, PTFE, F46, PFA.
  • Electrode materials: molybdenum-containing stainless steel, Hastelloy B, Hastelloy C, titanium, tantalum, platinum-iridium alloy
  • Velocity measurement range: (0 ~ 15) m/s
  • Matching accuracy grade: 0.5% or 0.2 %
  • Measurement parameters: instantaneous flow, velocity, positive and negative cumulative total
  • Network functions: HART, Modbus, GPRS, PROFIBUS (optional).
  • Power supply: 24VDC or 220VAC or Build-in Battery
Enquiry

Electromagnetic flow meter is a speed instrument for measuring the volume flow of conductive medium. It outputs standard current signals for recording, adjustment and control while monitoring and displaying on the spot, so as to realize automatic control of detection and remote transmission of signals.

The electromagnetic flow meter comprises of interconnected transmitters and sensors that collaborate to accurately measure fluid flow. The sensor, designed with a direct connection, quantifies the induced voltage generated by the fluid as it traverses through the pipe. Subsequently, the transmitter gauges this voltage and converts it into a precise flow rate before transmitting the measurement data to the control system.

magnetic flow meter

The flow principle behind electromagnetic flow meters is called Faraday’s Law, and its mathematical expression is defined as E=k*B*D*V. The induced voltage (E) is proportional to the speed (V) of the fluid passing through the magnetic field (B). The induced voltage enters the transmitter through the electrode loop. A transmitter then converts this voltage into a quantifiable flow speed. The volumetric flow rate of the fluid is calculated using this known velocity combined with the area of the pipe.

Electromagnetic flow meters are highly suitable for a diverse range of applications across various industries, including pulp and paper, metallurgy and mining, water and wastewater treatment, food and beverages, chemicals and petrochemicals, as well as oil and gas. Due to their streamlined design without any protrusions or obstructions in the pipeline, electromagnetic flow meters can be seamlessly adapted for an extensive array of applications encompassing clean liquids, slurry, as well as highly corrosive or abrasive fluids.

 

Selection of Liner Materials for Electromagnetic Flow meters

The lining material should be selected according to the corrosiveness, abrasion and temperature of the measured medium.

MaterialMain performanceArea of application
Polyurethane rubber1. Good wear resistance

2. Poor acid and alkaline resistance

<45℃

Measuring neutral strong wear of coal slurry,

Mud and pulp

High temperature rubber1. It has good elasticity and wear resistance.

2. Resistant to general weak acids and weak bases.

-70℃~+200℃

Measuring water and sewage

Acid-resistant rubber

(hard rubber)

1. Resistant to the corrosion of hydrochloride acid, acetic acid, oxalic acid, ammonia water, phosphoric acid and 50% sulfuric acid and sodium hydroxide (potassium) at room temperature.

2. Not resistant to strong oxidant corrosion

-25℃~+90℃

Determination of common acid, alkali and salt solutions

Chloroprene rubber1. Good elasticity and wear resistance

2. Resistant to the corrosion of ordinary low-concentration acid, alkali and salt solutions, but not resistant to the corrosion of oxidizing media.

<80℃

Measuring water, sewage, mud and pulp

Fluorine

mould

material

PTFE

(F-4)

1. Boiling-resistant hydrochloric acid, sulfuric acid, nitric acid, aqua regia, concentrated alkali and various organic solvents.

2. Strong wear resistance and poor adhesion.

-40℃~+170℃

Strong corrosive solution of concentrated acid and concentrated alkali

Liquid and sanitary medium

F-46

(FEP)

1. Media that are not resistant to PTFE

2. Not resistant to fuming nitric acid and butyl lithium

-40℃~+170℃

Can be use for higher negative pressure.

PFAChemical corrosion resistance is similar to FEP.-40℃~+170℃

Same as FEP, can be used for higher negative pressure.

Selection of Electrode Materials for Electromagnetic Flow meters

Corrosion resistance of electrode materials (for reference only)

materialCorrosion resistance
Molybdenum stainless steelApplication: domestic/industrial water, sewage, weak acid-base salt solution, concentrated nitric acid at room temperature.

Not applicable: hydrofluoric acid, hydrochloric acid, chlorine, bromine, iodine and other media.

Hastelloy BApplication: A certain concentration of hydrochloric acid, hydrofluoric acid and other non-oxidizing acids and non-oxidizing hydrochloric acid, alkali solution such as sodium hydroxide with a concentration of not less than 70%.

Not applicable: oxidizing acids such as nitric acid.

Hartmann CApplication: Corrosion of oxidizing acid, such as mixed medium of nitric acid, mixed acid or sulfuric acid; It is also resistant to environmental corrosion caused by oxidizing salts or other oxidants. Such as hypochlorite solution higher than normal temperature; Very good corrosion resistance to seawater.

Not applicable: reducing acids and chlorides such as hydrochloric acid.

Titanium TiApplication: chloride, hypochlorite, seawater, oxidizing acid.

Not applicable: reducing acids such as hydrochloric acid and sulfuric acid.

TanTalum TaApplication: concentrated hydrochloric acid, nitric acid, sulfuric acid and most other acid solutions, including boiling hydrochloric acid, nitric acid and sulfuric acid below 175℃. Not applicable: alkali, hydrofluoric acid, fuming sulfuric acid
Platinum-Iridium alloyAll kinds of acids, bases and salts, excluding aqua regia.

 

 

 

Features

★ There are no moving parts in the measuring tube, which is convenient for maintenance and management; No flow parts, no pressure loss.
★ The minimum conductivity of the liquid to be measured is ≥20μs/cm. With various lining materials, it can be used to measure the flow of various acid, alkali and salt solutions and media such as mud, pulp and paper pulp.
★ The measurement accuracy is not affected by the change of fluid density, viscosity, temperature, pressure and conductivity, and the voltage signal induced by the sensor has a linear relationship with the average flow rate, so the measurement accuracy is high.
★ Low-frequency rectangular wave excitation is not affected by power frequency and various interference on site, and the work is stable and reliable.
★ It is not affected by the direction of fluid, and can be accurately measured in both positive and negative directions.
★ LCD backlight display, online parameter modification, simple and convenient operation.
★ Display mode in Chinese and English (optional).
★ The total amount of forward, reverse and difference can be recorded.
★ It has the functions of empty pipe measurement and alarm, and can adapt to different fluid media.

Specification

SizeDN3-DN3000mm
Nominal Pressure0.6-1.6MPa (2.5MPa/4.0MPa/6.4MPa…Max 42MPa – optional)
Accuracy+/-0.5%(Standard)
or +/-0.2%(Optional)
LinerPTFE, Neoprene, Hard Rubber, EPDM, FEP, Polyurethane, PFA
ElectrodeSUS316L, Hastelloy B, Hastelloy C
Titanium, Tantalum, Platinium-iridium
Structure TypeIntegral type, remote type, submersible type, Insertion type
Medium Temperature-20~+60 degC(Integral type)
Remote type(Neoprene,Hard Rubber,Polyurethane,EPDM) -10~+80degC
Remote type(PTFE/PFA/FEP) -10~+160degC
Ambient Temperature-20~+60deg C
Ambient Humidity5-100%RH(relative humidity)
Measuring RangeMax 15m/s
Conductivity>5us/cm
Protection ClassIP65(Standard); IP68(Optional for remote type)
Process ConnectionFlange (Standard), Wafer, Thread, Tri-clamp etc (Optional)
Output Signal4-20mA/Pulse
CommunicationRS485(Standard), HART(Optional),GPRS/GSM (Optional)
Power SupplyAC220V (can be used for AC85-250V)
DC24V (can be used for DC20-36V)
DC12V (optional), Battery Powered 3.6V (optional)
Power Consumption<20W
AlarmUpper Limit Alarm / Lower Limit Alarm
Self-diagnosisEmpty Pipe Alarm, Exciting Alarm
Explosion ProofATEX

Flange Electromagnetic Flow Meter Installation Requirement

In order to obtain a stable and accurate flow measurement, it is very important that the flow meter is installed correctly in the pipe system.
Do not install the meter near equipment that produces electrical interference such as electric motors, transformers, variable frequency, power cables etc.
Avoid locations with pipe vibrations for example pumps.
Do not install the meter close to pipeline valves, fittings or impediments which can cause flow disturbances.
Place the meter where there is enough access for installation and maintenance tasks.

flow meter installation