How to choose the electromagnetic flowmeter?

2019-11-01 13:41:21 凯崎 20

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  • Confirm the norminal Size, means the outside pipe diameter;

  • Choose the suitable Liner of magnetic flow meter based on the chemical property of liquid;

  • Choose the suitable electrode material, basically we use 316L;

  • Confirm the environment and project conditions to make sure the temp and pressure is below the limit value;

  • Choose connection method, thread or Flange(PN, JIS,ANSI);

  • Choose output(4-20mA,pulse,OCT,frequency) and communication mode(MODBUS,HART);

  • Choose the housing type(Integrate,split) and Power supply(AC,DC,BATTERY);

  • Get catalog and documentation from us.


                      How TO Choose The Lining Material 
Lining MaterialMain PerformanceApplications
Teflon 

1.The most steady material in plastics which is resistable to boiling hydrochloric acid,vitriol aqua fortis as well as strong alkali and organic solvent.  

2.Not be perfect in abrasion resistance.

 Strong corrosive mediums such as strong acid and alkali.
PFA  Having the same abrasion resistance with PTFE.Having strong ability of load pressure resistance.  Applicable in state of load pressure.
F46  1.Have the same abrasion resistance with PTFE.2.Resistable for low abrasion.3.Having strong resistance to load pressure.1.The same as PTFE.   2.Applicable in mediums of low abrasion.
Neoprene  1.Be of good elasticity,retractility and abrasion resistance.2.Be resistant to low aicd,alkali and salt but not for oxidation mediums.1.The same as   PTFE. 2.Applicable in mediums of low abrasion.
Polyurethane  1.Be of good abrasion resistibility.2.Not be perfect in acid/alkali resisitance.3.Can't be used for water mixed with organic solvent. Applicable in mineral serosity,slurry and coal slurry of high abrasion.
        How TO Choose The Electrode Material 
  Electrode Material                                                                   Applications
 Stainless steel (SUS316)   Applicable in water,sewage and corrosive mediums.Widely used in industries of petrol,chemistry,carbamide,etc
Stainless steel covered with tungsten carbide         Applicable in mediums of no corrosive and low abrasion.
Hastelloy B(HB)   Having strong resistance to hydrochloric acid of any consistance which is below bioling piont.Also resistable against vitriol,phosphate,hydrofluoric acid,organic acid etc which are oxidable acid,alkali and non-oxidable salt.
Hastelloy C(HC)   Be resistant to oxidable acid such as nitric acid,mixed acid as well as oxidable salt such as Fe+++,Cu++and sea water
  Titanium   Applicable in seawater,and kinds of chloride,hypochlorite salt,oxidable acid(including fuming nitric acid),organic acid,alkali etc.Not resistant to a pure reducing acid(such as sulphuric acid,hydrochloric acid)corrosion.But if acid contains antioxidant(such as Fe+++,Cu++)is greatly reduce corrosion.
 Tantalum   Having strong resistance to corrosive mediums that is similar with glass.Almost applicable in all chemical mediums.Except for hydrofluoric acid,oleum and alkali.  
 Platinum-iridium   Almost be applicable in all chemical mediums except for aqua fortis,ammonium salt.


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