FLDC series intelligent electromagnetic flowmeter has high accuracy and stability; It is a velocity flow meter which has been widely used in many industrial fields, including chemical industry, chemical fiber, food, papermaking, sugar-making, mining and metallurgy, water supply and drainage, ambient protection, water conservancy, steel, petrochemical, oil field. It is used for volume flow measurement of all kinds of conductive fluid medium, such as all kinds of acid, alkali, salt solutions, water coal slurry, pulp, paper pulp, pulp, corn pulp, sewage, cooling raw water, salt water, all kinds of beverage and liquor.
In the flow measurement and control of industrial processes such as petrochemical industry and chemical fertilizer, a large number of electromagnetic flowmeters are used to solve the problem of medium corrosion. However, in the production sites of these industries, the volatile gases of explosive gases and flammable liquids exist in the air, so explosion-proof electromagnetic flow juice is needed. The most commonly used explosion-proof forms are explosion-proof and intrinsically safe.
The Meaning of Explosion-proof Mark,such as:Ex、d、II C、T4 | ||
Symbol |
Mark content |
Meaning |
Ex |
Explosion proof statement |
According to Chinese National StandardsGB 3836-2010 |
d |
Explosion protection method |
Class D flameproof explosion-proof method can be installed in 1 area. |
I I C |
Gas category |
Permitted to involve class II C explosive gases |
T4 |
Temperature group |
Instrument surface temperature does not exceed 135℃ |
Methods can be selected.
1) high accuracy with 0.2%,0.5%
2) with 4-20mA output or pulse output,RS485
3) Grounding ring material: carbon steel. Stainless steel.
4) LCD dispaly,totalizer
5) power supply: 220VAC, 24VDC,or battery supply
6) explosion-proof grade: Exd II CT3-6
7) flow range can be set from 0~10m/s.
The following are more information of the selection comments:
Electrode Material |
Anti-corrosion performance and applicable condition |
Stainless steel 316L |
Applicable: 1. Domestic water, industrial water, raw water, urban sewage 2. Weakly corrosive acid, alkali, salt solution, such as nitric acid, sulfuric acid (concentration<5% at ambient temperature), boiling phosphoric acid, and sulfuric acid, seawater, acetic acid at a certain pressure(can be widely used in petrochemical, urea, Vinylon and other industries) |
HastelloyB (HB) |
Applicable: 1. Non-oxidic acid, such as hydrochloric acid(concentration <l0%) 2. Sodium hydroxide(concentration <50%), and all concentrations of ammonium hydroxide alkaline solution 3. Phosphoric acid and organic acid Not applicable: Nitric acid |
HastelloyC (HC) |
Applicable: 1. mixed acid, such as mixed solution of chromic acid and sulfuric acid 2. oxidizing salts, such as: sea water Not applicable: hydrochloricacid |
Titanium (Ti) |
Applicable: 1. Salt, such as: ①chloride(chloride/magnesium/aluminum/calcium/ammonium/iron, etc.); ②sodium salt, potassium salt, ammonium salt, hypochlorite, sea water 2. Aqueous Slkali, such as potassium hydroxide, ammonium hydroxide and strontium hydroxide solution with concentration <50%. Not applicable: hydrochloric acid, sulfuric acid, phosphoric acid, hydrofluoric acid and other reducing acids. |
Tantalunm (Ta) |
Applicable:1. hydrochloric acid(concentration <40%), dilute sulfuric acid and concentrated sulfuric acid (excluding fuming sulfuricacid)2. Chlorine dioxide, ferric chloride, hypochlorous acid, sodium cyanide, lead acetate, etc.3. An oxidizing acid such as nitric acid (including fuming nitric acid) and aqua regia with a temperature below 80℃Not applicable: alkali, hydrofluoric acid |
Platinum (Pt) |
Applicable: Aimost all acid, alkali, salt solutions (including fuming sulfuric acid, fuming nitric acid)Not applicable: aqua regia, ammonium salt | |
Tungsten carbide (WC)| |
Applicable: Pulp, sewage, can resist solid particle interference Not applicable; inorganic acids, organic acids, chlorides |
Lining Material |
Abbreviation |
Performance |
Highest operating temperature |
Applicable medium |
Applicable caliber |
Neoprene |
CR |
Medium abrasion resistance, corrosion resistance to generallow concentration acid and alkali salt solutions |
0-+65℃ |
Tap water, industrial water,sea water |
DN6-2200 |
Polyurethane |
PU |
Excellent wear resistance and poor resistance of acid and alkali |
0-+65℃ |
Pulp, ore pulp and other mineral fluids |
DN25-500 |
PTFE |
F4 (PTFE) |
Stable chemical properties, corrosion resistance to boiling hydrochloric acid, sulfuric acid, aqua regia, concentrated alkali |
-25-+140℃ |
Corrosive acid, alkali, salt solution |
DN10-600 |
Polytetrafluor oethylene-propylene Teflon (FEP) |
F46 (FEP) |
The chemical properties are equivalent to F4, and the compression and tesile strength are better than F4 |
-25-+120℃ |
Corrosive acid, alkali, salt solution |
DN6-200 |
Soluble polytetrafluo-roethylene |
PFA |
The chemical properties are equivalent to F46, and the compression and tensile strength are better than F46 |
0-+180℃ |
Corrosive acid, alkali, salt solution |
Needed to be customized |
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