Float Level Gauge

Float Level Gauge

Floating ball Magnetic Level Gauge

Float Cage Material: PTFE, PP, PVC, PVDF
Max. Centre to Centre Distance: 6000 mm, greater lengths on request
Connecting Flanges: According to DIN or ANSI B16.5
Rated Pressure: <10.0 Mpa for SS & 0.3 Mpa for PP, PVC & PVDF(Higher pressure rating can also be provided)
Temperature of Liquid: 450ºC (Max.) for SS, 80ºC (Max.) for PVDF,60ºC (Max.) for PVC, 50ºC (Max.) for PP
Specific Gravity: Min. 0.40g/cm³
Signal: 4～20mA.DC、4～20mA.DC+Hart、pulse、RS485
Switch type: NO、NC、SPDT
Explosion-proof mark: Exd II BT6
Protection Grade: IP65/IP67

Float Level Gauge provides clear, high clarity indication of liquid level. Magnetic Level Gauges are principally designed as an alternative to glass level gauges XU KANG offers Magnetic Level Gauges in top-bottom, top and side mounted construction with two types of indicator system i.e. Capsule and Bi-colour Rollers. Magnetic Level Gauge is consists of three major components: Float Chamber, Float and Indicator System.
Magnetic Level Gauge operates on the principle of magnetic field coupling to provide fluid level information. Float chamber is typically constructed with non magnetic pipe having process connections that matches to the vessel connections. Float size and weight is determined by the process fluid, pressure, temperature and the specific gravity of the process fluid. Float contains magnets to provide 360o magnetic flux field.

1. Basic model:
Suitable for level measurement of liquid medium which working pressure less than 4.0MPa, and working temperature lower than 200℃.
2. Anti-corrosion model:
It’s suitable for acid, alkali and many organic solvents. It use PTFE lined stainless steel, PPR, PVC as body material.
3. Jacketed model:
Applied to antifreeze, insulation and heating level measurement occasions. Jacket type: steam jacket, water cycle jacket, vacuum jacket, electric heating jacket, and electric warming jacket.
4. High temperature high pressure model:
It’s suitable for high temperature and high pressure level measurement occasions. The maximum process temperature is 520℃. The maximum working pressure is 32MPa.

Feature and Application:
1. Highly visible level indication with no process fluid in contact with the glass.
2. All construction by code certified welders.
3. Float designed and weighted for maximum accuracy with 75 grams minimum upward buoyant force.
4. Transmitter and switch options which can be installed, adjusted and maintained with no process interruption.
5. Safe for corrosive, flammable, toxic, high-temperature and high-pressure applications.
6. Rugged design – low or no maintenance.
7. IP68 approved local indication.

Float Cage Material	SS304, SS316, PTFE, PP, PVC, PVDF
Max. Centre to Centre  Distance	6000 mm, greater lengths on request
Connecting Flanges	According to DIN or ANSI B16.5
Rated Pressure	<10.0 Mpa for SS & 0.3 Mpa for PP, PVC & PVDF Higher pressure rating can also be provided
Temperature of Liquid	450ºC (Max.) for SS, 80ºC (Max.) for PVDF 60ºC (Max.) for PVC, 50ºC (Max.) for PP
Specific Gravity	Min. 0.40g/cm³
Scale	Graduated in cm, Aluminium or SS304
Signal	4～20mA.DC、pulse、RS485
Switch type	NO、NC、SPDT
Measuring Accuracy	+/- 5 mm
Explosion-proof mark	Exd II BT6
Protection Grade	IP65/IP67

Applications of Magnetic Flap Level Gauges in Chemical & Metallurgical Industries

I. Chemical Industry

1. Storage Tank Area (Crude Chemical Raw Materials)

• Various vertical/horizontal storage tanks for acid, alkali, solvent, alcohol, ester, light oil, liquid ammonia and refrigerant.
• Medium features: corrosive, volatile, flammable, toxic.
• Matching advantages: fully sealed structure, no medium leakage; PTFE lining / 316L / Hastelloy float optional for anti-corrosion; can equip explosion-proof 4–20mA transmitters for remote DCS monitoring, suitable for Class I dangerous chemical zones.
• Installation type: side-mounted for conventional tanks; top-mounted for buried tanks, tanks without side openings or high-viscosity easy-crystallization media.

2. Reaction Kettles & Synthesis Vessels

• Mixing reactors, neutralization tanks, crystallization tanks, distillation stills, extraction separators.
• Working conditions: medium temperature alternation, stirring foaming, easy scaling or crystallization.
• Advantages: magnetic coupling no direct contact with process medium; no leakage points; optional anti-blocking floats to reduce medium adhesion; visible two-color magnetic turning flips, clear liquid-gas boundary on site.

3. Auxiliary Equipment for Chemical Production

Deaerators, heat transfer oil expansion tanks, wastewater sedimentation tanks, intermediate buffer tanks, filter tanks, recovery condensate tanks.

• For sewage and turbid waste liquid: magnetic flap avoids the defect that glass level gauges are easy to fog and scale.
• High-temperature thermal oil system: high-temperature resistant floats adapt to long-term high heat working conditions.

4. Fine Chemical & Pharmaceutical Sanitary Production

Polished sanitary magnetic level gauges applied to fermentation tanks, liquid preparation tanks, sterile storage tanks. No internal dead corners, easy CIP online cleaning, meets hygiene standards.

II. Metallurgical Industry

1. Circulating Cooling Water System (Core Application)

Cooling water pools, cooling tower buffer tanks, circulating water tanks, high-pressure water storage tanks for blast furnace, converter and continuous casting equipment.

• Working characteristics: large water volume, contains iron oxide slag, dust impurities, slight vibration on site.
• Advantages: sturdy metal main body, strong anti-vibration performance; not easy to be blocked by tiny slag compared with glass plate gauges; stable long-term outdoor operation.

2. Waste Heat Recovery & Steam Auxiliary Equipment

Waste heat boiler drums, deaerators, condensed water recovery tanks, hot water tanks for smelting furnaces.

• Replace traditional glass level gauges to avoid frequent glass cracking caused by furnace vibration; matched with remote signal output to realize central control room monitoring of boiler water level.

3. Pickling & Surface Treatment Workshop

Pickling tanks, rinsing tanks, acid-base storage barrels for steel plate surface treatment.

• Strong acid and alkali corrosive environment: use PP/PTFE lined magnetic flip level gauges, effectively resist corrosion of hydrochloric acid, sulfuric acid, lye.

4. Hydraulic & Lubricating Oil Station

Hydraulic fuel tanks, gear oil storage tanks, thin oil lubrication stations of rolling mills and blast furnace equipment.

• Monitor oil reserve to prevent equipment dry friction; anti-oil-adhesion floats ensure accurate liquid level display for long-term use.

5. Dust Removal & Environmental Protection Equipment

Desulfurization absorption towers, wastewater sedimentation tanks in metallurgical flue gas treatment. Adapt to turbid media with dust and suspended solids, no visual blur problem.

III. Key Difference in Application Between Two Industries

1. Medium Characteristics

• Chemical: dominated by corrosive, flammable, toxic, crystallizable, high-viscosity chemical liquids; anti-corrosion and explosion-proof are the core demands.
• Metallurgy: mostly cooling water, hot steam, lubricating oil, pickling liquid mixed with metal dust; anti-vibration, anti-slag-blocking and impact resistance are primary requirements.

2. Main Matching Configurations

• Chemical: lined anti-corrosion floats, explosion-proof transmitters, top-mounted type for crystallized media, sanitary polished type for fine chemicals.
• Metallurgy: carbon steel ordinary magnetic flap, anti-vibration reinforced support, high-temperature resistant floats for waste heat boilers, no complicated explosion-proof configuration in most cooling water areas.

3. Working Environment

• Chemical plants: closed workshop, strict explosion protection requirements, medium easy to leak and volatilize.
• Metallurgical workshops: open and semi-open, high dust, large mechanical vibration, alternating cold and hot environment.

Short Brochure Summary

Magnetic flap level gauges adopt non-contact magnetic coupling sealing structure. In the chemical industry, anti-corrosion and explosion-proof models are widely used for various chemical storage tanks, reaction kettles and dangerous medium vessels. In the metallurgical industry, vibration-resistant and anti-blocking types serve cooling water circulation systems, waste heat boilers, pickling tanks and lubricating oil stations, realizing on-site visual display and remote liquid level signal transmission for both industries.

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