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LEVSEN Rotameters are useful for measuring the flow of Water , Air, Common Gases, Alkelies, Oil, Organic Chemicals etc. When fluid or gas flows through a taper tube containing a float, a pressure difference of P1 and P2 is created between upper and lower side of the float. The float moves upwards by a force obtained by multiplying the pressure differential by the maximum cross sectional area of the float. Due to taper tube, as the float moves upwards, the fluid passing area increases as a result of which the differential pressure decreases. Upward movement of float stops when the dead load is dynamically balanced by the differential pressure. Tapering of metering tube is so designed that the vertical movement of the float becomes linearly proportional to the rate of flow and the scale is provided to read the position of the float, thus giving birth to flow rate indication. Based on Bemoulli's theorem, the principle mentioned above can be theoretically expressed as follows.

FLOW FORMULA

• Q = Volumetric flow rate
• V = Volume of Float
• C = Flow coefficient
• Af = Maximum pressure receiving area of float.
• A = Fluid passing Area
• P = Float Density
• g = gravimetric acceleration
• y = Fluid Density

LEVSEN CONTROLS & EMGINEERING provides various types of Rotameters / flow meters available namely :

GLASS TUBE ROTAMETER SERIES GTR 100

LEVSEN make high accuracy fully enclosed online direct reading glass tube rotameters are relatively simple and reliable instruments for continuous flow rate indication. This rotameters consists of a vertical mounted, calibrated tapered tube with float inside and a scale directly calibrated as per flow range taking into account operating Sp. Gr. /Density and operating viscosity. Line fluid raises the float in tapered glass Tube, Area increases as float moves upward thereby showing the exact (Increasing) flow.

SPECIFICATIONS

METER BODY: M.S. POWDER COATED / SS 304
FLOAT: SS 316 / PTFE / PVC/ Monel
WETTED PART: SS 316 /SS 304 / M.S./PTFE/PVC/P.P./Monel
PACKING: Neoprene / PTFE/ Silicon
TUBE: Borosilicate Glass
SCALE: SS304/Aluminum
CONNECTION: Flanged / Threaded
OPERATING TEMPERATURE: 200°C ( Max.)
ACCURACY : ±2% of full scale
RANGE ABILITY: 10:1
REPEATABILITY: 0.5%

Application

Flow Measurement of liquid like Water, Oil, Alkalies, Organic Chemicals etc., Air and Common Gases.

ACRYLIC BODY ROTAMETER SERIES ABR 200

LEVSEN make high accuracy, clear acrylic body rotameter uses tapered tube drilled directly in acrylic plastic body itself, acrylic plastic is highly stabled, chemical resistant and gives glass like clearness which enables clear visualization of flow. In Acrylic Body rotameter, Flow range is calibrated, engraved and colored body itself for long lasting durability. Acrylic body rotameters are generally used for Air, Water and Gases.

SPECIFICATIONS
METER BODY: ACRYLIC
FLOAT: SS 316 / PTFE / PVC
WETTED PART: SS /PTFE/PVC/P.P
O-RINGS: Neoprene / PTFE/ Silicon
SCALE: Engraved on Body
CONNECTION: Flanged / Threaded
OPERATING TEMPERATURE: 70°C (Max.)
ACCURACY : ±3% of full scale
RANGE ABILITY: 10:1
REPEATABILITY: 0.5%

Application

Flow Measurement of Liquid like Water, Oil, Alkalies, Organic Chemicals etc., Air and Common Gases.

METAL TUBE ROTAMETER SERIES MTR-300

LEVSEN Metal Tube Variable Area Flow Meters (Rotameters) are intended for application where high pressure, temperature OR corrosive conditions preclude the use of conventional glass tube. These are all Metal Variable Area type Flowmeter design to measure flow rate of liquids, gases & steam under critical conditions. It consists of a tapered metal tube, an indicating assembly and a float. A magnet encapsuled in float couples with rotating magnets connected to an indicating pointer, thus the movement of the float, is accurately indicated in terms of flowrate.