Variable Area Flowmeter
Rotemeter
Variable Area Flow meter

Variable Area Flow Meter Rotameter for Liquid and Gas

Robust all-metal structure design.

Suitable for gas and liquid measurement in various of industry.

Cone-shape measuring tube design, which has wide measuring range and good linearity.

Wetted parts material is optional:SS304 SS316L,FEP, Hastelloy C.

For the digital LCD display type, the flow range of the instantaneous flow can be corrected on-site based on the different measuring medium.

Advanced six-level data backup technology is adopted to save the total flow data automatically when power is cut off (Total flow rate sending cycle is 0.3 seconds).

 

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Description

LZ Series Variable-area flow meter with metallic measuring Tube has the characteristics of simple construct, work reliable, high precision and convenient installing. Compared with the Variable-area Flow-meter with Glass Tube, this series has the characteristics of high-pressure proof, high-temperature proof safety, ocular reading, etc. It can be suitable to measure the opaque medium and corrosive medium. The tube and the flange uses the material of stainless steel (1Cr19n9Ti or 316L). The orifice, floater of normal series uses material of stainless steel, The orifice, float and the tube lining of Anti corrosion series uses the anti corrosion material of PTEF(Teflon).

Working Principle

LZ Series Variable-area Flow-meter, as the fluid flow upwards in the metal tube, the floater moves upwards to a certain position where the lift force and the gravitational force meets balance, at the moment, the circulation area between the float and the orifice (or the cone tube) keeps fixed.

The circulation area is in proportion to the height of the floater, it means the height of the floater represent the volume of the flow. When the floater moves up and down, it transmits its position to the indicator outside in the form of Magnetic-coupling, in this way, making the needle of the indicator moves following the movement of the floater, and by using the cam board to show the value of flow linearly.

The electricity remote transmit means so far as the needle of the indicator pointed out the value, the flow-meter change the value into standard electric current signals of 4~20mA or 0~10mA accurately using angle displacement sensor and electric circuit.

 

Specification

Measuring range Water (20ºC)                  16~150000 l/h.

Air(0.1013MPa 20ºC)       0.5~4000 m3/h.

 Range ratio 10:1(Special type 20:1).
 Accuracy class 2.5(Special type 1.5% or 1.0%).
 Working pressure DN15~DN50 PN16MPa (Special type 25MPa).

DN80~DN150 PN10MPa (Special type 16MPa).

Pressure rating of jacket 1.6MPa.

 Medium temperature Normalized type -80ºC~+220ºC.

High-temperature type 300ºC.    Lined with FEP type ≤85ºC.

 Ambient temperature -40ºC~+120ºC(Remote display without LCD≤85ºC).

(Remote display with LCD≤70ºC).

 Dielectric viscosity 1/4″ NPT, 3/8″ NPT 1/2″ NPT≤5mPa.s

3/4″ NPT,1″ NPT ≤250mPa.s

 Output Standard signal: two-wire system 4 ~ 20mA (with HART communication).

Standard signal: three-wire system 0 ~ 10mA.

Alarm signal:1.Two-way relay output.

2.One-way or two-approach switches .

Pulse signal output: 0-1KHz isolated output.

 Process connection Standard type:24VDC±20%.

AC type:220VAC(85~265VAC) (optional).

 Connection mode Flange

Thread

Tri-clamp

 Levels of protection IP65/IP67.
 Ex-mark Intrinsically safe:ExiaIICT3~6.    Exd type:ExdIICT4~6.

 

rotameter flow rate

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