LZZ-50/R4/M9/G LZZ-50/R4/M9/L LZZ-50/R4/M7/G LZZ-50/R4/M7/L Metal tube Rotameter
Overview of LZZ-50/R4/M9/G LZZ-50/R4/M9/L LZZ-50/R4/M7/G LZZ-50/R4/M7/L Metal tube Rotameter
The rotameter measures the fluid flow according to the throttling principle, but it changes the flow area of the fluid to keep the differential pressure above and below the rotor constant, so it is also called a variable flow area constant differential pressure flowmeter, also known as a float flowmeter.
In a vertical conical tube that expands from bottom to top, the gravity of the circular cross-section float is borne by hydrodynamic forces, and the float can rise and fall freely within the conical tube. It moves up and down under the action of flow rate and buoyancy, and after balancing with the weight of the float, it is transmitted to the dial to indicate the flow through magnetic coupling. Generally divided into glass and metal rotameters. Metal rotameters are the most commonly used in the industry. Glass materials are usually used for corrosive media with small diameters. Due to the fragility of glass materials, the key control points are also rotameters made of precious metals such as titanium.
Rotameter is a variable area flow meter based on float position measurement. It adopts all-metal structure and Modular concept design. It has small pressure loss, large turndown ratio (10:1), easy installation and maintenance, and can be widely used in complex and harsh environments. In flow measurement and process control of environmental and various media conditions.
Working principle of LZZ-50/R4/M9/G LZZ-50/R4/M9/L LZZ-50/R4/M7/G LZZ-50/R4/M7/L Metal tube Rotameter
The rotameter consists of two parts, one part of the rotameter is a conical tube that gradually expands from bottom to top; the other part of the rotameter is a rotor placed in the conical tube and can move freely up and down along the center line of the tube . When measuring the flow of the fluid, the fluid to be measured flows in from the lower end of the conical tube, and the flow of the fluid impinges on the rotor and produces a force on it (the magnitude of this force varies with the flow); when the flow is large enough , the resulting force lifts the rotor and raises it. At the same time, the measured fluid flows through the annular section between the rotor and the conical tube wall.
At this time, there are three forces acting on the rotor: the dynamic pressure of the fluid on the rotor, the buoyancy of the rotor in the fluid and the gravity of the rotor itself. When the flowmeter is installed vertically, the center of gravity of the rotor coincides with the axis of the tapered tube, and the three forces acting on the rotor are in a direction parallel to the tube axis. When the three forces reach equilibrium, the rotor floats smoothly at a certain position in the cone. For a given rotameter, the size and shape of the rotor have been determined, so its buoyancy in the fluid and its own gravity are known to be constant, only the dynamic pressure of the fluid on the float varies with the flow velocity. . Therefore, when the incoming flow velocity becomes larger or smaller, the rotor will move up or down, and the flow cross-sectional area of the corresponding position will also change. Until the flow velocity becomes the corresponding speed when the flow velocity becomes balanced, the rotor will be stable at the new position. For a given rotameter, there is a one-to-one correspondence between the position of the rotor in the cone and the flow rate of the fluid through the cone.
Feature of LZZ-50/R4/M9/G LZZ-50/R4/M9/L LZZ-50/R4/M7/G LZZ-50/R4/M7/L Metal tube Rotameter
Relying on the advantages of small pressure loss and large detection range, it has become a very commonly used flow measurement instrument in industrial control. It is not only easy to use, but also has the advantages of strong compatibility. It is especially suitable for medium flow measurement with low flow rate and small flow. Rotameter has local display type and intelligent remote transmission type, with pointer display, instantaneous flow, cumulative flow, liquid crystal display, upper and lower limit alarm output, cumulative pulse output, standard two-wire 4-20mA current output and other forms , providing users with a very broad choice space. In addition, the instrument adopts high-quality MCU micro-processing system, which ensures the excellent performance of the rotor flowmeter in various application places.
Over the years, the various excellent performance and reliability of the rotor flowmeter, as well as the better performance-price ratio, have been widely favored by petrochemical, steel, electric power, metallurgy, light industry and other industries.
1. Suitable for small diameter and low flow rate
2. Reliable work, low maintenance, long life
3. The requirements for the downstream straight pipe section are not high
4. Has a wider flow range of 10:1
5. In-place pointer indication is close to linear
6. The intelligent indicator has LCD liquid crystal display, which can display instantaneous and cumulative flow, and can also output pulses and output alarms
7. With temperature compensation
8. There are local type, remote transmission type, jacket type, horizontal type, explosion-proof type, corrosion-resistant type, etc.
Main tech data of LZZ-50/R4/M9/G LZZ-50/R4/M9/L LZZ-50/R4/M7/G LZZ-50/R4/M7/L Metal tube Rotameter
Turndown ratio: 10:1; (up to 15:1 according to the user)
Accuracy class: 2.5; special 1.5;
Pressure loss: 6.5KPa -38.2KPa
Fluid temperature: -80-400°C (-80--+90°C lined with fluoroplastics)
Fluid viscosity: 15≤5mPa?S; 25-150≤300mPa?S
Working pressure: 1.6MPa, 2.5MPa, 4.0MPa, 6.3MPa (≥10MPa)
Connection method: flange connection (please negotiate with the manufacturer for threaded connection)
Press JB81-59; JB82-59
Output electrical signal: 4-20mA for two-wire system, 0-10mA for three-wire system.
Power supply voltage: 24V±20%DC (no effect on output)
Power consumption: about 25mA
Electrical signal temperature effect: 0.5%/10℃
Load resistance: 0-10mA, 0-1.2kΩ; 4-20mA, 0-500Ω
Wiring cable: RVVP3×28/0.15; 2×28/0.15; 4×28/0.15
Sensor connection height: standard type is 250mm
Magnetic filter height: standard type: 100mm (can also be determined by the user)
Sensor installation form: base type is 250mm (can also be determined by the user)
Indicator corrosion protection category: dustproof and dripproof (equivalent to IP65)
General meridian (mm)
Flow range
Pressure loss(kPa)
Water L / h*
Air M3/h
Conventional type
Corrosion resistant
Conventional type, anti-corrosion type
Water
Air
50
630~ 6300
1000~ 10000 |
1600~ 16000
400~ 4000
630~ 6300
1000~10000
18~ 180
25~ 250
40~ 400
8.1
11.0
17.0
8.6
10.4
15.5
15
2.5~25
4.0~40
6.3~63
10~ 100
16~ 160
25~ 250
40~400
63~ 630
2.5~25
4.0~40
6.3~63
10~ 100
16~ 160
25~ 250
40~400
0.07~0. 7
0.11~1.1
0.18~1.8
0.28~2.8
0.40~4.0
0.7~7.0
1.0~10
1.6~16.0
6.5
6.5
6.6
6.6
6.8
7.2
8.6
11.1
7.1
7.2
7.3
7.5
8.0
10.8
10.0
14.0
40
500~ 5000
600~ 6000
12~ 120
16~160
10. 8
12.6
9. 8
16.5
25
100~ 1000
160~ 1600
250~ 2500
400~ 4000
63~ 630
100~ 1000
160~ 1600
250~ 2500
3~30
4.5~45
7~70
11~110
7.0
8.0
10.8
15.8
7.7
8.8
12.0
19.0
80
2500~ 25000
4000~40000
1600~16000
2500~25000
60~600
80~800
8.1
9.5
12.9
18.5
100
6300~63000
4000~40000
100~1000
15.0
19.2
150
20000~100000
600~3000
19.2
20.3
Note: Any special design or question of LZZ-50/R4/M9/G LZZ-50/R4/M9/L LZZ-50/R4/M7/G LZZ-50/R4/M7/L Metal tube rotameter, kindly contact the manufacturer for more details.
Contact: Kevin
Phone: +8615189522935
Tel: +86-517-86800063
Whatsapp: +8615189522935
Email: sales@xfmeter.com
Add: No.118 HengyangNanRoad, Jinhu County, Huaian,Jiangsu, China
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