Pointer flowmeter

Pointer flowmeter, also known as metal rotor flowmeter, is actually a variable area flowmeter. It usually has an upright spinal canal and a float that can freely move up and down in its flow rate. When the fluid flows through the spinal canal from bottom to top, the kinetic energy of the fluid generates thrust S and buoyancy A on the float, causing it to rise. As the annular flow area between the inner wall of the spinal canal and the float increases, the thrust S generated by fluid kinetic energy on the float decreases accordingly. When the sum of thrust S and buoyancy is equal to the float's own gravity G, the float is in equilibrium and stable at a certain height. The scale corresponding to this height position indicates the flow rate of fluid through the flowmeter. The principle is summarized as follows: when the measured medium is at a certain level, the magnetic float corresponds to the position of a float in the measuring tube. This float position is transmitted to the pointer through the magnetic coupling system in the indicator, and the corresponding flow rate value can be read on the dial.

The WLH steam metal tube float flowmeter can measure liquids, gases, and water vapor, and has the characteristics of being sturdy, safe, and durable. Its high pressure and high temperature resistance properties are particularly suitable for measuring highly corrosive, turbid, and dirty liquids. This series of flow meters has a complete range of specifications and varieties, including indicative, electric remote transmission, corrosion-resistant, jacketed explosion-proof, and other products.

The WLH steam metal tube float flowmeter mainly consists of two parts: 1 sensor and 2 converter. The sensor converts the flow rate into the displacement of the float, and through a magnetic coupling system, transmits the displacement of the float to the converter to indicate the flow rate. The converter has two structural forms, M1 and M2, and is equipped with different transmitters to form different functional combinations.

Product Overview:

The WLH steam metal tube float flowmeter is a modular metal tube float flowmeter with an all metal structure that can be equipped with a hysteresis free transmitter and no transmission mechanism. It can be installed with an air damping device on site. Based on modular design, remote signal output, switch signal output, cumulative quantity display, HART protocol execution, Profibus PA bus, all can be installed and used in real-time according to user needs. High temperature and high pressure design, selection of anti-corrosion materials, and X-ray inspection can ensure that the product is suitable for any on-site needs.

Performance advantages:

The metal tube float flowmeter is suitable for measuring the flow rate of small caliber and low flow rate media;

★ Reliable work, minimal maintenance, and long lifespan;

The metal tube float flowmeter does not have high requirements for the straight pipe section;

★ Wide traffic ratio of 10:1;

★ Dual row large LCD display, optional on-site instantaneous/cumulative flow display, with backlight single axis sensitive indication;

★ Non contact magnetic coupling transmission;

★ Metal tube float flowmeter with all metal structure, suitable for high temperature, high pressure and highly corrosive media;

★ Can be used in flammable and explosive hazardous environments;

★ Optional two-wire system, battery, and AC power supply methods; Multi parameter calibration function;

The metal tube float flowmeter is equipped with data recovery, data backup, and power failure protection functions

Product Features

★ Sturdy, concise, and reliable design
★ Modular and intelligent indicator settings
★ One time molding measurement cone tube
★ Ceramic air damping device
★ Sturdy, concise, and reliable design
★ X-ray inspection
★ Low pressure loss design
★ Short stroke, small structure, 250mm high
★ KROHNE's calculation software from Germany ensures accurate calculations
★ Multi level correction of medium viscosity, density, temperature, and pressure
★ Fully imported flow verification device ensures product accuracy
★ Stress testing, product verification
★ Multiple indicators M7, M9, M10 to choose from
★ Multiple signal outputs: 4-20mA; 0.02-0.1MPa; switch signal
★ Multiple technical certifications ensure quality

Technical Specifications:

1. Measurement range:Water: 2.5L/h~200m at 20 ℃³/h

Air: 1.013 bar abs at 20 ℃, 0.7-4500m3/h

2. Accuracy level (VDI/VDE)

Standard accuracy: 1.5% (high accuracy of 1.0% after special multi-point verification)

Standard precision (PTFE type): 2.5% High precision precision (PTFE type): 1.5%

3. Range ratio: 10:1

4. Fluid working pressure: DN15~DN50: 4.0MPa; DN80 ～ DN100:1.6MPa
Jacket working pressure 1.6MPa

5. Fluid working temperature -80~150 ℃

6. The connection method is flange connection or threaded connection, and the flange standard is GB/T9119; ANSI 150 l bs 、300 l bs ; HG20592 ～20635; Other standard flanges can also be customized according to user requirements.

7. Environmental temperature: -25 to+55 ℃

8. Wiring cable: RVVP 3X28/0.15
9. Medium viscosity: DN15 ≤ 5mpa. s; DN25 ～ DN100≤250mpa.s
10. Electrical signal output: Output signal: 0-10mA, 4-20mA
Linearity: 1%
Temperature effect: 0.5%/10 ℃
Power supply voltage: 13~30VDC
Power consumption: ≤ 250mW
11. Limit alarm: Power supply: 220VAC ± 10%
Power consumption: ≤ 3W
Working temperature: -25~60 ℃

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