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Pointer Indicating Metal Tube Flow Meter With IP67 Protection Class , LZZ - Q Type

LZZ

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Description

LZZ-Q Type In situ pointer with nominal diameter DN 15 - 100mm
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Technical parameters
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The electric voltage VDC | —— |
output signal | Pointer indicating |
Media status | Liquid, gas, |
Answer the liquid material | 304,316L |
Medium temperature ℃ | -196～300 |
nominal pressure PN MPa | 25.0 |
nominal diameter DN mm | 15 - 100 |
Explosion- proof type | —— |
Flange standard | HG/T20592-2009; HG/T20617-2009 (or on request) |
Protection class | IP67 |
Precision | DN15,DN20:2.0%FS;
DN25～DN100:1.6%FS |
Flow rate range | Water: 2.5 L/h --100000L/h(20℃)
Air : 0.07--1800m3/h(0.1013MPa, 20℃) |
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???Summary?LZZ-Q type metal pipe flow meter Is one of the type LZZ series of metal tube float flowmeter, is purely mechanical field indicating instrument, can measure the liquid, gas and steam, Due to no electronic components in the converter, so it not only can be used in the explosion place, also can be used under the condition of need explosion-proof condition. has strong, safe, durable, easy maintenance, instrument strictly straight pipe upstream requirements, etc. For small flow and low Reynolds number flow measurement, compared with other flowmeter has the unique superiority. Especially suitable for measuring the corrosive strong, turbidity and dirty liquids. This product is widely used in chemical, petroleum, pharmaceutical, food and beverage industries.??Production enforce standard
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JB/T 6844-2015 Metal tube rotameter
JJG 257-2007 float flowmeter?Operating principle
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LZZ - Q type tube flow meter, consists of two parts, sensor and converter.Vertical from bottom to top through the gauge measured medium, will float float gauge, float the built-in magnet steel rollers with indicator testing magnetic coupling. When the buoyancy of the medium, the resistance and float balance gravity float stays at a particular location, float the discretion of the position is the size of the measured medium flow. Float within the magnetic steel and detection of magnetic coupling, make the detection of magnetic rotation. For in situ indicating pointer fixed on the rotating shaft, also followed the axis of rotation, corresponding to the instantaneous flow values, pointer and dial completed flow value calibration instructions.
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The characteristics of the flow meter and use ituse
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Suitable for small diameter and low flow velocity. The calibre of the commonly used flow meter between 40 ~ 100 mm. Suitable for low Reynolds number.

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Is lower than other types of flowmeter for minimum Reynolds number.

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The pressure loss is low. Metal pipe flow meter is usually about 4 ~ 20 kpa.

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On the straight pipe upstream requirements is low. After general for the first five times the diameter, 250 mm.

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Have a wide flow range, generally 10:1.

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The application of flow meter is still limited to small and medium caliber, corresponding to the language is suitable for the low velocity of advantages.

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If you use medium and factory calibration medium is different, do flow value correction, calibration, manufacturers need to be done in the test device and the radial scale conversion. General flow meter manufacturer with 20 ℃ and 0.1 MPa water liquid calibration.


?Precautions for use
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In view of the working principle of the instrument meter must be installed in vertical pipe runs, and the flow of the medium, must be from the vertical. Fluid set five times the native caliber long straight pipe upstream and downstream straight pipe set 250 mm long, set the flow adjusting valve, its location should be set after the straight pipe on the downstream side of the instrument.
?Recommended installation
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Set the by-pass pipe. Recommend the use of level and lead detection meter installation of vertical degree. Should not be installed on the pipeline of the flowmeter, external force in the proper position of the meter equipped with support, basic is not affected by external force can make the flow meter.
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