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HNIF-5000 metal tube rotameter

I. Overview 

HNIF-5000 metal tube is commonly used in industrial automation and process control a variable area flow measurement instruments. It is small, a large detection range, easy to use features. It can be used to measure liquid, gas and steam flow, especially suitable for small medium flow measurement of low velocity flow.
Smart metal tube has local display and intelligent remote type, with a pointer display instantaneous flow, liquid crystal display instantaneous and cumulative flow, the lower limit alarm output, pulse output, the standard two-wire 4 - 20mA current output, Hart protocol output, ModBus protocol output and other means for the user to provide a very broad choice. In addition, this instrument uses advanced 16-bit microprocessor and high-quality industrial components to ensure that the flow meter in a variety of application areas of excellent performance.

Over the years, a variety of excellent performance and reliability of the metal tube, and better cost performance, widely by the petroleum, petrochemical, iron and steel metallurgy, electric power, light industry, food, pharmaceutical, water treatment and other industries of all ages.

Second, the structure and working principle

1. structure
This series of metal tube executed Chinese JB / T 6844-1993 national standard. The major products consists of two parts: the measuring tube and indicator. Including measuring tube taper pipe or orifice, guides, stoppers, floats and other components, the indicator comprises a magnetic servo system, pointers, dial, circuit boards (remote) and other components.

2. working principle
Bottom-up measured medium through the measuring tube float up and down side is formed to produce a differential pressure rising force, suffered when the float rises immersed in a fluid force is greater than the weight of the float, the float will rise, annulus area increases, at the annulus fluid flow rate decreased rapidly, the upper and lower ends of the float pressure difference decreases, the force acting on the float to rise with the decrease, until the upward force of the float and weight balance in the immersion fluid, the float has stabilized at a certain position, i.e., the level corresponding to the position of the float the size of the measured medium flow. Float magnet built in the float moves up and down with the media, the magnetic field varies with the movement of the float.
a, in situ type: the spot generated by the indicator follower magnet magnet is coupled with the float, rotate, and driven pointer, this time through the dial indicates the size of the flow.
b, intelligent remote type: from intelligent indicator follower magnet magnet coupled with the float, rotate occurred while driving and sensing magnet pointer, the magnetic field changes by the magnetic sensor will be converted into electrical signals, a / D conversion, digital filtering, temperature compensation, the microprocessor processing, D / a output, LCD liquid crystal display to display the instantaneous flow rate and cumulative flow size.
3. type: Depending on the measuring tube structure, the metal tube into the next entry on out, the next entry on the cross, at the cross on the cross into the right into the left out, left right out, progress under the type, choose a different form of a tube measured according to different requirements of users, are very easy maintenance and cleaning, on this basis, the various forms of the measuring tube coupled with intelligent metal tube indicator independent intellectual property rights can an intelligent metal tube, wherein the indicator has passed the national patent.

Third, the main features of

Suitable for small caliber and low velocity medium flow measurement
Reliable, low maintenance, long life
For less demanding straight pipe
Wide flow ratio of 10: 1 special type: 20: 1
Large dual line LCD display, can display instantaneous flow rate and cumulative flow can be backlit
Uniaxial sensitive instructions
Non-contact magnetic coupling drive
All-metal structure, suitable for high temperature, high pressure and corrosive media
It can be used for flammable, explosive hazardous areas
Optional two-wire, battery, AC power supply
Multi-parameter calibration function with data recovery, data backup and power-down protection
Fourth, the main technical parameters
Measuring range: water (20 ℃) ​​1 ~ 200000 L / h
Air (20 ℃, 0.1013MPa) 0.03 - 4000m3 / h
(See flow meter, flow can be special ordered)
Turndown ratio: Standard 10: 1 special type of 20: 1
Accuracy: standard 1.5-type Remote 1.0
Pressure rating: Standard: DN15 - DN50 ≤ 4.0MPa DN80-DN200 ≤ 1.6MPa
Jacketed pressure rating 1.6MPa, in consultation with a special type of plant in front of the selection and ordering
Pressure loss: 7kPa-70kPa
Medium temperature: Standard - 80 ℃ - + 100 ℃; PTFE: 0 ℃ - 100 ℃
High temperature 110 ℃ -450 ℃
Medium viscosity: DN15: η <5mPa.s (F15.1-F15.3)
η <30mPa.s (F15.4-F15.8)
DN25: η <250mPa.s
DN50-DN200: η <300mPa.s
Ambient temperature: remote type: - 4 0 ℃ - + 85 ℃ (LCD will not be damaged), the liquid crystal to work at -30 ℃ - + 80 ℃
Situ pointer: - 40 ℃ - + 100 ℃
Connection: Standard: Standard DIN2501 standard flange
Special type: a user-specified any standard flange or threaded
Cable Connection: flameproof to 1 / 2NPT internal thread, internal thread M20 * 1.5 other
Power supply: Standard: 24VDC two-wire 4 - 20mA (12VDC - 32VDC)
Alarm Type: 24VDC four-wire 4 - 20mA (18VDC - 28VDC)
AC type: 85 - 265VAC 50Hz
Battery type: 3.6V@7.5AH lithium battery, can be used continuously for three years
Load characteristics: Two-wire: RLmax = 50 * (power supply voltage -12) Ω = 600 Ω @ 24V
Multi-line system: maximum load resistance is 5 0 0 Ω
Alarm output: upper or lower instantaneous flow alarm
Reed switch alarm (contact capacity 1A @ 30VDC)
Relay output (contact capacity 1A @ 30VDC or 0.25A@250VAC or 0.5A@125VAC)
Pulse output: Cumulative pulse output, the minimum interval of 50 ms (open collector output, maximum load 100mA @ 30VDC, internal impedance of 100 Ω)
LCD: display the instantaneous flow value range: 0--50000 (available with a decimal point)
Cumulative flow display Value range: 0--99999999 (available with a decimal point) is automatically reset
Protection: IP65
Explosion-proof mark: intrinsically safe Exia Ⅱ CT5 card number: CE062002, flameproof Exd Ⅱ BT6 No.: CE051423
Instrumentation installation height: DN15-DN200 standard vertical height 250mm,> DN80 diameter high-pressure type instrument height 350mm