ZRN-LZ series of metal rotameter

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LZ series of metal rotameter

ZRN-LZ series metal rotor flow meter for low flow, low Reynolds number flow measurement of the medium, this flow meter with electric remote-site instruction or function, remote output standard 4 ~ 20mA signal. You can configure the limit switch, control and alarm. The instrument has a reasonable structure, easy maintenance, small pressure loss, reliable, wide measuring range of features.
ZRN-LZ series metal rotor flowmeter has local display and intelligent remote type, with the pointer display instantaneous / accumulated flow LCD, upper and lower limit alarm output, accumulated pulse output, batch control, the standard two-wire 4- 20mA current output and other means for the user to provide a very broad choice, in addition to the instrument uses Motorola's advanced micro-processing chips and high-quality industrial assembly center 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 rotor flowmeter, and better cost performance, widely praised by the petrochemical, steel, power, metallurgy, light industry, food, pharmaceutical, water treatment and other industries of all ages.

• working principle :

ZRN-LZ series of metal flowmeter primarily consists of two parts: CPD indicator measuring tube and measuring tube includes a tapered tube or plate, a guide, a stopper, floats and other components, the indicator comprises a magnetic servo system, pointer, dial, wait until the assembly line.
Measured medium through the measuring tube float from bottom to top and lower ends are formed to produce a differential pressure rising force rising force that suffered when the float is immersed in a fluid stream weight float, the float will rise, annulus area increases, at the annulus fluid stream rapidly decreased, the upper and lower ends of the float reduced pressure, the force acting on the float rises decreases, until the lifting force of the float weight balance immersed in the fluid, the float will be in a stable position, i.e., to the level of the float position the size of the measured medium flow. The float built-in magnet in the float moves up and down with the media stop, the magnetic field varies with the movement of the float.

• main feature:

For small caliber and low velocity medium flow measurement
Reliable, low maintenance, long life.
For less demanding, wide straight pipe flow ratio of 10: 1
Large dual line LCD display, optional on-site instantaneous / accumulated flow display, with backlight
Uniaxial sensitive instructions
All-metal structure, suitable for high temperature, high pressure and strong corrosive media
It can be used for flammable and explosive occasion

• The main technical parameters:

Accuracy grade: 1.5
Measuring range: Water: 25 ~ 100000L / h
Air: 0.7 ~ 1500m3 / h
Range ratio: 10: 1
Nominal pressure: DN15, DN25, DN50 to PN ≤ 10MPa
DN80, DN100 to PN ≤ 6.3MPa
Ambient temperature: -40 ~ 70 ℃
Measured medium temperature: -40 ~ 200 ℃
≤ 200 ℃ (high temperature)
Power inlet: M20 * 1.5 (female)
Medium Viscosity: DN15: η (5mPa.s (FZ15.1, FZ15.2, FZ15.3)
η (30mPa.s (FZ15.4, FZ15.5, FZ15.6, FZ15.7, FZ15.8)
DN25: η (250mPa.s
DN50 ~ 100: η (300mPa.s
Flange standard: JB / T82.1-94 (flat flange) JB / T82.2-94 (convex flange)
Meter structure
Flowmeter mainly by measuring and indicator of two parts, according to the different connectors can be mounted both horizontally and vertically divided into two.
Measuring section
Basic: wetted parts material 0Cr19Ni9, suitable for liquid measurement.
Anti-corrosion: Teflon lined, suitable for measuring corrosive media.
Jacketed: the need for heat or cooling medium occasions, jacket connection flange DN15, PN1.6.
Damping type: Suitable for gas measurement.
Indicator portion
Indicating site: instantaneous flow rate for on-site instruction.
Remote Type: 4 ~ 20mA DC output signal, remote function.
Alarm type: alarms for the occasion demands.

• Product Selection:

Selection example:

LZ-R2YWWDWC the LZ series of metal rotameter, wetted material for 0Cr19Ni9, local indication + Remote (intrinsically safe), no alarm, no insulation jacket, medium operating temperature range of -40 ~ 100 ℃, no damping type, installed vertically.
Each bore flow measurement upper limit corresponding table:

Air calibration status T = 20 ℃, P = 0.1013Mpa
filter
If the medium containing solid particles, shall, before the installation of straight pipe upstream of the filter corresponding to filter particulate impurities, if the medium containing the ferromagnetic substance, shall purchase the machine at the same time, I produced with a magnetic filter to Anti affect the accuracy of the instrument and to extend the life of the instrument magnetic filter (see below), wetted in 0Cr19Ni9, 00Cr17 -. Ni14Mo2, PTFE and optionally other materials.
Installation Requirements
1. The instrument can be mounted on a vertical or horizontal pipe, vertical flow media must be bottom-up horizontal flow of the media should be consistent with the direction of the arrow on the meter. Meter straight pipe length upstream device 5DN, downstream set 250mm long straight sections, set up after the regulation flow valve, the position should be in the straight pipe downstream of the meter.
2. Recommended installation method, a bypass pipe (see right). Recommends using spirit level and plumb installation verticality detection meter to ensure the accuracy of the flowmeter.
3. The flow meter installed on the pipe should not be an external force, in place of the installation of the meter entrance support, can largely unaffected by external force meter.
4. When installing the lining of polytetrafluoroethylene (PTEE) meter, tighten the flange bolts should be especially careful, do not place too Meng requires symmetrical fastening tight to prevent deformation of PTFE.
5. In order to avoid the impact of the fluid inside the measuring device of the float, the instrument must be used to open the valve slowly, particularly when used to measure the flow rate of gas medium, can be straight-stage gas damper means or throttle valve installed downstream of the meter in order to maximize reduce the vibration of the float.