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Vertical Display Variable Area Flowmeter
Vertical Display Variable Area Flowmeter
Vertical Display Variable Area Flowmeter
Vertical Display Variable Area Flowmeter

Vertical Display Variable Area Flowmeter

Connection mode: Flange, Thread, Tri-clamp
Levels of protection: IP65/IP67.
Accuracy class: 2.5(Special type 1.5% or 1.0%).
Working pressure: 1.6MPa, 2.5MPa
Ambient temperature: -40℃~+120℃(Remote display without LCD≤85℃)
Technical Data
LZ series intelligent Metal tube floater flowmeter is a variable area flowmeter which is based on the floater position measurement.It adopts full metal structure, which is with the features of small volume, low pressure loss , big range ratio(10~20:1),optional transmitter with HART communication function and installation and maintenance convenient.It is widely used in various industries under the  complex and  bad environment, which is measuring the flow and controlling the process to the small flow and low flow velocity, and all kinds of harsh conditions of medium.
Vertical LCD Display Variable Area Flowmeter advantages:
1. Simple structure, good stability and reliability. 
2. Independent of medium’s physical and chemical states such as conductivity, dielectric constants, etc. 
3. Applicable for all kinds of medium environment such as corrosive, toxic and explosive one. 
4. Interface measurement or level measurement of 2 kinds of medium with different density. 
5.Two-wire 4~20mADC signal output, 0.8” or 0.56” LCD digital display. 
6.Easy-to-read displays on all flow meter types)
Vertical LCD Display Variable Area Flowmeter is mainly suitable for small and medium flow measurement of single-phase liquid or gas with small and medium pipe diameter, low noise and Reynolds number of acetic acid,like Air,Water,lubricating oil,Steam,Hydrogen,O2,etc,and many other Liquid or gas in the Chemical,Pharmaceutical, Petrochemical,Food,Metallurgical Industry ,etc.
Water Treatment
Water Treatment
Food Industry
Food Industry
Pharmaceutical Industry
Pharmaceutical Industry
Paper Industry
Paper Industry
Chemical Monitoring
Chemical Monitoring
Metallurgical Industry
Metallurgical Industry
Public Drainage
Public Drainage
Coal Industry
Coal Industry
Technical Data

Table 1: Vertical Display Variable Area Flowmeter Data Sheet

Measuring range

 Water (20℃)                  16~150000 l/h.

 Air(0.1013MPa 20℃)       0.5~4000 m3/h.

 Range ratio  10:1(Special type 20:1).
 Accuracy class  2.5(Special type 1.5% or 1.0%).
 Working pressure

 DN15~DN50 PN16 (Special type 2.5MPa).

 DN80~DN150 PN10 (Special type 1.6MPa).

 Pressure rating of jacket 1.6MPa.

 Medium temperature

 Normalized type -80℃~+220℃.

 High-temperature type 300℃.    Lined with FEP type ≤85℃.

 Ambient temperature

 -40℃~+120℃(Remote display without LCD≤85℃).

 (Remote display with LCD≤70℃).

 Dielectric viscosity

 1/4” NPT, 3/8” NPT 1/2” NPT≤5mPa.s

 3/4” NPT,1” NPT ≤250mPa.s


 Standard signal: two-wire system 4 ~ 20mA (with HART communication).

 Standard signal: three-wire system 0 ~ 10mA.

 Alarm signal:1.Two-way relay output.

                    2.One-way or two-approach switches .

 Pulse signal output: 0-1KHz isolated output.

 Process connection

 Standard type:24VDC±20%.

 AC type:220VAC(85~265VAC) (optional).

 Connection mode




 Levels of protection



 Intrinsically safe:ExiaIICT3~6.    Exd type:ExdIICT4~6.

Table 2: Vertical Display Variable Area Flowmeter Flow Range



Work number Flow range Pressure loss kpa

Water L/h 

Air m3/h Water Kpa Air
Normal type Anti-corrossion type Normal type
Anti-corrossion type

Normal type

Anti-corrossion type
15 1A 2.5~25 -- 0.07~0.7 6.5 - 7.1
1B 4.0~40 2.5~25 0.11~1.1 6.5 5.5 7.2
1C 6.3~63 4.0~40 0.18~1.8 6.6 5.5 7.3
1D 10~100 6.3~63 0.28~2.8 6.6 5.6 7.5
1E 16~160 10~100 0.48~4.8 6.8 5.6 8.0
1F 25~250 16~160 0.7~7.0 7.0 5.8 10.8
1G 40~400 25~250 1.0~10 8.6 6.1 10.0
1H 63~630 40~400 1.6~16 11.1 7.3 14.0
25 2A 100~1000 63~630 3~30 7.0 5.9 7.7
2B 160~1600 100~1000 4.5~45 8.0 6.0 8.8
2C 250~2500 160~1600 7~70 10.8 6.8 12.0
2D 400~4000 250~2500 11~110 15.8 9.2 19.0
40 4A 500~5000 300~3000 12~120 10.8 8.6 9.8
4B 600~6000 350~3500 16~160 12.6 10.4 16.5
50 5A 630~6300 400~4000 18~180 8.1 6.8 8.6
5B 1000~10000 630~6300 25~250 11.0 9.4 10.4
5C 1600~16000 1000~10000 40~400 17.0 14.5 15.5
80 8A 2500~25000 1600~16000 60~600 8.1 6.9 12.9
8B 4000~40000 2500~25000 80~800 9.5 8.0 18.5
100 10A 6300~63000 4000~40000 100~1000 15.0 8.5 19.2
150 15A 20000~100000 -- 600~3000 19.2 -- 20.3

Table 3: Vertical Display Variable Area Flowmeter Model Selection

Indicator Code                
Local indicator Z
LCD indicator with ouput D
Norminal diameter Code
DN15 -15
DN20 -20
DN25 -25
DN40 -40
DN50 -50
DN80 -80
DN100 -100
DN150 -150
Structure Code
Bottom-top /
Left-right (horizontal) H1
Right-left (horizontal) H2
Side-side AA
Bottom -side LA
Thread connection S
Tri-clamp M
Body material Code
304SS R4
316LSS R6L
Hastelloy C Hc4
Titanium Ti
Liner F46(PTFE) F
Monel M
Indicator type Code
Iinear indicator(pointer indication) M7
Nonlinear indicator(LCD Display) M9
Combination function(only for LCD display) Code
24VDC with 4~20mA output S
24VDC with HART communication Z
Battery power D
Additional function Code
Measuring tube with thermal preservation / heat insulation jacket T
Measure medium temperature higher than 120.C HT
Ex-proof: Code
With W
Without N
Alarm Code
One alarm K1
Two alarm K2
None N
Metal tube rotameter installation
Installed flowmeter should guarantee the entry ≥5DN straight pipe section,export straight pipe section not less than 250mm ;if the medium containing ferromagnetic material,magnetic filter should be installed in front of the flowmeter。(see magnetic  filter  and straight pipe section diamension diagram )

1.For flow meter installed,ensure the measuring pipe perpendicularity is better than 5 and should be equipped with bypass,easy to maintain and clean and does not affect production..
2.Monitoring and control system in the control valve,should be installed downstream of the flowmeter.For gas measurement,Should ensure the working pressure is not less than 5 times of pressure loss of the flowmeter, to make stable work of the flowmeter.
3.Before install the flowmeter,The pipe should be welding slag purging clean;When installation to remove locking component in the flow meter;when used after installation,Slowly open the control valve,Avoid shock damage  flow meter
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