The float of the ZQ-LZ metal tube rotor flowmeter is vertically installed inside the conical measuring tube. Due to the action of the fluid, it can move freely up and down in the conical tube. The outer diameter of the float and the annular area formed by the conical tube change with the position of the float. When the fluid flow rate stabilizes at a certain value, the float is also in a dynamic equilibrium state at a certain position, and the annular area between it and the conical tube remains constant. At this time, the float is subjected to three forces: the downward weight W of the float, the upward buoyancy F, and the dynamic force P of the fluid. These three forces reach equilibrium. According to the Bernoulli equation, force balance equation, and continuity theorem of fluid dynamics, the average instantaneous flow rate of fluid passing through the annular area can be calculated.

1. Basic metal tube rotor flowmeter:

(1) Measurement range: Water (20 ℃) 2.5-150000 L/h

Air (20 ℃, 0.1013MPa) 0.07-4000Nm3/h;

(2) Range ratio: 10:1;

(3) Accuracy: 1.5/2.5;

(4) Work pressure: ≤ 6.4MPa;

(5) Working temperature: -40~350 ℃ (fluoroplastic lining -10~80 ℃);

(6) Environmental temperature: -20~80 ℃;

(7) Medium viscosity: DN15 ≤ 5mPa. S, DN25-DN150 ≤ 250mPa. S;

(8) Tube material: 1Cr18Ni9Ti, 316L, lined with PTEF, etc;

(9) Process connection: flange, or as provided by the user;

(10) Steam jacket head: flange: DN15/PN1.6, or as provided by the user.

2. Equipped with remote transmission metal tube rotor flowmeter:

(1) Basic error: 1.5% F.S;

(2) Output signal: 4-20mA;

(3) Load impedance: 350 Ω;

(4) Power supply voltage: 24V DC;

(5) Environmental temperature: -30~80 ℃;

(6) Outlet: M20 × 1.5;

(7) Explosion proof mark: ExibIICT4;

Bottom in, top out

corrosion-resistant type

Upward progress, downward exit

Bottom in and side out

Jacket type

horizontal installation

path

（DN）

L

（mm）

H

（mm）

B

（mm）

15

150

250

220

25

150

250

230

50

175

250

270

80

210

250

300

100

230

250

320

150

265

400

360

200

300

500

390

Diameter (mm)

Flow range

Pressure loss kPa

Water L/h

Air M3/h

water

air

Conventional type

corrosion-resistant type

Conventional type, anti-corrosion type

DN15

2.5～25

---

0.07～0.7

6.5

7.1

4.0～40

2.5～25

0.11～1.1

6.5

7.2

6.3～63

4.0～40

0.18～1.8

6.6

7.3

10~100

6.3～63

0.28～2.8

6.6

7.5

16~160

10~100

0.40～4.0

6.8

8.0

25~250

16~160

0.7～7.0

7.2

10.8

40~400

25~250

1.0～10

8.6

10.0

63~630

40~400

1.6～16.0

11.1

14.0

DN25

100~1000

63~630

3~30

7.0

7.7

160~1600

100~1000

4.5～45

8.0

8.8

250~2500

160~1600

7~70

10.8

12.0

400~4000

250~2500

11~110

15.8

19.0

DN40

500~5000

---

12~120

10.8

9.8

600~6000

----

16~160

12.6

16.5

DN50

630~6300

400~4000

18~180

8.1

8.6

1000~10000

630~6300

25~250

11.0

10.4

1600~16000

1000~10000

40~400

17.0

15.5

DN80

2500~25000

1600~16000

60~600

8.1

12.9

4000~40000

2500~25000

80~800

9.5

18.5

DN100

6300~63000

4000~40000

100~1000

15.0

19.2

DN150

20000~100000

---

600~3000

19.2

20.3

ZQ-LZ

Metal tube rotor flowmeter

caliber

（mm）

15

DN15

80

DN80

25

DN20

100

DN100

40

DN40

150

DN150

50

DN50

200

DN200

structural form

/

Bottom in, top out

AA

Side in, side out

H1

Left in, right out

LA

Low inlet side outlet

H2

Right in, left out

S

threaded installation

M

Sanitary quick installation type

body material

R1

321 stainless steel

RH

Hastelloy C

R4

304 stainless steel

RT

Titanium

R6

316 stainless steel

RF

Stainless steel lined with PTFE

Indicator type

7

Pointer displays instantaneous flow rate

9

LCD displays instantaneous and cumulative

Power supply and output signal

K

4～20mA DC24V

Z

4-20mA DC24V+HART protocol

D

Lithium battery powered with LCD meter head

alarm output

/

No alarm output

1

Equipped with an alarm output

2

Equipped with two alarm outputs

measuring medium

L

liquid

G

gas

Additional options

T

Measurement tube with insulation jacket

B

Explosion proof (ExII CT6)