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LZB/LZJ seriesGlass rotor flowmeterWidely used in chemical, petroleum, light industry, medicine, environmental protection, food and metrology testing, scientific research and other departments to measure the flow rate of single-phase non pulsating fluids (liquids or gases).
The LZB/() F/LZJ - () F series corrosion-resistant glass rotor flowmeter has strong corrosion resistance and can detect the flow of acids (except hydrofluoric acid), alkalis, oxidants, and other corrosive gases or liquids. The glass rotor flowmeter is suitable for industries such as chemical, pharmaceutical, papermaking, and sewage treatment.
| Appearance and installation dimensions |
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principle and structure
The flowmeter is mainly composed of a conical glass tube that expands from bottom to top and a float that moves up and down with the flow rate of the fluid (Figure 3). When the fluid flows through the conical tube from bottom to top, the lift S generated by the kinetic energy of the fluid on the float and the buoyancy A of the fluid cause the float to rise. When the sum of the lift S and buoyancy A is equal to the weight G of the float itself, the float is in equilibrium and stable at a certain height position. The scale on the conical tube indicates the flow rate value of the fluid.
The float reading position in the flowmeter is shown in Figure 2 |
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The cone tube of LZB/LZB - () F flowmeter is a smooth inner wall tube (see Figure 4). For flowmeters with a diameter of DN15 or more, the float moves up and down through the guide rod to maintain stability; There are three guiding ribs on the inner wall of the cone tube of LZJ/LZJ - () F flowmeter, which keep the float stable (see Figure 4). Flow meters with a diameter of DN10 or less are connected by hoses and equipped with needle shaped flow control valves; Flow meters with a diameter of DN15 or above shall be connected with flanges.
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Materials of components in contact with measuring fluids |
Model specifications and technical parameters
Diameter DN
(m) |
Model |
measuring range |
Spinal canal length (m) |
accuracy class |
Allow the tested liquid state |
Water at 20 ℃ |
air
20℃，10132SPa |
LZB/LZJ |
LZB-()F |
temperature
（℃） |
pressure
（MPa） |
2 |
LZB-2 |
0.4~4ml/min
0.6~6ml/min
1.0~10ml/min
1.6~16ml/min |
6~60ml/min
10~100ml/min
16~160ml/min
25~250ml/min |
160 |
1.5:2.5 |
2.5:4 |
-20~+120 |
≤0.4 |
3 |
LZB-3 |
2.5~25ml/min
4~40ml/min
6~60ml/min
10~100ml/min |
40~400ml/min
60~600ml/min
100~1000ml/min
160~1600ml/min |
4 |
LZB-4
LZB-4F |
(1~10)L/h
(1.6~16)L/h
(2.5~25)L/h |
(16~160)L/h
(25~250)L/h
(40~400)L/h |
6 |
LZB-6
LZJ-6
LZJ-6F |
(2.5~25)L/h
(4~40)L/h
(6~60)L/h |
(40~400)L/h
(60~600)L/h
(100~1000)L/h |
10 |
LZB-10
LZJ-10
LZJ-10F |
(6~60)L/h
(10~100)L/h
(16~160)L/h |
(100~1000)L/h
(160~1600)L/h
(250~2500)L/h |
2.5 |
≤0.6 |
15 |
LZB-15
LZJ-15F |
(16~160)L/h
(25~250)L/h
(40~400)L/h |
(0.25~2.5)m³/h
(0.4~4)m³/h
(0.6~6)m³/h |
350 |
25 |
LZB-25
LZJ-25F |
(40~400)L/h
(60~600)L/h
(100~1000)L/h |
(1~10)m³/h
(1.6~16)m³/h
(2.5~25)m³/h |
40 |
LZB-40
LZJ-40F |
(160~1600)L/h
(250~2500)L/h |
(4~40)m³/h
(6~60)m³/h |
430 |
50 |
LZB-50
LZJ-50F |
(0.4~4)m³/h
(0.6~6)m³/h |
(10~100)m³/h
(16~160)m³/h |
450 |
80 |
LZB-80
LZB-80F |
(1~10)m³/h
(1.6~16)m³/h |
(50~250)m³/h
80~400)m³/h |
500 |
≤0.4 |
100 |
LZB-100
LZB-100F |
(5~25)m³/h
(8~40)m³/h |
(120~600)m³/h
(200~1000)m³/h |
All stainless steel type
The flange, float, guide rod, support plate, and bolts are all made of stainless steel 304 (1Cr18Ni9Ti), with the model LZB - () B.
If 316 is required for the liquid receiving material, the model is LZB - () Bo and it needs to be customized.
If stainless steel lined with PTFE is required, the model is LZB - () BF (or BoF), which needs to be customized.
Full tetrafluoroethylene type
The base, float, and needle valve are made of polytetrafluoroethylene (PTFE). Support plates, screws, etc. are made of stainless steel
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