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Anti corrosion metal rotor flowmeter
The metal rotor flowmeter has a simple structure, reliable operation, high accuracy, and a wide range of applications. Compared with glass rotor flow
Product details
1、 Product Overview
The metal rotor flowmeter has a simple structure, reliable operation, high accuracy, and a wide range of applications. Compared with glass rotor flow meters, it can withstand higher pressures. The ZS-LZ series flowmeter has various types such as local indication, electric remote transmission, limit switch alarm, corrosion resistance, jacket type, damping type, and explosion-proof. Widely used in the measurement and automatic control of liquid and gas flow in departments such as national defense, chemical industry, petroleum, metallurgy, power, environmental protection, medicine, and light industry.
The flow meter detection parts are all made of 1Cr18Ni9Ti stainless steel material, and in special occasions, they can also be composed of corrosion-resistant materials such as Cr18Ni12Mo2Ti or F46. The height of the flowmeter is 250 mm, except for special specifications. The connecting flange adopts GB/T9119.8-10 standard, and can also be customized according to the user's special requirements.
Metal tube float flowmeter
2、 Measurement principle of flowmeter
A metal rotor flowmeter is a variable area flowmeter that typically has an upright conical tube and a float that can freely move up and down with the flow rate (as shown in Figure 1). When the fluid flows through the conical tube from bottom to top, the thrust S generated by the kinetic energy of the fluid on the float and the buoyancy A of the fluid cause the float to rise. As the annular flow area between the inner wall of the cone tube and the float increases, the thrust S generated by the fluid kinetic energy on the float decreases accordingly. When the sum of thrust S and buoyancy is equal to the float's own gravity G, the float is in equilibrium and stable at a certain height, and the scale corresponding to that height indicates the flow rate through the flowmeter.
Technical requirements
1. Measurement range: water (2.5-6000) L/h; Air (0.07-2000) m3/h (at 0.101025 MPa, 20 ℃).
2. Accuracy levels: 1.5 and 2.5.
3. Range ratio: 10: 1.
4. Work pressure: DN15～50，4 MPa； DN80～100，1.6MPa。
5. Medium temperature: -80 ℃~200 ℃ (F46 flowmeter with lining 0 ℃~85 ℃).
6. Viscosity of liquid medium: DN15＜5mPa·s； DN25～100＜5mPa·s。
7. Connection methods: flange connection, threaded connection, etc; The flange adopts the GB/T9119.8-10 standard.
8. Total length: DN15-100 250mm.
9. Material of measuring tube: ordinary type 1Cr18Ni9Ti, corrosion-resistant type Cr18Ni12Mo2Ti, 316L, 316 lined F46, etc.
If the user has special requirements, special orders can be placed.
10. Output signal: two-wire system (4-20) mA, three wire system (0-10) mA.
11. Linearity: 1%;
12. Power supply: DC 24 (1 ±) V.
13. Power consumption: 25 mW.
14. Environmental temperature: - 25 ℃ to 55 ℃.
15. Temperature effect: 0.5%/10 ℃.
16. Load resistance: DC (0-10) mA (0-1) k Ω;
(4-20) mA (0-600) Ω.
17. Wiring cable: RVVP 3 × 28/0.15.
18. Explosion proof grade: Exib Ⅱ 2CT5 (certificate number GYB03582U).
19. Safety barrier model: LB906.
20. Electric remote transmission transmitter: K5WI-I type or ESK-I (two-wire system).;
Display diagram of metal tube float flowmeter
3、 Selection instructions:
|
Nominal diameter |
Structural form |
Liquid receiving material |
Additional Structure |
|||
|
A |
B |
Flow direction of medium |
C |
D |
||
|
DN15 |
Y10 |
Down in, up out |
RR0 |
0Cr18Ni12Mo2Ti |
F |
Anticorrosive type |
|
DN25 |
Y20 |
Horizontal entry and exit |
RR1 |
1Cr18Ni9Ti |
T |
Jacket type |
|
DN50 |
Y30 |
Same side entry and exit |
RP |
PTFE (polytetrafluoroethylene) |
Z |
Damping type |
|
DN80 |
Y40 |
Entering and exiting from the opposite side |
Ti |
Titamium (titanium alloy) |
G |
High temperature type |
|
DN100 |
Y50 |
Bottom in and side out |
RL |
316L |
Y |
High pressure |
|
DN125 |
|
|
|
|
B |
Explosion proof type |
|
DN150 |
|
|
|
|
|
|
4、 Converter function combination
|
Converter function combination E |
Function |
|
Es1 |
Remote transmission of 4-20mA standard signal, intrinsic safety explosion-proof, explosion-proof mark iblCT5, safety deletion model LB906 |
|
Es2 |
Remote transmission of 4-20mA standard current signal |
|
K1 |
Equipped with an upper limit alarm point output |
|
K2 |
Equipped with a lower limit alarm point output |
|
K12 |
Equipped with an upper and lower limit alarm point output |
|
JsB |
On site battery power supply, LCD displays instantaneous and cumulative flow, intrinsically safe and explosion-proof |
|
JsC |
220VAC power supply, LCD displays instantaneous flow and cumulative flow |
|
JsD |
24VDC power supply, LCD displays instantaneous and cumulative flow, intrinsically safe explosion-proof |
|
JsE |
24VDC power supply, LCD displays instantaneous and cumulative flow, outputs (4-20) mA standard current signal to transmit instantaneous flow, intrinsically safe and explosion-proof |
Note: The Es1 type transmits the instantaneous flow signal to the angle transmitter through a cam coaxial with the pointer, outputting a proportional linear current signal. The Es2 type is non-contact and outputs a linear current signal proportional to the instantaneous flow rate through magnetic sensors and microcontroller software correction.
5、 Measurement range:
|
orifice （mm） |
Flow range |
Maximum pressure loss |
||
|
Air at 20 ℃ ｍ³/h |
Water L/h |
Air quality （KPa） |
Water （KPa） |
|
|
15 |
0.05～0.5 |
1.6～16 |
7.0 |
6.4 |
|
0.07～0.7 |
2.5～25 |
7.1 |
6.5 |
|
|
0.11～1.1 |
4～40 |
7.2 |
6.5 |
|
|
0.18～1.8 |
6～60 |
7.3 |
6.6 |
|
|
0.28～2.8 |
10～100 |
7.5 |
6.6 |
|
|
0.4～4 |
16~160 |
8.0 |
6.8 |
|
|
0.7～7 |
25～250 |
9.8 |
7.2 |
|
|
1~10 |
40～400 |
10 |
8.6 |
|
|
1.6～16 |
60～600 |
14 |
11.1 |
|
|
|
80～800 |
|
14 |
|
|
25 |
3～30 |
100～1000 |
7.7 |
7 |
|
4.5～45 |
160~1600 |
8.8 |
8 |
|
|
7～70 |
250～2500 |
12 |
10.8 |
|
|
11～110 |
400～4000 |
19 |
15.8 |
|
|
|
500～5000 |
|
16.2 |
|
|
50 |
18~180 |
600～6000 |
8.6 |
8.1 |
|
25～250 |
1000～10000 |
10.4 |
11 |
|
|
40～400 |
1600～16000 |
12.6 |
17 |
|
|
80 |
50～500 |
2000~20000 |
15.5 |
6.3 |
|
75～750 |
2500~250000 |
17.2 |
8.1 |
|
|
100 |
|
4000～40000 |
|
9.5 |
|
|
6000～60000 |
|
10 |
|
|
125 |
|
8000～80000 |
|
16 |
|
|
10000～100000 |
|
20 |
|
6、 Installation size:
|
Caliber/Pressure DN/PN mm/MPa |
size （mm） ΦD |
Φd3 |
ΦK |
Φd2 |
b |
f |
L |
h |
|
15/4.0 |
95 |
45 |
65 |
4×Φ14 |
16 |
2 |
250 |
85 |
|
25/4.0 |
115 |
68 |
85 |
4×Φ14 |
18 |
2 |
250 |
85 |
|
50/4.0 |
165 |
102 |
125 |
4×Φ18 |
20 |
3 |
250 |
85 |
|
80/1.6 |
200 |
138 |
160 |
8×Φ18 |
20 |
3 |
250 |
85 |
|
100/1.6 |
220 |
162 |
180 |
8×Φ18 |
20 |
3 |
250 |
85 |
|
125/1.6 |
250 |
188 |
210 |
8×Φ18 |
22 |
3 |
400 |
85 |
|
150/1.6 |
285 |
218 |
240 |
8×Φ22 |
22 |
3 |
400 |
85 |
7、 Installation
The anti-corrosion metal rotor flowmeter should be installed vertically, and the angle between the centerline of the flowmeter and the plumb line should not exceed 5 °. An inlet straight pipe section with five times the nominal diameter must be ensured upstream, and a 250mm outlet straight pipe section must be ensured downstream. If the medium contains fixed impurities, a filter should be installed upstream of the flowmeter. If the medium contains ferromagnetic substances, a magnetic filter should be installed upstream of the flowmeter. For ease of maintenance and cleaning without affecting production, it is recommended to install a bypass pipeline.
In order to avoid deformation of the flow meter caused by the pipeline, the installation flange must be concentric and parallel to the flow meter, and appropriately support the pipeline to avoid pipeline vibration and reduce the axial load of the flow meter. The control valve in the measurement system should be installed downstream of the flow meter.
When used for measuring gases, it should be ensured that the pipeline pressure is not less than 5 times the pressure loss of the flowmeter to ensure stable operation of the float.
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