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technical article
Metal tube float flowmeter for liquid measurement in closed pipelines
2012-3-10 14:47:15

用于封闭管道中液体、气体或蒸汽的流量测量,在过程控制中的广泛应用,特别适合中小流量的控制和测量。 HSB-LZ series metal tube float flowmeter is used to measure the flow of liquid, gas or steam in closed pipelines. It is widely used in process control, especially suitable for small and medium flow control and measurement.
It consists of a cone, a float, an indicator, and a converter. When the fluid flows into the cone float and rises, when the lift M is balanced with the gravity G, the displacement of the float is transmitted to the indicator to indicate the flow rate through the magnetic steel or converted by the converter into the corresponding electrical signal (two-wire system 4-20mA, three-wire system). 0-10 mA, 4-wire 4-20 mA, 0-20mA) can be combined with DDZ-Ⅱ, DDZ-Ⅲ type electric unit combination meters, I series, EK series and other meters, and can also be networked with a computer to achieve flow Long distance display, record, adjust, accumulate and control.
1. Reasonable design and reliable operation. The indicator part is a maintenance-free component, which is resistant to corrosion, high temperature and high pressure, dust-proof, drip-proof and explosion-proof.
According to the user's requirements, it can indicate the standard state flow rate and the actual working state fluid flow rate (according to the user's calculation, the flow rate, temperature, density, pressure and other parameters are calculated by the computer). It can also be used for 2-3 scale instructions, output signals and scales. Consistent and linear.
2. Output analog signal 0-10mA, 4-20 mA or 0-20 mA can be equipped with our factory analog signal-frequency converter, output frequency signal and display cumulative flow.
3. There are various forms of structure and dimensions for connecting the pipeline and the flow sensor. For the convenience of design institute design, the installation height of the basic flow sensor is 250mm, and the installation height of the filter is 100mm and 50mm. It can also be customized according to customer requirements.
流量传感器除基材1Cr18Ni9Ti外亦可选用0Cr18Ni9Ti ; 0Cr18Ni12Mo2Ti(钼二钛);镍基合金(hastelloy哈氏合金) 4. In addition to the base material 1Cr18Ni9Ti, 0Cr18Ni9Ti; 0Cr18Ni12Mo2Ti (molybdenum dititanium); nickel-based alloy (hastelloy)
Such as 0Cr16 Ni60Mo16W4; lined with polytetrafluoroethylene (PTFE) 4F or 46F, glass, rubber, etc.
5. Each performance index is not lower than similar foreign products.
6. The high temperature resistance of the flowmeter can reach 400 ℃, and the small-diameter pressure resistance can reach more than 10MPa.
7. In order to prevent the error caused by the jump of the float when measuring gas or steam, a damper is specially designed, which can also be applied to the measurement of larger pulsating fluids.
8. The inlet and outlet positions of the flowmeter are: bottom-up; left-right (flat); right-left (flat); bottom-up horizontal; bottom-up horizontal;
9. According to the user's needs, there are indication type; remote transmission; upper and lower limit alarm devices; on-site cumulative display; insulation; cooling jacket; and various specifications and filters are available. The installation height can be determined by the customer.
10. Our company specializes in producing various special specifications and special purpose flowmeters for customers. Please contact us.
技术参数 Technical parameters of metal tube float flowmeter

See Table 1 for measuring range
Range ratio: 10: 1; (up to 15: 1 according to users)
Accuracy level: 2.5; special 1.5;
Pressure loss: 6.5KPa -38.2KPa
Fluid temperature: -80-400 ℃ (lined fluoroplastic is -80-+ 90 ℃)
Fluid viscosity: 15≤5mPa? S; 25-150≤300mPa? S
Working pressure: 1.6MPa, 2.5 MPa, 4.0 MPa, 6.3 MPa (≥10 MPa)
Connection method: flange connection (for thread connection, please consult with the manufacturer)
Press JB81-59; JB82-59
Output electric signal: 4-20mA for two-wire system and 0-10mA for three-wire system.
Power supply voltage: 24V ± 20% DC (no effect with output)
Power consumption: about 25mA
Electric signal temperature effect: 0.5% / 10 ℃
Load resistance: 0-10mA, 0-1.2kΩ; 4-20mA, 0-500Ω
Connection cable: RVVP3 × 28 / 0.15; 2 × 28 / 0.15; 4 × 28 / 0.15
Anti-riot grade: intrinsically safe type: ibⅡCT5, with safety barrier LB830S
Flameproof: dⅡBT5
Sensor connection height: standard type is 250mm
Magnetic filter height: standard type: 100mm (can also be determined by the user)
Sensor installation form: base type is 250mm (can also be determined by the user)
Indicator anti-corrosion category: dust-proof and drip-proof (equivalent to IP65)
Alarm main technical performance:
1. Working voltage: 12V ± 10%; low level ≤ 4V, high level ≥ 9V
2.5 A pair of 5A 125V / 3A 250V normally closed and normally open contacts.
Transmission distance: 1Km (metal shielded wire) wire resistance is not greater than 100Ω