FISHERMETER. Swirl flowmeter FVST4. liquid gas steam

Transcription

1 Swirl flowmeter FVST4 liquid gas steam

2 Contents 1 Characteristics 2 2 Measurement principle 2 3 Technical parameter 3 4 Installation 4 5 Dimensions 10 6 Meter size and flow range 11 7 Flowmeter selection 13 1

3 1. Characteristics Fishermeter VTS Series swirl flowmeter is made with a number of new technologies, both in the software and hardware featuring high accuracy and operational reliability. VTS Series swirl flowmeter can measure gas, liquid and steam in wide range, independent of the physical properties of the medium. In the design and operation it has the following features: 1. No moving parts, no wear, no mechanical maintenance. 2. Optimized blade angle and streamlined guide surface make the flow spiral more smoothly minimizing the pressure loss. 3. Widely used in measuring all types of medium such as gas, liquid and steam, applicable for measurement of low-density gases such as hydrogen and low-pressure gas 4. Full range of meter sizes and wide measuring span. 5. Unique dual piezoelectric ceramic sensor technology 6. Special materials available, such as H.C 7. Dual-sensor design available effectively improving operation reliability 8. DSP technology for more measurement stability 9. Super high pressure design up to 42MPa 10. Optional integrated temperature and pressure compensation 2. Measurement principle A turbine-shaped inlet section forces the axial flow entering the flowmeter into a rotational movement. A vortex core forms in the centre of the primary rotation. A secondary rotation forms in the vortex core producing thread-like spirals. The frequency of this secondary rotation is linearly proportional to the flowrate over a wide Reynolds Number range. Pressure variations resulting from the secondary rotation are detected by a piezo sensor and converted into electrical pulses. These pulses are processed in the DSP converter into scaled analog and digital signals.(fig.1) (Swirler) (Deswirler) 2

4 3. Technical parameter Item Parameter Nominal Diameter (mm) Nominal pressure (MPa/LB) Medium temperature Medium viscosity Temperature compensation Redundancy design Body material Connection type DN15 ~ DN500(1/2 ~20 ) 1.6MPa,2.5MPa,4.0MPa, 6.3MPa,10.0MPa,16.0MPa,25.0MPa Class 150,Class 300,Class 600,Class 900,Class 1500,Class ~ +320 DN15(1/2 ) to DN 32(1-1/4 ) No higher than 5 MPas DN40(1-1/2 ) to DN 50(2 ) No higher than 10 MPas Above DN80(3 ) No higher than 30 MPas Optional, capable of measuring mass or N volumetric flow rate Optional,Dual probes and converters. 304SS,316L,other materiasl supplied upon agreement. Flange Accuracy ±1.0% ±0.5% Measuring range ratio (General) Straight run pipe Power Output Communication EX-design Protect grade Applicable medium 1:25 Inlet 3D and outlet 1D (D = diameter of meter body) Battery power:3.6vdc Supplied power: 12~28 VDC 4~20mA,Pulse HART,RS485(MODBUS PROFIBUS-PA) Ex ia II CT5, Ex d II CT5 IP65,IP67,IP68 Gas, Liquid, Steam Ambient Condition Temperature -30 ~ +60 Relative humidity 5% ~ 90% Atmospheric pressure 86 ~ 106 KPa 3

5 4. Installation Installation location and method will directly affect the flowmeter measurement. Improper installation will influence measuring accuracy, decrease the service life or even cause permanently damage to the flow meter. Installation should observe the following requirements: 4.1 Preparation before installation Check the flow meters in package referring to the packing list and report if there is any damages on them Make sure the pipeline is ready and locate installation position according to the following instructions Confirm the technical personnel are healthy to perform fixing work and get necessary tools available. 4.2 Installation procedures Fix companion flanges, gaskets and flow meter together with bolts (Figure 2), but not in final tight. If the companion flanges, bolts and gaskets are provided by the user, make sure that their size and pressure standard in conformity with the flow meter. Our technical engineer can help you in this regard. Fig Join the connected flow meter with the pipeline, and make sure the flow direction is same as the arrow mark on the meter body. Weld the companion flanges on the pipeline (Figure 3). generally only four evenly distributed welding spot. Attention:Flow meter and pipeline In one axial direction 4 welding points fixed the flange and pipeline % Fig.3 4

6 4.2.3 Remove the flow meter and gaskets, firmly complete the welding. (Fig. 4) Fig If the pipeline needs to be cleaned with air or other cleaning detergent, put in a pipe section with the same geometric size as flow meter first, and then clean the pipeline. Replace the substitute pipe with flow meter after cleaning finished. Attention: Never try to clean or purge the pipeline with flowmeter online 4.3 Installation notes The requirements on inlet and outlet straight run section Thanks to the special working principle of swirl flowmeter, the required length of inlet and outlet straight run pipe is quite shorter, but during the installation, do ensure that the minimum length must be guaranteed (as Figure 5). Otherwise it will seriously affect the measurement accuracy, and even lead to malfunction of the swirl flow meter. Fig. 5 5

7 4.3.2 Installed in high temperature working condition When temperature is higher than 180 for horizontal installation, the remote type is highly recommended, or lateral mounting shall be used with an angle between 45 ~60 from vertical to horizontal, as shown in Figure 6. Otherwise high temperature may damage the electronic part. Fig Installation in steam pipeline When steam or moisture is measured, the flow meter is to be installed in high point or down-to-up pipe section, as shown in Figure 7. At low point and up-to-down section shown in Fig 8, steam and moisture are easy to condense to form two-phase medium, which will cause inaccurate or failed measuring. Besides, in case liquid exists, supply of steam may cause water hammer, resulting in flow meter. Figure 7 Figure 8 6

8 4.3.4 Installation in liquid pipeline When liquid is measured, the pipeline must be full of medium, with meter mounted in low point of the pipeline, shown in Figure 9. At high point of the line as shown in Figure 10, bubbles tend to exist, which serious affect the accuracy of measurement. When meter has to be installed vertically, the fluid must flow upwards, as shown in Fig.11, and otherwise pipe cannot be filled full. Fig. 9 Fig. 10 Fig. 11 7

9 4.3.5 Insulation If flow-valued pipe has to be insulated, the thickness at the flow meter cannot exceed 50mm, shown Fig.12. The excessive insulation may result in rise of temperature, leading to the damage of the converter. Thickness less than 50mm Fig Maintenance space 200mm space above the converter must be reserved for routine maintenance and disassembly, shown in Figure mm Fig The flowmeter should be installed in a place free from vibration that will interfere with the stable measurement. If necessary, provide support for both sides of the flow meter or apply flexible connection between flow meter and source of vibration There should be a shut-off valve prior to the flow meter and close the valve to stop the flow inside the pipe. Only the control valve placed at the outlet of the flow meter is to be used to control the volume of the flow rate. If there is no flow in pipe, pressure may fluctuate which may cause error signal, so such a case ought to be avoided In case steam and liquid are both in the medium to be measured, a separator is necessary for accurate metering. 8

10 4.4 Installation of remote type swirl flowmeter The installation of the senor meter is the same as the one of compact type swirl flowmeter. The converter shall be fixed firmly onto wall or mounted in a cabinet. The maximum data-communication length between the converter and senor part is 10 meters and the shorter the shielded cable is, the smaller the interference is. So in accordance with the actual distance, cut off the excessive cable. Because the signal from the sensor to the signal converter is not amplified, signal is vulnerable to interference during transmission. the cable shield should be grounded together with power s ground. After the wiring work is complete, fix the cable in wire channel, shown in Fig. 14. Fig Installation with temperature and pressure compensation The installation of swirl flow meter with temperature and pressure compensation function is recommended as shown in Fig. 15. Fig. 15 9

11 5. Dimensions H d1 All units in mm Nominal diameter Length Height Tube diameter DN L H d

12 6. Meter size and flow range Gas flow range(operating) N. Diameter(mm) Min. flow rate(m 3 /h) Max. flow rate(m 3 /h) Remarks Ambient conditions: Temperature T 0 =20 Absolute pressure P 0 =0.1013MPa Density ρ 0 =1.205kg/m 3 Viscosity υ 0 = m 2 /s Density table of general gases Gas Density(kg/m 3 ) Gas Density(kg/m 3 ) Dry air Hydrogen Acetylene Methane Ammonia gas Ethane Oxygen Propane Carbon monoxide Butane CO Nitrogen Fluoride Neon Ethene NO Propylene NO

13 Liquid flow rate N. Diameter(mm) Min. flow rate(m 3 /h) Max. flow rate(m 3 /h) Remarks (1)Liquid: water (2)Ambient conditions: Temperature T0=20 Density ρ0=1000kg/m 3 (3)Normally the maximum flow velocity 7m/s Density table of general liquids Liquid Density(kg/L) Liquid Density(kg/L) Gasoline Water(0 ) Ether Water(2 ) Petroleum Water (4 ) Alcohol Water (18 ) Methyl(0 ) Water (20 ) Kerosene Water (40 ) Terebinth Water (60 ) Benzene Water (100 ) Lubricant 0. 9~0. 93 Milk Ammonia Acetic acid Seawater Mercury

14 7. Flowmeter selection Order model FVTS X X X X X X XX X X X X X X X X X X X XX XX Series Standard 4 Connection Flange 1 Type of converter Compact 0 Remote 1 Medium Liquid 0 Gas 1 Steam 2 Natural gas 3 Sensor & swirler material SS304 A SS316 B HC C TI D Others M Tube material SS304 P SS316 Q HC R TI S Others Y Diameter DN 15 1/2 15 DN 20 3/4 20 DN DN /4 32 DN /2 40 DN DN /2 65 DN DN H DN Q DN F 13

15 DN H DN F DN H DN H DN H Pressure rating PN 1.6 A PN 2.5 B PN 4.0 C PN 6.4 D PN 10.0 E PN 16.0 F PN 25.0 G PN 42.0 H ANSI 150LB J ANSI 300LB K ANSI 600LB L ANSI 900LB M ANSI 1500LB N ANSI 2500LB P Others Z Probe type Standard ( ) 0 High temperature ( ) 1 Super temperature ( ) 2 Probe sealing Graphite 0 PTFE 1 Others 9 Explosion proof None A ExiaIICT5 B ExdIICT5 C Data communication None 0 HART 1 RS485 2 Cable connector M20*1.5 A 14

16 1/2NPT B Material of cable connector Standard(plastic) 1 Stainless steel 2 Brass 3 Material of converter body Cast aluminum(standard) A Stainless steel(optional) B Accuracy ±0.5% A ±1.0% B Protection grade IP65 1 IP67 2 IP68 3 Name plate language Chinese 1 English 2 Power supply 24VDC 12VDC Battery 3.6V Redundancy design Dual sensors with one converter Dual sensors with two converters S1 S2 S3 R1 R2 15

17 Safety Statement Prior to delivery, the flowmeter has undergone stringent pressure test and calibration, and it will be kept well in our factory packing during transportation. Please observe this manual to avoid any inconveniences that may be caused by any abnormal treatment. All parameters and total flow data will be stored in the converter. When the power is resumed, the flow meter will run immediately as it does before the power-off. Instruction for applicable industries. Medium Swirl flow meter can be used to measure gas, liquid and steam, but the medium must be the same as agreed when the flowmeter is ordered. The medium must not be corrosive chemically and physically to flowmeter including its body, swirler, probe and deswirler. If there is new medium other than the agreed, it must be quiet assured that it will not damage the meter. If not, please consult our company engineer. The temperature and pressure rating showed on the name plate should be not be surpassed in its application. The flow meter cannot be installed on line until cleaning process by either steam or pneumatic air is completed. Follow the requirements on installation ambience for swirl flow meter. The meter should be installed in the environment away from electric motor, transformer and electromagnetic interference. The flowmeter should be installed in a place far from vibration. If necessary, provide fixed support for both sides of the flow meter or apply flexible connection between flow meter and source of vibration. Following actions to be avoided Take the flowmeter as compensation for the insufficiency of pipe length or angle deviation. Stand on it or use it for supporting weight. Strike other thing with the flow meter. Treat the meter by striking, drilling and welding. Paint the name plate. 16

18 Contact us Once a quotation inquiry is received, a regional sales representative will contact you within 24 to 48 hours. International Sales Department Tel: Fax: sales@fishermeter.com Technical Service Tel; / / 606 Fax: service@fishermeter.com Office Address Beijing Fishermeter Instrument Co., Ltd. Post Code: Room 1204, B Block Fortune Center, Tianlang Garden, Beiyuan Road, Chaoyang District, Beijing, China. (100107) Factory Address 1 st building, Mauhwa Industry Park 1st block, Caida 3rd street, Caiyuan Industry Park, Nancaizhen Town, Shunyi District, Beijing, China.