Heat transfer oil flow meter

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This post was last edited by gydcm on 2015-6-5 at 16:30. Principle: A heat transfer oil flow meter is designed based on the principle that fluids generate oscillations when flowing under certain conditions, and the frequency of these oscillations is proportional to the flow velocity. When the cross-sectional area through which the fluid flows remains constant, the flow velocity is directly proportional to the volumetric flow rate of the heat transfer oil. Therefore, the flow rate can be determined by measuring the oscillation frequency. 　　Features: Low pressure loss, wide measurement range, high precision; it is hardly affected by parameters such as fluid density, pressure, temperature, and viscosity when measuring volumetric flow rate under operating conditions. There are no moving mechanical parts, thus it offers high reliability and requires minimal maintenance. By using piezoelectric stress sensors, the instrument parameters remain stable over time, and it can operate within a working temperature range of -20°C to +250°C. It provides both analog standard signals and digital pulse signals, making it easy to integrate with digital systems such as computers. It is a relatively advanced and ideal flow meter.

Technical parameters: Complies with the standards Q/320831AHH003-2004 and JB/T6807-93.
Measurement media: Steam, nitrogen.
Flange-mounted versions are available in diameters of 25, 32, 40, 50, 65, 80, 100, 125, 150, 200, 250, 300. Flange-connected versions also come in these diameters. Insert-type versions are available in diameters of 300, 400, 500, 600, 800, 1000.

Flow measurement range: The normal flow velocity range corresponds to a Reynolds number of 1.5×104 to 4×106; for gases, it’s 550 m/s; for liquids, it’s 0.5 to 7 m/s. The specific flow velocity ranges for liquids, gases, and other media are shown in Table 2, while those for steam are given in Table 3.
Measurement accuracy: 1.0 grade or 1.5 grade.
Temperature of the measured medium: Normal temperature range –25°C to 100°C; high temperature range –25°C to 150°C; extreme temperature range –25°C to 250°C.
Output signals: 4–20 mA, with a transmission distance of up to 1000 meters (when the load resistance is ≤750). It also supports 485 communication and frequency output.

Operating environment: Temperature: –25°C to +55°C; Humidity: 5% to 90%.
Materials: Stainless steel, aluminum alloy.
Power supply: DC24V or 3.6V lithium battery.
Explosion protection rating: Exd II BT4.
Protection rating: IP65.

Applications: Primarily used for measuring the flow rate of fluids in industrial pipelines, including steam, ethane, methane, natural gas, carbon dioxide, neon, as well as various liquids and vapors. 　　Selection: Code, Flow Rate Range (m²/h), HPLUG-25DN25: 1~12 (liquid), 10~100 (gas); HPLUG-32DN32: 1.5~23 (liquid), 15~150 (gas); HPLUG-40DN40: 2.4~32 (liquid), 22.6~150 (gas); HPLUG-50DN50: 4~50 (liquid), 35~350 (gas); HPLUG-65DN65: 6.3~184 (liquid), 60~600 (gas); HPLUG-80DN80: 10~130 (liquid), 90~900 (gas). Note: 1. For steam flow rates, refer to Table 3. HPLUG-100DN100: 20~200 (liquid), 140~1400 (gas). 2. Models from DN250 to DN600 can be ordered according to customer requirements. HPLUG-125DN125: 31~310 (liquid), 220~1450 (gas). 3. For diameters above DN300, insert-type vortex flow meters are recommended; these can also be customized. HPLUG-150DN150: 45~450 (liquid), 300~3000 (gas); HPLUG-200DN200: 80~800 (liquid), 550~5500 (gas); HPLUG-250DN250: 150~1500 (liquid), 880~8800 (gas); HPLUG-300DN300: 200~2000 (liquid), 1300~13000 (gas); HPLCG-300DN300: 100~1500 (liquid), 1560~15600 (gas); HPLCG-400DN400: 180~3000 (liquid), 2750~27000 (gas); HPLCG-500DN500: 300~4500 (liquid), 4300~43000 (gas); HPLCG-600DN600: 450~6500 (liquid), 6100~61000 (gas); HPLCG-800DN800: 750~10000 (liquid), 11000~110000 (gas); HPLCG-1000DN1000: 1200~1700 (liquid), 17000~170000 (gas). Code, Function 1: N – without temperature and pressure compensation; Y – with temperature and pressure compensation. Code, Output Type: F1 – 4-20mA output (two-wire); F2 – 4-20mA output (three-wire); F3 – RS485 communication interface; F4 – frequency output. Code, Medium Being Measured: J1 – liquid; J2 – gas; J3 – steam. Code, Connection Method: L1 – flange-mounted; L2 – flange-connected; L3 – insert-type. Code, Function 2: E1 – Class 1.0; E2 – Class 1.5; T1 – normal temperature; T2 – high temperature; T3 – steam; P1 – 1.6 MPa; P2 – 2.5 MPa; P3 – 4.0 MPa; D1 – internal 3.6V power supply; D2 – DC24V power supply; B1 – stainless steel; B2 – carbon steel. Installation Requirements for Heat Transfer Oil Flow Meters: 1. Heat transfer oil flow meters can be installed indoors or outdoors. If it is installed in a well where flooding is possible, a submersible sensor or transmitter should be chosen. 　　2. The heat transfer oil flow meter can be installed horizontally, vertically, or at an angle on the pipeline, but when measuring liquids, the pipeline must be filled with liquid. Therefore, when installing a vortex flow meter in a vertical or inclined pipe, the flow direction of the liquid should be from bottom to top. 　　3. A long straight pipe section should be provided on the upstream and downstream sides of the heat transfer oil flow meter; the required length of these straight pipe sections varies depending on the conditions of the pipeline. It is advisable to avoid installing control valves or partially open valves upstream of the vortex flow meter; such valves should be placed 5D downstream of the flow meter. 　　4. The inner diameter of the pipeline in which the heat transfer oil flow meter is installed must be identical to the inner diameter of the flow meter; otherwise, a diameter change is required. 　　5. When designing the pipeline, at least 500 mm of space should be left at the top of the sensor or transmitter to facilitate debugging and maintenance. http://www.huapuyibiao.com/d/file/p/zhengqi/2014-07-31/a08d2505a2cfa53a473f8f41ca5a1e9f.jpg