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This post was last edited by homkom on 2017-12-15 at 16:07. The gas under test is blast furnace gas; this gas, which contains combustible carbon monoxide, is a low-calorific-value gaseous fuel that can be used as fuel for metallurgical enterprises. Since the medium may contain impurities such as compounds, dust, and particulate matter, the HKB type flow meter specifically designed for gas can be selected depending on the characteristics of the medium being measured. This series of flow meters is available in flange-mounted installation (DN15–DN500 mm), insert-type installation (DN80–DN5000 mm), and online detachable installation (DN200–DN5000 mm). The following are the specific details regarding these flow meters: 1. Product overview and principle: The HKB blast furnace gas flow meter is a type of flow meter designed specifically for measuring media with high viscosity, many impurities, a low Reynolds number, as well as those operating under high or low temperatures and in highly corrosive environments. It provides high accuracy along with excellent stability during measurement, and is highly favored by customers in industries such as coal chemistry and manufacturing. 2. Analysis of product features: (1) The HKB target flow meter has low pressure loss, a wide measurement range, high accuracy, and resistance to interference and impurities. Its sensor does not come into direct contact with the medium, making it highly suitable for measuring flow rates under difficult conditions such as low flow rates, high viscosity, materials that tend to clot or get clogged, high or low temperatures, highly corrosive environments, severe vibrations, and multi-component mixtures. It requires no maintenance throughout its lifetime. (2) It can measure low flow rates of 0.8 m/s; the maximum range is 1:30, with an accuracy of up to 1.0% (accuracy in actual use, while the laboratory accuracy is 0.2%). (3) It features built-in temperature compensation, allowing it to be used in normal conditions as well as at high temperatures of 500 degrees and low temperatures of -100 degrees. Flange connections of sizes DN80 to DN5000 are available; they are of one-piece construction with no moving parts, making installation straightforward. The customer only needs to drill a DN50 hole in the pipeline and weld the flow meter’s short pipe to it to complete the installation process. It is recommended as the preferred choice in applications with large pipe diameters, where the medium contains tar or many impurities, or in humid environments. (4) The nominal pressure range is 0.6–42 MPa; the power supply options include a 3.6 V lithium battery and an external 24 VDC power source; the output types available for selection by the user are 4–20 mA, pulse, 0–5 V, RS485, and HART. 3. Practical Cases (1). Shandong Iron and Steel Rizhao Co., Ltd. purchased our HKB blast furnace gas flow meters. Invite our company’s technical staff to the site to provide guidance on installation and debugging. After operating in ventilation mode, the data showed stability and accuracy, with no significant fluctuations, indicating good performance. (2). Shanxi purchased our company’s HKB-CGCCIDSS-DN700 type target-type gas flow meter. Towards the end of the installation, our company’s technical staff and the on-site manager from the Korean company conducted a final inspection of the work done. (3). Luoyang Ceramic Factory purchased the HKB-CGCCIDSS-DN1000 type online detachable blast furnace gas flow meter. Our company’s technical engineers went to the site to guide the installation and commissioning, ensuring its smooth installation and operation. 4. Maintenance and care: Maintenance of HKB blast furnace gas-type flow meters involves regularly checking their operating condition, keeping close surveillance, and addressing any issues that arise promptly. Before putting this product into operation, it must be carefully inspected to ensure that the flow meter’s wiring is correct and that it is properly grounded before power is applied. Prior to operation, the flow meter’s \"flow zero point\" can be calibrated, and the pipeline can be purged. If it is possible to disassemble it, a full-scale calibration can be performed every 2 years, with no maintenance required. Installation process: 1. Weld the short pipe to the pipeline; 2. Fix the ball valve to the welded short pipe using bolts; 3. Fix the telescopic flow meter device to the ball valve using bolts (note: fix it in the direction indicated by the arrows). 4. After everything is secured, slowly open the ball valve and gradually rotate the flow meter into the pipeline. Once it is in place, align it so that the grooves are in a straight line (ensuring that the target plate faces the direction of the fluid flow), then tighten the 6 locking screws before adjusting the zero point of the instrument. Online detachable flow meters can effectively address various complex operational challenges. In situations where companies need flow meters for measurement but cannot stop the equipment in order to install them, or when existing flow meters need to be replaced or repaired without shutting down the equipment, online detachable flow meters provide a solution to these issues. They help companies save a great deal of resources, offering convenience and speed.