I. Core Advantages

1. Easy and Efficient Installation, Suitable for Space-Constrained Scenarios

   No complex flange fixing is required. The installation can be completed by simply screwing and fastening to the reserved threaded interface of the pipeline, which can be operated by a single person, significantly saving construction time. It is especially suitable for narrow spaces, wall-mounted equipment, or pipeline retrofits, and is frequently used by overseas customers in small production lines and laboratory equipment.

2. Excellent Sealing Performance, Reducing Leakage Risks

   When used with sealing components such as PTFE thread seal tape and gaskets, the contact surface of the threaded connection fits tightly, which can effectively prevent the leakage of conductive liquids (e.g., acid-base solutions, sewage). Compared with flange connections, threaded connections offer more stable sealing performance under low-pressure conditions, and the sealing effect is not easily affected during maintenance disassembly and reassembly.

3. High Measurement Accuracy for Small Calibers, Low Pressure Loss

   Threaded connection electromagnetic flowmeters are usually available in calibers ranging from DN10 to DN50. In this specification, the sensor has a compact structure, ensuring stable fluid flow field during circulation, which reduces eddy currents and uneven flow velocity, thereby improving measurement accuracy. Meanwhile, there are no additional protrusions (such as flange bolts) on the inner wall of the pipeline, resulting in low fluid resistance and pressure loss, making it suitable for scenarios with energy consumption control requirements.

4. Controllable Cost, Adapting to Small-Batch Purchases

   The valve body and connecting parts of threaded connections have a simple structure, with lower manufacturing costs than flange connections, making the product price more competitive. Additionally, the minimum order quantity (MOQ) for small-caliber threaded electromagnetic flowmeters is usually low, meeting the trial order needs of overseas small customers and becoming a popular model for foreign trade promotion in the initial stage.

II. Application Limitations

1. Restricted by Caliber and Pressure, Not for High-Flow and High-Pressure Scenarios

   Due to the limitations of thread strength and sealing performance, the maximum caliber of electromagnetic flowmeters with threaded connections generally does not exceed DN50, and the working pressure is mostly within PN1.6 – PN4.0MPa. It cannot meet the requirements of industrial large-diameter pipelines (e.g., above DN100) and high-pressure pipelines (e.g., outlets of chemical high-pressure reactors), so flange or clamp-on connections are recommended instead.

2. High Requirement for Pipeline Coaxiality During Installation

   If the pipeline is eccentric or the threaded interface is skewed during screw fastening, it may cause uneven force on the sensor, which not only affects measurement accuracy but also may damage the threaded interface. During installation, sufficient upstream (10D) and downstream (5D) straight pipe sections must be ensured, and the sensor should be kept away from vibration sources such as pumps and valves.

3. Maintenance and Disassembly Limited by Space

   If the threaded connection part rusts or adheres after long-term use, special tools are required for disassembly, which is difficult to operate in pipelines with narrow spaces. Compared with the bolt disassembly of flange connections, threaded connections have poorer maintenance flexibility, especially in media with strong corrosiveness, where the thread condition needs to be regularly inspected.

III. Key Supplementary Points for Foreign Trade Adaptation

1. Material Adaptation to International Working Conditions

   The material of the threaded interface can be customized according to the customer’s medium and regional standards. Common corrosion-resistant materials such as 316L stainless steel and Hastelloy are adopted to meet the material requirements of European and American customers in the chemical and food industries. For scenarios with high water quality, carbon steel threaded interfaces can also be provided to control costs.

2. Compliance with International Thread Standards

   Thread standards vary in different overseas regions, so it is necessary to confirm customer needs in advance: European customers commonly use BSPP (British Standard Pipe Parallel), while North American customers prefer NPT (National Pipe Taper). The applicable standards should be clearly marked in the product manual to avoid installation compatibility issues.