Analyzing the structural principle of stainless steel differential pressure gauges

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Stainless steel differential pressure gauges are suitable for use in the process streams of industrial sectors such as chemicals, brazing, metallurgy, power generation, and nuclear power to measure parameters such as differential pressure and flow rate of various liquid (gas) media. The entire instrument structure is made of stainless steel. The measurement system (double-bellows quick-connect components) and the pressure transmission system (including connectors, conduits, etc.) feature a special design with advanced manufacturing techniques; they offer advantages such as small size, light weight, good stability, long service life, an attractive appearance, and strong adaptability. The connection types for instrument connectors are parallel (which can be connected directly to the three-valve assembly) and inclined; pressure transmitters can be adapted for installation in conjunction with various customer systems. The gauge features a dual-bellows structure, with two bellows installed at symmetric positions on either side of the \"I\"-shaped bracket. “The upper and lower ends of the ‘I’-shaped frame are the movable end and the fixed end, respectively, with a spring plate connecting them in the middle ； The two bellows are connected to the low-pressure connectors on the case, while the gear transmission mechanism is directly mounted at the fixed end of the bracket. and is connected to the movable end of the bracket through a tie rod ； The dial is directly fixed to the gear drive mechanism. When different pressures are applied (usually higher at the high-pressure side than at the low-pressure side), the forces exerted by the two bellows on the movable bracket are not equal; this results in separate displacements, which in turn drive the gear transmission mechanism to amplify the force, and the resulting differential pressure value is indicated by the deflection of the pointer.