Cyw-152b and cyw-153b stainless steel differential pressure meter (hereinafter referred to as differential pressure meter) is suitable for measuring various liquid (gas) body medium's differential pressure, flow and other parameters in the process flow of chemical industry, chemical fiber, metallurgy, electric power, nuclear power and other industrial sectors. Stainless steel differential pressure gauge structure is all made of stainless steel, in which the measuring system (double bellows and connecting parts), pressure guide system (including joints, pipes, etc.) is made of special austenitic stainless steel, with strong corrosion resistance and resistance to the erosion of the working environment. The overall structure design of the instrument is reasonable, the technology is advanced, has the advantages of small volume, light weight, good stability, long service life, novel appearance, strong adaptability and so on. The connection form of instrument joint has parallel type (can connect directly with three-valve group) and inclined type two, can adapt to different users' matching installation. ■ structure principle: the instrument adopts double bellows structure, that is, two bellows are installed in the symmetrical position on both sides of the "shape" bracket. The upper and lower ends of the "h" type bracket are respectively the movable end and the fixed end, and the middle part is connected by a spring plate; The two bellows are in parallel state, respectively connected with the high and low pressure joint on the case by conduit; The gear driving mechanism is directly mounted on the fixed end of the bracket and connected with the movable end of the bracket by a tie rod. The dial is directly fixed on the gear drive mechanism. Instrument working principle: based on the sensing element adopted two have the same stiffness of the bellows, and so on under the same measured medium forced it to produce the same focus respectively on the legs, because of the spring leaf waiting for a moment on both sides do not produce immunity, so the stent is still in the original position, the gear transmission mechanism is not action, make the pointer still refers to the zero. When different pressures are applied (generally the high end is higher than the low end), the forces exerted by the two bellows on the movable support are not equal, which causes corresponding displacements respectively, drives the gear drive mechanism to drive and magnifies, and indicates the differential pressure value between the two after the pointer is deflected. ■ main technical indicators: 1. Measurement range of differential pressure, nominal working pressure, accuracy level and joint thread size:

2. Materials such as pressure guide system and shell:

6. The technical performance of the instrument conforms to the enterprise standard Q/ yxbm831-1997 stainless steel differential pressure meter. 7