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Stainless steel diaphragm pressure gauge is designed to enable universal pressure instruments to be suitable for measuring the pressure of media with strong corrosion, high temperature, high viscosity, easy crystallization, easy solidification, and solid suspended matter. It is also necessary to avoid direct entry of the measuring medium into the universal pressure instrument and to prevent sediment accumulation and easy cleaning. Therefore, a system consisting of a diaphragm isolator and a universal pressure instrument must be used.
It is mainly used for measuring the pressure of fluid media in the production processes of industrial sectors such as petrochemicals, alkali production, chemical fibers, dyeing, pharmaceuticals, food, and dairy production.

●structural principle

The stainless steel diaphragm pressure gauge consists of various universal pressure instruments and diaphragm isolators of different structures, forming a closed system filled with sealing fluid. When the pressure of the measured medium acts on the diaphragm, the diaphragm deforms and compresses the sealing liquid in the closed system. Due to the inherent properties of the sealing fluid, the elastic elements in the pressure instrument undergo corresponding elastic deformation and displacement, and the pressure value is displayed by the indicator device. When the stiffness of the diaphragm is small enough, the pressure indicated by the pressure gauge is close to the pressure value of the measured medium.

●Example of Model Marking

The universal instrument Y-100B/SR/MF (A)/316/4Mpa/50-4.0HGJ46 is a Y-100B stainless steel pressure gauge with SR heat dissipation connection. It adopts an open convex flange MF, the isolator (flange) material is carbon steel, the diaphragm material is 316 stainless steel, the measurement range is 0-4Mpa, and the flange standard is 50-4.0HGJ46.

●Diaphragm device flange size

1. Open convex flange
2. I-shaped convex flange
3. Screw joint type [code ML] range upper limit value: ≤ 60MPa (see Figure 5)
4. Bolt type diaphragm isolator [code MZ] Measurement range: 1-25MPa Diaphragm and diaphragm seat material: OCr17ni12Mo2 [316] (see Figure 6)
5. Clamp type diaphragm isolator [code MC] 6. Nut type diaphragm isolator [code MN] 7. Rectangular flange type diaphragm isolator [code MH]