Xi'an Yunyi Instrument Co., Ltd
Xi'an Yunyiyibiao Instrument Co., Ltd. is a national high-tech enterprise, specializing in the R&D, production and sales of pressure transmitter,level meter, flow , temperature instrument and
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Precision in Harsh Environments: YK-M4 Threaded Diaphragm Pressure Gauge
The YK-M4 Diaphragm Pressure Gauge is a highly specialized instrument designed for measuring the pressure of challenging media that would damage or clog a standard pressure gauge. It employs an indirect measurement structure, where the process medium acts upon a flexible, corrosion-resistant diaphragm. This diaphragm then transmits the pressure hydraulically to the internal measuring mechanism of the gauge (typically a Bourdon tube system), which is filled with a neutral fluid. This critical separation ensures that the sensitive movement of the gauge is completely isolated from the process medium.
This design makes it the ideal solution for applications involving highly viscous, corrosive, easily crystallized, or high-temperature media. By selecting the appropriate diaphragm and seal materials, the gauge can be customized to withstand aggressive chemical environments and harsh operational conditions, ensuring long-term accuracy and reliability. Available in various dial sizes and connection types, it offers a robust and versatile pressure measurement solution for demanding industrial processes.
The key technical parameters of the YK-M4 Diaphragm Pressure Gauge are summarized in the table below:
| Parameter | Specifications |
|---|---|
| Accuracy Class | 1.0 ; 1.6 ; 2.5 |
| Measuring Range | 0 ~ 0.1 MPa to 0 ~ 160 MPa |
| Diaphragm Material | OCr17Ni12Mo2 (316), Monel (Cu30Ni70), Hastelloy (H276C), Tantalum (Ta), Fluoroplastic (F4) |
| Flange Material | Stainless Steel (316), Plastic-Lined Stainless Steel (316 + F4) |
| Sealing Gasket Material | Nitrile Rubber, Fluorine Rubber, Silicone Rubber, Fluoroplastic |
| Thread Connection | M20 * 1.5, G3/8", G1/2" (Customizable) |
| Dial Size (DN) | 60 mm, 100 mm, 150 mm |
| Temperature | Ambient & Medium (Standard): -25 ~ +55 °C Medium (High-Temp Type): 0 ~ 600 °C |
| Working Pressure | Static Load: Up to 3/4 of scale max Alternating Load: Up to 2/3 of scale max |
Applicable Scenarios
The primary strength of the diaphragm pressure gauge lies in its ability to handle difficult media that are problematic for conventional gauges. Its typical application scenarios include:
Corrosive Media: In chemical processing, petrochemical, and pharmaceutical industries, it reliably measures the pressure of acids, alkalis, and other aggressive chemicals. The use of diaphragms made from Hastelloy, Tantalum, or Fluoroplastic provides exceptional corrosion resistance.
High-Viscosity or Slurry Media: For substances like heavy oils, paints, resins, pulp, and mud, the smooth diaphragm surface and flush-mounted design prevent clogging and ensure the medium flows freely without solidifying in the pressure port.
Crystallizing or Particulate Media: In applications involving syrups, molten salts, or granular solids, the diaphragm seal prevents crystals or particles from entering and blocking the gauge mechanism, a common failure point for standard gauges
High-Temperature Processes: The availability of a high-temperature model (up to 600°C) makes it suitable for applications in power generation, boiler systems, and industrial heating processes where media temperature is extreme.
Sanitary Applications: With specific material choices and a smooth, cleanable diaphragm surface, it can be configured for use in the food and beverage or biotechnology industries where hygiene is critical.