How to Choose the Connector of Diaphragm Pressure Gauge

How to Choose the Connector of Diaphragm Pressure Gauge

Diaphragm pressure gauges are essential instruments in many industrial applications, mainly used to measure the pressure of corrosive, viscous, high-temperature or easily crystallized media. Choosing the right connector not only ensures the accuracy and durability of the gauge, but also improves the overall performance and safety of the system. This article will detail the key factors and best practices for diaphragm pressure gauge fitting selection.

I. Basic Types of Diaphragm Pressure Gauge Fittings

When selecting a diaphragm pressure gauge fitting, you first need to understand the different types of fittings and their respective advantages and disadvantages. Common types of fittings include:

  1. Threaded fittings: Usually used for standard industrial applications, with the advantages of easy installation and low cost. Common thread standards include NPT (National Pipe Thread), BSP (British Standard Pipe), and G thread.
  2. Flange Fittings: Suitable for high pressure, large diameter or require high sealing performance occasions. Common flange standards include ANSI, DIN, JIS, etc.
  3. Clamp Fittings: Usually used in sanitary applications, such as food, pharmaceutical industry, easy to clean and disassemble. Standards are ISO, DIN, 3A, etc.
  4. Quick couplings: For applications requiring frequent disassembly and replacement, with the advantages of easy and quick operation.

Ⅱ. The Key Factors in the Choice of Connector

When selecting the connector of diaphragm pressure gauge, the following key factors need to be considered:

  • Medium properties

Different media (such as corrosivity, viscosity, temperature, crystallinity, etc.) have different requirements for joint materials and design. For example, corrosive media need to choose corrosion-resistant materials, such as stainless steel, Hastelloy, titanium and so on.

  • Working Pressure and Temperature

Fittings must be designed to withstand the maximum working pressure and temperature of the system. High-pressure applications usually require the selection of flanged fittings or special high-pressure threaded fittings.

  • Connection Method

Choose the appropriate connection method according to the actual installation requirements of the equipment. Threaded fittings are suitable for simple, low-cost installations, while flanged fittings are suitable for applications requiring high sealing.

  • Standards and Norms

Ensure that the joints comply with the relevant industry standards and norms, such as ANSI, DIN, ISO and so on. This not only ensures product quality, but also facilitates interchangeability and maintenance with other equipment.

  • Cleaning and Maintenance

In sanitary applications, cleaning and maintenance of fittings is critical. Clamp fittings and quick release fittings are often better suited for these applications because they are easy to disassemble and clean.

Connector of Diaphragm Pressure Gauge

Ⅲ. Common Application Scenarios and Fitting Options

The following are several common application scenarios and the corresponding fitting selection recommendations:

  • Petrochemical industry

Since the medium is usually corrosive and the working environment is complex, it is recommended to choose threaded fittings or flange fittings made of corrosion-resistant materials (e.g. stainless steel, Hastelloy). At the same time, high temperature and high pressure working conditions should be taken into account, select the joints in line with the relevant standards.

  • Food and pharmaceutical industries

High hygiene requirements, it is recommended to choose sanitary clamp fittings or quick couplings, the material is usually stainless steel. At the same time, the joint design should be easy to clean and disassemble to avoid media contamination.

  • Water treatment and environmental protection industry

For less corrosive media, you can choose economical stainless steel threaded fittings. If the medium contains particles or easy to crystallize, you can choose flange fittings for easy cleaning and maintenance.

  • Refrigeration and air-conditioning systems

Fittings with high pressure resistance are required, and it is recommended to choose high-pressure threaded fittings or flange fittings. For special refrigerants, you should select corresponding corrosion-resistant materials.

Ⅳ. The Choice of Joint Material

The choice of joint material is crucial to the performance and life of the diaphragm pressure gauge. Commonly used joint materials include:

  1. Stainless steel: Good corrosion resistance, suitable for most industrial applications.
  2. Hastelloy: Excellent corrosion resistance, suitable for strong corrosive media.
  3. Titanium alloy: Lightweight and high strength, excellent corrosion resistance, suitable for special applications.
  4. Carbon steel: Lower cost, but poor corrosion resistance, suitable for general non-corrosive media.

V. Actual Case Study

Selecting the proper diaphragm pressure gauge fitting is critical to ensuring measurement accuracy, equipment durability and system safety. When selecting fittings, you must consider the combination of media properties, operating pressures and temperatures, connection methods, industry standards and codes, and cleaning and maintenance requirements. The performance and service life of diaphragm pressure gauges can be significantly enhanced through proper fitting selection, ensuring reliable operation of industrial systems.

As a professional manufacturer of diaphragm pressure gauges, we are committed to providing our customers with high quality products and comprehensive technical support. If you have any questions about selecting fittings or need customized solutions, please feel free to contact us. We will provide you with the best fitting selection suggestions and technical support according to your specific needs, ensuring that your system always runs in the best condition.

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