Diaphragm pressure gauges have become an irreplaceable choice in many fields with special medium requirements due to their
unique isolation design. The following are its detailed usage scenarios and fields, which usually involve harsh working conditions
that ordinary pressure gauges cannot cope with.
Application scenarios divided by industry sectors
1. Chemistry and Petrochemical Industry
This is the most classic application field of diaphragm pressure gauges. The medium usually has strong corrosiveness,
flammability, explosiveness, or high purity requirements.
Application areas: Pressure monitoring of reaction vessels, distillation towers, pipelines, and storage tanks.
Measurement media: various strong acids (such as sulfuric acid, hydrochloric acid), strong bases (such as sodium hydroxide),
organic solvents, chlorine gas, polymer monomers, etc.
Why use: prevent corrosive media from damaging the pressure gauge core; The diaphragm material (such as Hastelloy, Monel,
Tantalum, or Teflon coating) can withstand extreme chemical corrosion.
2. Food, Beverage, and Pharmaceutical Industries (Sanitary Applications)
This type of industry has extremely high hygiene requirements and must prevent the growth of microorganisms. The equipment needs to be easy to clean and sterilize (CIP/SIP).
Application areas: fermentation tanks, ingredient tanks, filling lines, purified water systems, clean pipelines.
Measurement media: milk, juice, beer, wine, soy sauce, edible oil, medicinal liquids, pure water, etc.
Why use:
Sanitary design: Adopting a flat embedded diaphragm (flush with the inner wall of the pipeline), there are no dead corners, and the medium can be completely emptied, making it easy to thoroughly clean and steam sterilize.
Material safety: The parts in contact with the medium are usually made of 316L stainless steel or electrolytic polishing, which meets the requirements of food grade (FDA) and pharmaceutical grade (GMP).
3. Water Treatment and Environmental Protection Engineering
The medium contains solid particles, suspended solids, fibers or has viscosity, which can easily block the pressure holes of ordinary pressure gauges.
Application areas: Dosing systems for sewage treatment plants, sludge transfer pumps, sedimentation tanks, filtration systems.
Measurement media: mud, coagulants (PAC, PAM), sewage, and wastewater containing impurities.
Why use: Because the diaphragm isolation system can effectively prevent solid particles or viscous substances from blocking the pressure gauge, ensuring long-term stable operation.
4. Power and energy industry
The medium temperature is extremely high, or the measurement system requires high reliability.
Application areas: Boiler steam pressure monitoring, high-temperature heat transfer oil systems, auxiliary systems for nuclear power plants.
Reason for use: By extending accessories such as cooling pipes, high-temperature media (such as steam) can be isolated, protecting the pressure gauge movement from high temperature effects that may cause failure or decrease in accuracy.
5. In the presence of viscous and easily solidified media
The medium is prone to solidification or crystallization at room temperature, which can cause blockage in the pressure channel of ordinary pressure gauges.
Application areas: Asphalt conveying, resin reaction kettle, chemical raw material (such as terephthalic acid) storage tank.
Measurement media: asphalt, resin, grease, paraffin, molten sulfur, etc.
Reason for use: The diaphragm surface is smooth and the medium is not easy to adhere to; Even if there is a small amount of solidification, it is limited to the surface of the diaphragm and will not damage the internal movement.
Summary
When you need to measure media that are corrosive, viscous, prone to crystallization, contain solid particles, or have high hygiene, high temperature, and high safety requirements in your work, diaphragm pressure gauges are the ideal choice. Its core value lies in the design of “isolation”, which separates harsh working environments from precise measurement mechanisms, thereby achieving stable, reliable, and durable pressure measurement under harsh conditions.