As the "invisible guardian" of industrial measurement, isolation diaphragms play an irreplaceable role in ensuring the safe operation of pressure gauges and extending their lifespan. They act as an intelligent barrier, accurately transmitting pressure signals while effectively blocking the intrusion of harmful media.
Applications of Isolation Diaphragms
Isolation diaphragms are widely used in numerous industries, including chemical, petroleum, pharmaceutical, food, and water treatment.
• Chemical and petroleum industries: Primarily used to measure highly corrosive, highly viscous, or easily crystallizing media, effectively protecting the instrument's core components.
• Pharmaceutical and food industries: Hygienic designs meet aseptic production and demanding cleaning requirements.
• Water treatment industries: They address challenges such as media contamination, particle clogging, and high-purity measurement, becoming a key component for stable and reliable pressure measurement under demanding conditions.
Working Principle and Technical Features of Isolation Diaphragms
The core value of isolation diaphragms lies in their isolation technology. When the measured medium contacts the diaphragm, pressure is transferred through the diaphragm to the fill fluid, and then to the pressure gauge's sensing element. This seemingly simple process solves a key challenge in industrial measurement.
Unlike traditional pressure gauges that come into direct contact with the media, the isolating diaphragm design creates a completely closed measuring system. This structure offers three major advantages: corrosion resistance, anti-clogging, and anti-contamination. Whether it's strong acids and bases, viscous slurries, or hygienic food and pharmaceutical media, the isolating diaphragm can handle them with ease.
The performance of the diaphragm directly impacts measurement accuracy. High-quality isolating diaphragms offer excellent temperature stability and fatigue resistance, maintaining linear deformation across a wide temperature range of -100°C to +400°C, ensuring accurate pressure transmission. They can achieve an accuracy grade of up to 1.0, meeting the high standards of most industrial applications.
Material Selection of Diaphragms
Different industrial media exhibit significant variations in their corrosive properties, making the choice of isolating diaphragm material crucial. 316L stainless steel is the most commonly used metal diaphragm material. Other materials available, such as Hastelloy C276, Monel, Tantalum (Ta), and Titanium (Ti), can be selected based on the media and operating conditions.
|
Material |
Application Medium |
|
Stainless Steel 316L |
Suitable for most corrosive environments, excellent cost performance |
|
Hastelloy C276 |
Suitable for strong acid media, especially reducing acids such as sulfuric acid and hydrochloric acid |
|
Tantalum |
Resistant to corrosion from almost all chemical media |
|
Titanium |
Excellent performance in chloride environments |
|
Tip: The material selection of the isolation diaphragm is for reference only. |
|
Structural Design
Different diaphragm configurations, such as flat and corrugated diaphragms, are available to meet specific needs.
• Flat diaphragms are easy to clean and suitable for the food industry.
• Corrugated diaphragms offer increased sensitivity and are suitable for measuring very low pressures.
We offer flat diaphragms and corrugated diaphragms in a variety of materials and specifications. Please contact us for competitive pricing. For specific specifications and materials, please refer to the "Metal Diaphragm" category.
Post time: Sep-26-2025