Description
1. Introduction to Flanged Diaphragm Seal MT-S120FD
The Flanged Diaphragm Seal MT-S120FD is a high-performance pressure isolation component designed to protect pressure gauges, transmitters, and Bourdon tube instruments from direct contact with aggressive, viscous, hot, or contaminated process media. This seal uses a stainless-steel internal diaphragm and a flanged process connection, making it highly suitable for chemical, petrochemical, and industrial process systems.
The purpose of the Flanged Diaphragm Seal MT-S120FD is to ensure accurate pressure transmission to the measuring device while keeping the sensing element clean and unaffected by the process medium. This significantly increases instrument reliability, operational safety, and measurement accuracy.
In this SEO-optimized article, we will explore the features, applications, material specifications, benefits, and working principle of the Flanged Diaphragm Seal MT-S120FD to give a clear understanding of why it is widely used in demanding industrial environments.
2. Key Features and Design Advantages
The Flanged Diaphragm Seal MT-S120FD comes with several core design features that ensure stable and reliable use in harsh process conditions:
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Flanged Type Construction: Allows direct mounting on pipelines, tanks, and industrial equipment.
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Internal Stainless Steel Diaphragm: Ensures accurate pressure transfer and prevents contamination.
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Threaded Design for Instrument Connection: Makes installation simple and secure.
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Compatible with Bourdon Tube Pressure Gauges, Pressure Transmitters, and Chemical Seals: Ensures wide adaptability.
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Suitable for Corrosive, Viscous, Hot, and Contaminated Media: Ideal for challenging environments in chemical and petrochemical industries.
This design ensures safe measurement and long-term performance even when working with slurries, adhesive substances, polymerizing fluids, chemical substances, and media with solid particles.
3. Applications of Flanged Diaphragm Seal MT-S120FD
The Flanged Diaphragm Seal MT-S120FD is used commonly in:
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Chemical Process Plants
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Petrochemical Refineries
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Oil & Gas Processing Units
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Industrial Fluid Systems
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Pulp and Paper Plants
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Water Treatment Systems
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Pharmaceutical and Biochemical Processing
It is particularly effective in applications where direct exposure of the pressure sensor to the media can cause corrosion, clogging, sedimentation, or operational damage.
This diaphragm seal ensures precise measurement and stable pressure indication, even when the media is high-temperature, corrosive, or viscous.
4. Working Principle and Pressure Transmission
The Flanged Diaphragm Seal MT-S120FD operates based on hydraulic pressure transmission.
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The process pressure is applied directly to the internal stainless steel diaphragm.
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The diaphragm transfers the pressure to a silicone oil-filled chamber.
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The fill fluid transmits this pressure to the measuring instrument (gauge, transmitter, or switch).
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The measuring device displays the precise pressure value without coming into contact with the process media.
This indirect pressure measurement method ensures that the sensor remains protected and isolated, enabling stable performance and long service life.
5. Standard Parameters and Material Specifications
| Parameter | Specification |
|---|---|
| Range Type | 0…0.6 bar to 0…250 bar |
| Upper Body Material | AISI 316 Stainless Steel |
| Diaphragm Material | L316 Stainless Steel |
| Lower Body Material | L316 / 316 Stainless Steel |
| Process Connection Type | Flanged |
| Pressure Rating | PN 10 to PN 250 / Class 150 to Class 2500 |
| Instrument Connection | ½” BSP (F) / ½” NPT (F) |
| Filling Fluid | Silicone Oil |
| Sealing Ring | PTFE (Temperature Resistance up to 250°C) |
| Approx. Diaphragm Housing Dimension | 59 mm (Upper Housing Welded) |
The use of L316 stainless steel in the diaphragm ensures excellent corrosion resistance, dimensional stability, and mechanical strength.
6. Advantages of Using Flanged Diaphragm Seal MT-S120FD
The Flanged Diaphragm Seal MT-S120FD delivers multiple operational and economic benefits:
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Protects Instruments From Corrosion and Contamination: Ideal for harsh chemical media.
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Improves Measurement Stability and Accuracy: Maintains consistent pressure transmission.
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Reduces Maintenance Requirements: No clogging or sediment accumulation on instrument side.
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Extends Instrument Life: Shielding the sensor enhances reliability and reduces failure risk.
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Ensures Safe Operation at High Temperature and Pressure: Designed for demanding industrial environments.
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Supports Clean and Controlled Processing: Suitable for both batch and continuous processing systems.
These benefits make it a preferred diaphragm seal solution for process engineers, maintenance teams, and instrumentation designers.
7. Installation and Assembly Options
The Flanged Diaphragm Seal MT-S120FD supports multiple assembly configurations:
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Direct Mounting to the pressure gauge or transmitter.
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Remote Mounting with Capillary Lines for high-temperature or vibrating systems.
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Vertical or Horizontal Mounting depending on piping design.
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Inline or Tank Wall Installation for industrial process monitoring.
The threaded instrument connection allows fast and reliable assembly without specialized tooling.
8. Performance with Different Media Types
This diaphragm seal is engineered to handle:
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Hot Oils and Steams
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Viscous Fluids and Slurries
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Acids, Alkalis, and Chemical Mixtures
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Hydrocarbons and Petrochemical Derivatives
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Contaminated Process Liquids
Its internal diaphragm prevents media intrusion, ensuring accurate measurement and preventing damage from chemical reactions or solid residues.
9. Conclusion
The Flanged Diaphragm Seal MT-S120FD is a high-quality and reliable solution for isolating pressure instruments from challenging industrial media while maintaining measurement precision. Its stainless-steel construction, flanged connection, and silicone-filled diaphragm chamber make it ideal for chemical, petrochemical, and general industrial applications.
With its robust design, flexibility, and compatibility with pressure gauges and transmitters, the Flanged Diaphragm Seal MT-S120FD is an essential component for achieving accurate, safe, and long-lasting pressure measurement in harsh process environments.
