Description
1. Introduction to Flanged Process Connection, Diaphragm Seals MT-S200FD
The Flanged Process Connection, Diaphragm Seals MT-S200FD is a high-performance sealing system specially engineered for direct mounting or remote assembly on industrial pressure transmitters and pressure gauges. This model is widely used in applications where the process medium is slurry, sticky, viscous, abrasive, or chemically aggressive, making direct contact between the medium and the measuring instrument unsuitable. By incorporating a wafer-style flanged design, the MT-S200FD provides a flush, smooth internal interface that prevents clogging, sediment buildup, or measurement drift.
Designed for long-term operational stability, the diaphragm seal utilizes a laser-welded flush diaphragm, ensuring leak-proof integrity and reliable pressure transfer. The result is a device that delivers precise measurement performance while protecting sensitive measurement instruments in demanding industrial environments.
2. Key Application Features
Flush Pipeline Fitment
The MT-S200FD uses a wafer seal design, allowing flush mounting directly into the pipeline. This ensures that there are no dead spaces or cavities where product residue could accumulate. It is particularly beneficial in slurry applications, where solid particles are suspended in liquid.
Laser-Welded Flush Diaphragm
The flush-welded diaphragm, made from high-grade AISI SS 316, provides a smooth contact surface that reduces turbulence and minimizes wear. The laser welding process ensures mechanical strength and eliminates the possibility of gasket-driven leakage.
Optional Flushing Ring for Maintenance
For applications where material adhesion is high—such as food slurry, polymer emulsions, or wastewater sludge—an optional flushing ring can be added. This allows operators to clean the diaphragm surface without dismantling the pipeline.
Support for Exotic Materials
To extend service life in corrosive or abrasive chemical environments, the diaphragm and wetted components may be manufactured from Hastelloy, Duplex, Monel, Titanium, and other specialized alloys.
Suitable for Pressure Transmitter Refurbishment
The MT-S200FD is ideal for refurbishment or replacement of worn transmitter manifolds without requiring full system redesign. Its compact wafer-style geometry simplifies upgrading existing installations.
3. Typical Industrial Applications
The Flanged Process Connection, Diaphragm Seals MT-S200FD is best suited for industries where the medium presents challenges due to consistency, contamination level, or cleaning requirements. Some common applications include:
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Slurry conveying pipelines in mining, dredging, and ore processing
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Food processing systems that move thick mixtures like sauces, cream, or bakery pastes
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Wastewater treatment aeration and sludge management lines
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Chemical reactors and corrosive media process loops
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Oil & gas injection skids and multiphase flow lines
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Pulp & paper stock pumping applications
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Paints and coatings high-viscosity production lines
These industries often require reliable pressure measurement without frequent maintenance shutdowns. The MT-S200FD solves this by ensuring easy cleaning, stable instrument isolation, and long-term durability.
4. Standard Technical Specifications (PARAMETERS STANDARD)
| Parameter | Specification |
|---|---|
| Pressure Range Type | -1…250 bar |
| Wafer Material | AISI SS 316 |
| Diaphragm Material | AISI SS 316 |
| Instrument Connection | ¼” NPT (M) |
| Sealing Fluid | Silicon Oil |
| Process Flange Standard | ANSI 16.5B / EN 1092-1 / JIS B 2210 (RF) |
| Assembly Type | Remote Assembly |
| Capillary Tubing Material | AISI SS 304 |
| Armor Protection Material | AISI SS 304 |
| Remote Mounting Length | 2000 mm Standard |
5. Operational Working Principle
The Flanged Process Connection, Diaphragm Seals MT-S200FD functions by isolating the pressure sensing element of a gauge or transmitter using a completely sealed diaphragm. The internal cavity behind the diaphragm is filled with silicone-based sealing fluid, which transmits pressure changes from the process medium to the sensor without allowing any physical contact between them. This prevents:
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Contamination of the instrument
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Corrosion damage to the pressure cell
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Abrasive wear on internal mechanisms
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Heat transfer overload
Because the diaphragm is mounted flush with the pipeline interior, it does not disturb fluid flow, ensuring accurate readings even under turbulent or dense media conditions.
6. Performance and Reliability Benefits
High Stability in Heavy Slurry Conditions
The flush design ensures that solid particles do not accumulate, preventing blockages and improving measurement reliability.
Extended Service Life
By isolating the instrument from mechanical and chemical stress, the MT-S200FD significantly extends the lifespan of pressure transmitters and mechanical gauges.
Enhanced Safety
The laser-welded diaphragm minimizes the chance of leakage, especially under high-pressure environments.
Maintenance-Friendly Design
With the optional flushing ring and remote capillary system, operators can perform cleaning or calibration with minimal system downtime.
Adaptability to Harsh Process Conditions
Optional exotic alloy construction ensures compatibility with highly corrosive process fluids.
7. Installation and Remote Assembly Option
The Remote Assembly configuration allows the pressure transmitter to be located up to 2000 mm away from the process connection. This is especially useful for:
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High-temperature lines where cooling distance is necessary
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Vibrating equipment where stable mounting is required
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Hard-to-reach pipelines where access is limited
The SS 304 capillary and armor protection ensure mechanical stability and shielding from external damage.
8. Conclusion
The Flanged Process Connection, Diaphragm Seals MT-S200FD is a sophisticated and robust solution for slurry-heavy, corrosive, viscous, or high-contamination process systems. With its wafer seal flush-mounted design, laser-welded diaphragm, remote mount capability, and optional exotic material construction, it ensures accurate, reliable, and long-lasting pressure measurement performance.
Engineers and process specialists choose the MT-S200FD for its durability, operational efficiency, maintenance simplicity, and adaptability across a wide range of industrial environments.
