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Anhui Tiankang Diaphragm Seal Pressure Transmitter
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Anhui Tiankang Diaphragm Seal Pressure Transmitter
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The Anhui Tiankang Diaphragm Seal Pressure Transmitter is designed for pressure measurement in applications where the process medium should not directly enter the transmitter sensor. It uses a diaphragm seal to isolate the process fluid from the sensing element, making it suitable for corrosive, viscous, crystallizing, high-temperature, sanitary, or easy-to-block media.
Based on the Anhui Tiankang TK3051C transmitter platform and 1199 diaphragm sealing system, this product can be supplied with different seal structures, including direct-mounted flange seals, remote diaphragm seals with capillary, threaded remote seals, inserted diaphragm seals, and sanitary clamp-type diaphragm seals. It is widely used in chemical, petrochemical, food, pharmaceutical, power generation, water treatment, and general process industries.
The Anhui Tiankang diaphragm seal pressure transmitter is a smart pressure transmitter combined with a diaphragm seal system. The diaphragm seal separates the process medium from the transmitter sensor, while the pressure is transmitted through a sealed filling fluid to the sensing module.
Compared with a standard threaded pressure transmitter, this structure is more suitable for difficult process media. In many industrial applications, the medium may be corrosive, viscous, crystallizing, dirty, high-temperature, or easy to block small pressure ports. If the medium enters the transmitter sensor chamber directly, it may cause corrosion, clogging, slow response, unstable output, or sensor damage.
The diaphragm seal structure solves this problem by allowing the process medium to contact only the diaphragm and wetted seal parts. The transmitter body and sensor remain protected from direct contact with the process fluid.
This product can be used for:
The working principle of an Anhui Tiankang diaphragm seal pressure transmitter is based on pressure transfer through an isolation diaphragm and filling fluid.
Process Pressure → Isolation Diaphragm → Filling Fluid → Sensor Module → 4–20 mA / HART Output
The process pressure acts on the diaphragm surface. The diaphragm transfers this pressure to the filling fluid inside the sealed system. The filling fluid then transmits the pressure to the sensor module of the transmitter. The transmitter converts the pressure signal into a standard output signal for PLC, DCS, recorder, or other control systems.
This structure prevents the measured medium from entering the transmitter sensor directly, which is especially important for corrosive, viscous, crystallizing, sanitary, or high-temperature processes.
The diaphragm seal isolates the process medium from the transmitter sensor. This helps protect the instrument and improve measurement reliability in applications where ordinary pressure transmitters may fail due to blockage, corrosion, or contamination.
Typical difficult media include:
The diaphragm seal can be directly mounted to the transmitter or connected by capillary.
| Structure | Typical Use |
|---|---|
| Direct-mounted diaphragm seal | Compact installation, normal temperature, accessible process flange |
| Remote seal with capillary | High temperature, vibration, difficult access, or remote display position |
| Threaded diaphragm seal | Smaller process connections or compact equipment |
| Inserted diaphragm seal | Long nozzles, thick vessel walls, lined tanks, or reduced dead space |
| Sanitary clamp diaphragm seal | Food, beverage, pharmaceutical, and clean process applications |
The Anhui Tiankang diaphragm seal pressure transmitter can be used not only for pressure measurement, but also for tank level measurement when installed on a vessel or tank flange.
For open tanks, a single flange diaphragm seal transmitter can measure liquid level based on hydrostatic pressure. For closed or pressurized tanks, a differential pressure transmitter with two remote diaphragm seals may be required to compensate for top pressure.
The diaphragm material should be selected according to medium compatibility.
| Diaphragm Material | Typical Application |
|---|---|
| 316L Stainless Steel | General water, oil, steam condensate, and mild chemical media |
| Hastelloy C-276 | Corrosive chemical media and many acidic applications |
| Tantalum | Selected strong acid applications |
| Monel | Certain special chemical media |
| Gold-plated diaphragm | Hydrogen service or hydrogen permeation concern |
| PTFE coating / lining | Strong corrosive or special anti-corrosion applications |
Actual material selection should be confirmed according to the medium name, concentration, temperature, pressure, and corrosion characteristics.
Filling fluid is one of the most important parts of a diaphragm seal system. It affects response time, temperature performance, stability, and application suitability.
Common filling fluid options include:
For high temperature, vacuum, oxygen service, food and pharmaceutical processes, or special chemical media, filling fluid must be selected carefully.
For remote seal structures, the transmitter can be installed away from the process connection through a capillary. This is useful when:
A flushing ring can be installed between the process flange and diaphragm seal. It provides ports for flushing, cleaning, draining, venting, or calibration.
Flushing rings are especially useful for:
| Item | Specification |
|---|---|
| Product Name | Anhui Tiankang Diaphragm Seal Pressure Transmitter |
| Brand | Anhui Tiankang |
| Related Series | TK3051C / 1199 Diaphragm Sealing System |
| Product Type | Smart Pressure Transmitter with Diaphragm Seal |
| Measurement Type | Gauge Pressure, Absolute Pressure, Differential Pressure, Level |
| Process Medium | Liquid, Gas, Steam, Corrosive Media, Viscous Media, Crystallizing Media |
| Seal Structure | Direct Mount, Remote Seal with Capillary, Threaded Seal, Inserted Seal, Sanitary Clamp Seal |
| Output Signal | 4–20 mA / 4–20 mA + HART, depending on transmitter configuration |
| Diaphragm Materials | 316L, Hastelloy C-276, Tantalum, Monel, Gold-Plated, PTFE-Coated Options |
| Filling Fluid | Silicone Oil, High-Temperature Oil, Low-Temperature Oil, Fluorinated Oil, Sanitary Filling Fluid |
| Process Connection | Flange, Thread, Clamp, Inserted Type, Customized Connection |
| Optional Accessories | Capillary, Flushing Ring, Mating Flange, Gasket, Mounting Bracket, Cable Gland |
| Typical Applications | Corrosive Media, High-Viscosity Media, Crystallizing Media, High Temperature, Sanitary Process |
A direct-mounted flange diaphragm seal is connected directly to the transmitter body. The seal flange is installed on the process flange, and the transmitter is mounted directly above the seal.
Typical installation:
Process Flange → Gasket → Diaphragm Seal Pressure Transmitter
This structure is compact and suitable when the process temperature is not too high and the transmitter can be installed directly at the measurement point.
It is commonly used for:
A remote diaphragm seal pressure transmitter uses a capillary between the diaphragm seal and transmitter body. The seal contacts the process medium, while the transmitter can be installed in a safer, cooler, or more convenient position.
Typical installation:
Process Flange → Remote Diaphragm Seal → Capillary → Pressure Transmitter
This structure is suitable for:
The capillary length should be selected carefully because longer capillaries may increase response time and temperature influence.
A threaded diaphragm seal is used for smaller process connections where a flange is not required. It can be selected for compact equipment, small vessels, skids, and special process connection points.
This type is useful when the process connection is small but the medium still requires diaphragm isolation.
An inserted diaphragm seal extends the diaphragm into the process nozzle or vessel connection. It is useful when the vessel wall is thick, the tank nozzle is long, or the diaphragm needs to be closer to the inner wall of the process equipment.
This structure can help:
A sanitary clamp diaphragm seal is designed for food, beverage, pharmaceutical, and clean process applications. It normally uses a clamp connection and hygienic sealing structure.
This type is suitable for:
For sanitary applications, gasket material, surface finish, cleaning temperature, and CIP/SIP requirements should be confirmed before ordering.
Used for pressure measurement in reactors, storage tanks, pipelines, dosing systems, separators, and process vessels where the medium may be corrosive, viscous, crystallizing, toxic, or easy to block.
With suitable diaphragm and wetted materials, the transmitter can measure acids, alkalis, solvents, and other corrosive fluids. For strong corrosion, material selection is critical.
The diaphragm seal structure avoids narrow pressure passages and helps reduce blockage risk. It is suitable for viscous liquids, sticky media, slurry-like media, crystallizing liquids, and liquids containing deposits.
For high-temperature liquids or steam-related applications, a remote seal with capillary can move the transmitter away from the hot process connection. High-temperature filling fluid and proper seal design should be selected.
The diaphragm seal pressure transmitter can be used for pressure-based level measurement. For open tanks, a single flange structure may be sufficient. For closed or pressurized tanks, a differential pressure transmitter with remote seals is often preferred.
Sanitary diaphragm seal structures are suitable for hygienic process connections where residue reduction, cleanability, and compatibility with cleaning or sterilization procedures are important.
Used in dosing systems, sludge lines, wastewater treatment, filtration systems, and storage tanks where dirty, corrosive, or easy-to-block liquids may be present.
When selecting an Anhui Tiankang diaphragm seal pressure transmitter, the following information should be confirmed:
| Item | Standard Pressure Transmitter | Anhui Tiankang Diaphragm Seal Pressure Transmitter |
|---|---|---|
| Process Contact | Medium enters threaded pressure port | Medium contacts diaphragm seal only |
| Blockage Risk | Higher for dirty or viscous media | Lower with suitable diaphragm seal |
| Corrosion Protection | Limited by sensor wetted material | Better isolation with selected diaphragm material |
| High Temperature Use | May require syphon or cooling element | Remote seal and capillary can protect transmitter |
| Sanitary Use | Usually not ideal | Sanitary clamp seal option available |
| Installation Cost | Usually lower | Usually higher |
| Typical Media | Clean liquid, gas, steam | Corrosive, viscous, crystallizing, sticky, sanitary, high-temperature media |
For clean water, air, oil, and ordinary gas pressure measurement, a standard pressure transmitter is usually sufficient. For difficult media or special process conditions, a diaphragm seal pressure transmitter is usually more reliable.
Common accessories include:
Typical direct mount installation:
Process Flange → Gasket → Diaphragm Seal Pressure Transmitter
Typical installation with flushing ring:
Process Flange → Gasket → Flushing Ring → Gasket → Diaphragm Seal Pressure Transmitter
Typical remote seal installation:
Process Flange → Remote Diaphragm Seal → Capillary → Pressure Transmitter
SIYelectric supplies Anhui Tiankang diaphragm seal pressure transmitters and related diaphragm sealing systems for industrial projects, replacement orders, and process instrumentation procurement. We can help check model codes, review operating conditions, select diaphragm materials, confirm filling fluid, match capillary length, and prepare quotations based on actual site requirements.
For accurate quotation, please provide:
SIYelectric can also support related accessories such as flushing rings, mating flanges, PTFE gaskets, spiral wound gaskets, flanged reducers, capillary protection parts, mounting brackets, explosion-proof cable glands, instrument valves, and HART handheld communicators.
Available documents may include technical datasheet, certificate of conformity, inspection report, packing list, and commercial invoice, depending on order and project requirements.
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