Tiankang Single Flange Remote Seal Pressure Transmitter

Anhui Tiankang Single Flange Remote Seal Pressure Transmitter Overview

The Anhui Tiankang single flange remote seal pressure transmitter consists of a smart pressure transmitter, one remote diaphragm seal flange, and one capillary. The diaphragm seal is installed on the process flange, while the transmitter body can be mounted at a more convenient or safer location.

The process medium only contacts the diaphragm seal and wetted parts. The pressure is transferred through the filling fluid inside the capillary to the transmitter sensor. This structure helps avoid problems caused by direct process connection, such as blockage, corrosion, high temperature influence, or inconvenient field reading.

It is especially useful when:

• the process temperature is too high for direct mounting
• the process medium is corrosive or toxic
• the medium is viscous, sticky, or crystallizing
• the transmitter needs to be mounted away from vibration
• the process flange is inside an insulated area
• the display needs to be installed at a visible position
• the process connection is difficult to access for maintenance

Unlike a dual flange differential pressure level transmitter, this product uses only one remote seal and is mainly used for pressure measurement. It can also be used in some open tank level applications if the installation and reference pressure conditions are suitable.

Remote Seal Pressure Transmitter Working Principle

The working principle of the single flange remote seal pressure transmitter is based on diaphragm isolation and capillary pressure transmission.

Process Pressure → Remote Diaphragm Seal → Filling Fluid → Capillary → Pressure Transmitter Sensor → 4–20 mA / HART Output

The process pressure acts on the diaphragm surface. The diaphragm transfers pressure to the filling fluid inside the sealed system. The capillary then transmits the pressure to the sensor module inside the transmitter.

This structure prevents the process medium from entering the transmitter sensor directly, reducing the risk of corrosion, clogging, contamination, or temperature damage.

Key Features of Anhui Tiankang Remote Seal Pressure Transmitter

Single Remote Diaphragm Seal Structure

The transmitter uses one remote diaphragm seal flange connected by capillary. This allows the transmitter body to be installed separately from the process flange.

This structure is different from:

• direct-mounted diaphragm seal pressure transmitter: transmitter mounted directly on the seal
• dual flange DP level transmitter: two remote seals connected to a DP transmitter
• standard threaded pressure transmitter: medium enters the pressure port directly

Suitable for Difficult Process Media

The single flange remote seal structure is suitable for media that are difficult for ordinary pressure transmitters, including:

• corrosive liquids
• viscous liquids
• crystallizing media
• sticky or easy-to-deposit fluids
• dirty or slurry-like liquids
• toxic or hazardous fluids
• high-temperature liquids
• media that may block small pressure ports

Capillary Remote Installation

The capillary allows the transmitter body to be mounted away from the process connection. This helps protect the electronics and makes installation more flexible.

Remote mounting is useful when:

• the tank or pipeline is hot
• the process flange is hard to reach
• insulation covers the process connection
• vibration is strong near the pipeline
• the operator needs to read the display at another position
• maintenance space around the flange is limited

Flanged Diaphragm Seal Process Connection

The remote seal flange is installed on the process flange or vessel nozzle. This provides a larger process interface than a small threaded pressure port and is more suitable for viscous or dirty media.

Typical installation:

Process Flange → Gasket → Remote Diaphragm Seal → Capillary → Pressure Transmitter

If flushing is needed:

Process Flange → Gasket → Flushing Ring → Gasket → Remote Diaphragm Seal → Capillary → Pressure Transmitter

Diaphragm Material Options

The diaphragm material should be selected according to the medium.

Material selection should be confirmed according to medium name, concentration, temperature, pressure, and corrosion characteristics.

Filling Fluid Selection

The filling fluid inside the diaphragm seal and capillary system transfers pressure to the transmitter sensor. It directly affects response time, temperature performance, and long-term stability.

Common filling fluid options include:

• silicone oil for general applications
• high-temperature silicone oil
• low-temperature filling fluid
• fluorinated oil for oxygen or special service
• sanitary or food-grade filling fluid for hygienic applications

For high temperature, vacuum, oxygen service, food-grade service, or special chemical media, filling fluid selection must be checked carefully.

Technical Specifications for Single Flange Remote Seal Pressure Transmitter Selection

Industrial Applications of Anhui Tiankang Single Flange Remote Seal Pressure Transmitter

Chemical and Petrochemical Pressure Measurement

Used for pressure measurement in reactors, storage tanks, pipelines, dosing systems, separators, and process vessels where the medium may be corrosive, viscous, crystallizing, or toxic.

High-Temperature Process Pressure Measurement

When process temperature is too high for direct-mounted transmitters, the capillary structure allows the transmitter body to be installed away from the heat source. Suitable filling fluid and capillary length should be selected according to temperature conditions.

Viscous and Easy-to-Block Media

The flanged diaphragm seal provides a larger sensing surface than a threaded pressure port. This helps reduce blockage risk for viscous liquids, sticky media, crystallizing liquids, and dirty process fluids.

Corrosive Liquid Pressure Measurement

With suitable diaphragm material, the transmitter can measure corrosive liquids such as acids, alkalis, solvents, and special chemicals.

Tank and Vessel Pressure Monitoring

The transmitter can be used for tank pressure, vessel pressure, reactor pressure, and process equipment pressure monitoring where the transmitter needs to be installed away from the process flange.

Applications with Limited Access or Poor Visibility

If the process connection is in a difficult position, the transmitter can be mounted remotely so operators can read the display and perform maintenance more easily.

How to Select an Anhui Tiankang Single Flange Remote Seal Pressure Transmitter

When selecting a single flange remote seal pressure transmitter, confirm the following information:

1. Measurement type
   Confirm whether the application is gauge pressure, absolute pressure, or pressure-based level measurement.
2. Process medium
   Confirm medium name, concentration, viscosity, corrosion, crystallization tendency, solid content, and toxicity.
3. Pressure range
   Confirm normal pressure, maximum pressure, vacuum condition if any, and required calibrated range.
4. Process temperature
   Confirm normal and maximum process temperature. This affects filling fluid, capillary design, and diaphragm seal selection.
5. Process flange
   Confirm flange size, pressure rating, sealing face, and standard, such as ASME, EN, DIN, JIS, GB, or HG.
6. Diaphragm material
   Select 316L, Hastelloy C-276, tantalum, Monel, gold-plated, PTFE-coated, or other materials according to corrosion compatibility.
7. Capillary length
   Confirm the distance between the process flange and transmitter installation position. Longer capillaries may increase response time and temperature influence.
8. Filling fluid
   Select filling fluid according to temperature, vacuum, oxygen service, response time, and medium compatibility.
9. Flushing ring requirement
   For viscous, crystallizing, sticky, or dirty media, confirm whether a flushing ring is required.
10. Output and display
    Confirm whether 4–20 mA, HART communication, LCD display, or other communication options are required.
11. Installation accessories
    Confirm mounting bracket, gasket, mating flange, cable gland, capillary protection, and other accessories.
12. Certification and documents
    Confirm explosion-proof certification, inspection report, material certificate, calibration document, or project-specific documentation requirements.

Single Flange Remote Seal Pressure Transmitter vs Direct-Mounted Diaphragm Seal Pressure Transmitter

For compact installations with normal temperature, direct-mounted diaphragm seal transmitters are often simpler. For high temperature, vibration, insulation, or poor access, the remote seal type is more suitable.

Single Flange Remote Seal Pressure Transmitter vs Dual Flange DP Level Transmitter

The single flange remote seal pressure transmitter is mainly used for pressure measurement. If the application is closed tank level measurement and top pressure changes, a dual flange differential pressure level transmitter is usually more appropriate.

Accessories for Anhui Tiankang Single Flange Remote Seal Pressure Transmitter

Common accessories include:

• Remote diaphragm seal flange
• Capillary
• Flushing ring
• Mating flange
• PTFE gasket
• Spiral wound gasket
• Mounting bracket
• Capillary protection tube
• Explosion-proof cable gland
• HART handheld communicator
• Instrument valve if required

Typical installation without flushing ring:

Process Flange → Gasket → Remote Diaphragm Seal → Capillary → Pressure Transmitter

Typical installation with flushing ring:

Process Flange → Gasket → Flushing Ring → Gasket → Remote Diaphragm Seal → Capillary → Pressure Transmitter

Anhui Tiankang Single Flange Remote Seal Pressure Transmitter Supplier Support from SIYelectric

SIYelectric supplies Anhui Tiankang single flange remote seal pressure transmitters for chemical, petrochemical, power generation, water treatment, food, pharmaceutical, and general industrial process projects. We can help check model codes, confirm pressure range, select diaphragm material, choose filling fluid, determine capillary length, and match installation accessories according to actual site conditions.

For accurate quotation, please provide:

• measurement type: gauge pressure, absolute pressure, or level-related pressure measurement
• process medium and concentration
• normal and maximum process pressure
• normal and maximum process temperature
• flange size, pressure rating, and standard
• diaphragm material requirement
• capillary length requirement
• filling fluid requirement
• flushing ring requirement
• output signal and display requirement
• electrical connection and explosion-proof requirement
• required accessories or documents

SIYelectric can also support related accessories such as flushing rings, mating flanges, PTFE gaskets, spiral wound gaskets, mounting brackets, capillary protection parts, explosion-proof cable glands, and HART communicators.

Available documents may include technical datasheet, certificate of conformity, inspection report, packing list, and commercial invoice, depending on order and project requirements.