Technical Specifications – TS Thermosiphon System

The TS Thermosiphon System is a seal support system designed to cool and circulate barrier or buffer fluid for double mechanical seals using the natural heat transfer effect. By eliminating the need for an external circulation pump, it improves seal reliability, extends seal life, and reduces maintenance costs in demanding industrial applications.

Note: Operating limits and instrumentation configurations can be customised based on process requirements.

Compatible Pump Applications

Unlike standard mechanical seals, the TS System is not specific to one pump brand. It is compatible with any pump using double mechanical seals requiring API Plan 52 or Plan 53A support systems.

Typical Compatible Pump Types

Compatible Mechanical Seal Arrangements

• Double Cartridge Mechanical Seals
• Tandem Mechanical Seals
• Back-to-Back Mechanical Seals
• Pressurised Dual Seals
• Unpressurised Buffer Fluid Systems

Material Options

Since the TS thermal circulation system is a seal support vessel rather than a mechanical seal, traditional seal face materials such as SiC, TC, and Carbon are not directly applicable to the vessel itself. However, the system is designed to support double mechanical seals configured with these material combinations.

Supported Mechanical Seal Face Materials

Vessel Material Options

Instrumentation Options

Dimensions Table

The TS system is available in multiple vessel capacities to suit different seal cooling requirements.

Important: Vessel capacity should be selected based on the heat load, seal arrangement, process temperature, and available installation space.

Key Applications 

The TRISUN Seal Cooling System is versatile, with applications spanning across various industries and residential setups. Some key uses include:

Solar Thermal and Solar Water Heating Systems

TRISUN’s Seal Cooling System system is ideal for solar thermal systems and solar water heating applications. Using natural convection, it provides pump-free hot water circulation and improves energy efficiency.

Sustainable Hot Water Supply

The system helps deliver consistent hot water using renewable solar energy, even in off-grid locations or during power outages.

Low-Maintenance and Energy-Efficient Operation

Because no electric pump is required, the system offers low maintenance, lower operating costs, and reliable long-term performance.

Wood Fire Water Heater Applications

The TRISUN pump-free heat transfer system is also suitable for wood fire water heaters and biomass heating systems, providing natural heat transfer to water tanks.

Natural Circulation Heating

It uses the seal support cooling system effect to move heated water without electricity, ensuring a steady supply of hot water.

Eco-Friendly Heating Solution

By reducing electricity use and relying on renewable heat sources, the system helps lower energy costs and carbon emissions.

Advantages of TRISUN Heat Transfer Circulation Systems for Residential and Industrial Use

Comparison: Passive Heat Transfer System vs Pump-Driven Cooling Systems

The passive cooling loop offers significant advantages over traditional pump-driven cooling setups. The comparison below highlights key differences to help you understand which solution is best for your application.

Seal Cooling System with Natural Convection

No Electricity or Pump Required

A seal support cooling system uses natural convection for passive cooling, eliminating the need for electrical power or circulation pumps.

Simple, Reliable, and Low Maintenance

With fewer moving parts, seal cooling systems offer greater reliability, lower maintenance, and reduced risk of failure.

Energy-Efficient and Cost-Effective

These systems reduce electricity use and operating costs, making them ideal for API Plan 52 and 53A seal support systems, solar heating, and off-grid applications.

Pump-Driven Cooling System

Requires Power and More Components

Pump-driven cooling systems rely on electricity, pumps, and additional mechanical components for forced circulation.

Higher Maintenance and Operating Costs

Because they include pumps, seals, and motors, these systems require more maintenance and have higher long-term energy costs.

Best for Large Installations

Pump-driven systems are better suited for large-scale applications that require high coolant flow and forced circulation.

Installation Requirements & Operating Conditions

To ensure optimal performance and safety, these system must be installed according to the following guidelines:

Mounting Position for Proper Natural Convection Circulation

• Install the seal cooling system reservoir or seal support tank above the mechanical seal chamber to enable natural convection cooling.
• Maintain a vertical height difference of at least 300–800 mm between the seal chamber and heat transfer circulation tank for efficient barrier fluid circulation and heat transfer.

Piping Layout for Efficient Seal Support Cooling System Flow

• Use short, vertical piping runs wherever possible to improve natural circulation and reduce flow resistance.
• Avoid excessive pipe bends, long horizontal piping sections, or restrictions that can limit colling syatem performance.
• Select piping materials that are compatible with high-temperature fluids, abrasive liquids, and chemically aggressive process media.

Operating Temperature and Pressure Limits

• Verify that the seal support cooling system matches the required operating conditions for your mechanical seal support system or cooling application.
• Typical seal cooling system operating temperature range: 0–200°C, depending on the model and barrier fluid.
• Typical seal support cooling system operating pressure range: up to 20–40 bar, depending on the reservoir design and vessel specification.
• Ensure the selected barrier fluid, heat transfer fluid, or glycol mixture is compatible with the required temperature and pressure range.

Cooling and Ventilation Around the seal support cooling system Tank

• Provide adequate airflow around the passive heat transfer system tank, cooling coil, or heat exchanger to improve passive cooling efficiency.
• Keep the installation area free from dust, debris, and excessive ambient heat that could reduce heat transfer circulation system performance.

Barrier Fluid and Heat Transfer Fluid Selection

• Use recommended barrier fluids for API Plan 52, API Plan 53A, and other mechanical seal support systems.
• For solar water heating systems, wood fire heaters, and industrial heat transfer applications, use water or glycol mixtures designed for high-temperature operation and freeze protection.

Maintenance Guide 

Passive heat transfer systems require minimal maintenance due to their passive, pump-free design. Regular inspection and fluid management ensure long-term reliability.

Routine Checks

• Inspect fluid levels through the sight glass periodically.
• Ensure there are no leaks from fittings, piping, or the reservoir.

Barrier Fluid Condition

• Check barrier fluid for contamination, discoloration, or particles.
• Refill or replace fluid as needed based on operating hours and system load.

Pressure and Temperature Monitoring

• Confirm the system remains within safe pressure and temperature limits.
• Ensure cooling coils and external surfaces are clean and exposed to adequate airflow.

Cooling Coil and External Surface Cleaning

• Clean dust, dirt, and debris from cooling fins or coils to maintain heat dissipation efficiency.

Safety Component Inspection

• Inspect relief compressor control valves, if installed, annually.
• Check mounting brackets, gaskets, and fittings for wear.

Annual Seal Cooling System Maintenance

• Verify piping insulation integrity.
• Conduct a pressure test if required by site standards.
• Replace sealing components if signs of wear or degradation are present.

Common Seal Cooling System Troubleshooting

• Poor Circulation: Check height positioning and piping restrictions.
• Overheating: Improve cooling airflow or clean the cooling coil.
• Low Fluid Level: Inspect for leaks and refill the barrier fluid.
• Foaming or Bubbles: Replace contaminated heat transfer fluid.

With proper installation and periodic maintenance, the cooling system delivers reliable, energy-efficient performance for many years.

How to Select the Right Thermal circulation System reservoir Size

The right Thermal circulation system reservoir size depends on the seal type, operating temperature, process pressure, and heat generated by the pump.

Typical Reservoir Sizes

A common guideline is to choose a reservoir that holds 10–20 times the fluid volume in the seal chamber and piping.

Example:
Seal chamber + piping volume = 0.5 liters
Recommended reservoir size = 5–10 liters

Use a larger reservoir when the system has:

• High temperatures
• Long piping runs
• Continuous-duty operation
• API Plan 53A service
• Hazardous or high-pressure fluids

For best performance:

• Install the reservoir 300–800 mm above the seal chamber
• Use short, vertical piping
• Add a cooling coil for temperatures above 80–100°C
• Use stainless steel reservoirs for corrosive or high-temperature applications

Why Choose the TRISUN Thermosiphon System?

If you are considering enhancing your heating or cooling setup with a more sustainable solution, it offers numerous advantages. From its energy-efficient design to its low-maintenance nature, this system can be a game-changer for both residential and industrial applications. Whether you're looking to optimize your solar thermal systems or need an effective way to circulate heat in wood fire water heaters, the TRISUN system provides a reliable, cost-effective solution.

A passive heat transfer system operates using a working fluid that absorbs energy and naturally circulates to transfer heat efficiently without external pumps. In thermal cycles, the fluid can condensate to the evaporator, enabling continuous heat exchange and improved system performance.

A passive heat transfer system is a reliable, energy-efficient solution for mechanical seal cooling and barrier fluid circulation in industrial applications. By eliminating the need for pumps and utilizing natural convection, it reduces maintenance, lowers operating costs, and improves overall system reliability.

Looking for a high-performance thermosiphon system for your application?
Contact TRISUN today for expert guidance, customized solutions, and fast global delivery.

Frequently Asked Questions