How to Check Coolant Compatibility Before Selecting a Brazed Plate Heat Exchanger

Brazed plate heat exchangers (BPHEs) are widely used in industrial cooling, HVAC systems, refrigeration, chillers, heat recovery, and liquid cooling applications. Their compact construction and high heat-transfer surface density make them attractive for equipment manufacturers and industrial buyers.

However, selecting a brazed plate heat exchanger involves more than matching cooling capacity, flow rate, and connection size.

One of the most important factors is whether the working fluid is chemically and thermally compatible with the heat exchanger materials.

A coolant that performs well in one heat exchanger may cause corrosion, fouling, or premature failure in another. This is particularly important for brazed plate heat exchangers because their internal plates are permanently joined and normally cannot be removed for mechanical cleaning or replacement.

The compatibility of a coolant depends on its chemical composition, operating temperature, concentration, water quality, and the materials exposed to the fluid.

For example, a conventional copper-brazed stainless steel heat exchanger may be suitable for certain treated-water and inhibited glycol applications. However, aggressive water chemistry, ammonia, or unsuitable cleaning chemicals may create serious compatibility problems.

This guide explains how to evaluate coolant compatibility, compare common brazing materials, identify critical water-quality parameters, and prepare the information required before requesting a brazed plate heat exchanger quotation.

1. What Does Coolant Compatibility Mean in a Brazed Plate Heat Exchanger?

1.1 Understanding the Materials Inside a Brazed Plate Heat Exchanger

A conventional brazed plate heat exchanger consists of thin corrugated metal plates permanently joined at contact points.

The corrugations create alternating flow channels for the two fluids, allowing heat transfer through the metal surfaces while keeping the fluids separated.

Common construction materials include:

• Stainless steel heat-transfer plates

• Copper or nickel-based brazing material

• Stainless steel connections and cover plates, depending on the design

The exact materials vary between manufacturers and product models.

A typical copper-brazed exchanger may use stainless steel plates joined with copper filler material.

Both the plate surfaces and the exposed brazing material must be compatible with the operating fluid.

1.1.1 Why Brazing Material Matters as Much as Plate Material

A buyer may see "316L stainless steel plates" in a product description and assume the entire exchanger has the corrosion resistance of stainless steel.

This assumption is incorrect.

The brazing material is also part of the structure that comes into contact with the fluid.

If the coolant corrodes the brazing material, the heat exchanger may still experience internal leaks or other damage, even if the stainless steel plates remain largely unaffected.

1.1.1.1 A Common Purchasing Mistake

Suppose a buyer needs to purchase a stainless steel brazed plate heat exchanger for a chemical processing cooling system.

The supplier offered a model made of stainless steel plates and copper using a brazing process.

Although the buyer verified the compatibility of the stainless steel, they did not test the corrosion resistance of the copper.

This left a significant material compatibility issue unresolved.

The correct approach is to verify the compatibility of every wetted material rather than checking only the main plate alloy.

1.2 Chemical Compatibility vs. Thermal Compatibility

Coolant compatibility involves two different considerations.

Chemical compatibility concerns whether the fluid can cause unacceptable corrosion, chemical attack, material degradation, or contamination.

Thermal and hydraulic suitability concerns whether the fluid properties allow the exchanger to achieve the required heat duty and pressure drop.

A fluid can be chemically acceptable but still require a different heat exchanger size because of its viscosity, specific heat capacity, or thermal conductivity.

Both aspects must be evaluated.

1.3 Why Both Fluid Circuits Must Be Checked

Brazed plate heat exchangers typically consist of two separate fluid circuits.

For example, one side may circulate treated water, while the other side may carry a glycol mixture.

Both fluids come into contact with their respective internal plates and brazed joints.

Even if the fluid in one circuit is compatible, the other circuit may still pose a risk of corrosion or contamination.

Therefore, when conducting a compatibility review, these two circuits should be evaluated separately.

2. Which Coolants Are Commonly Used in Brazed Plate Heat Exchangers?

2.1 Treated Water

Water is widely used in HVAC, industrial cooling, heat recovery, and liquid-to-liquid heat transfer.

It provides favorable thermal properties and is often economical to circulate.

However, water compatibility depends on its chemical composition.

Potentially important factors include:

• pH

• Chloride concentration

• Dissolved oxygen

• Conductivity

• Hardness

• Dissolved salts

• Water-treatment chemicals

• Suspended particles

Not all water sources have the same composition.

For example, closed-loop treated water may behave differently from untreated groundwater or water from an open cooling system.

The water source and treatment programme should be identified before equipment selection.

2.2 Ethylene Glycol and Propylene Glycol Solutions

Water-glycol mixtures are commonly used when freeze protection is required.

Two important glycol types are:

Ethylene glycol (EG): Used in many industrial heat-transfer systems.

Propylene glycol (PG): Used in applications where its particular properties or the project's safety and regulatory requirements make it preferable.

Both may be suitable for appropriately selected brazed plate heat exchangers, but compatibility depends on the complete coolant formulation and operating conditions.

The buyer should provide:

• Glycol type

• Glycol concentration

• Concentration basis, such as weight or volume

• Product manufacturer and commercial grade

• Corrosion inhibitor information

• Maximum and minimum operating temperatures

2.2.1 Why Inhibited and Uninhibited Glycol Are Different

Many commercial ethylene glycol coolants contain corrosion inhibitors.

These additives help protect metal components under specified operating conditions.

However, inhibitor formulations vary by product and may not be suitable for all materials or water treatment chemicals.

In addition, inhibitor consumption and coolant degradation can alter the coolant’s chemical composition during operation.

To ensure long-term reliability, follow the monitoring and replacement recommendations provided by the coolant supplier.

2.2.1.1 Why Glycol Concentration Alone Is Insufficient

An RFQ stating "30% glycol" does not fully identify the coolant.

The supplier still needs to know whether it is ethylene glycol or propylene glycol, whether the concentration is by volume or mass, and which inhibitor package is present.

These details affect both corrosion assessment and thermal calculations.

2.3 Deionized and High-Purity Water

High-purity water is used in certain industrial and electronic cooling applications.

However, low conductivity does not necessarily mean that the fluid is harmless to metals.

Depending on its chemical properties and operating environment, deionized water may react with exposed metal materials, including copper brazed components.

Some manufacturers of copper-brazed heat exchangers explicitly restrict the use of deionized water.

Therefore, purchasers should not assume that standard copper-brazed heat exchangers are suitable for all high-purity water systems.

If a project requires deionized or ultrapure water, suppliers should evaluate the actual water quality specifications and confirm whether the proposed design is suitable.

2.4 Seawater and Chloride-Based Brines

Seawater and high-chloride brine require special attention.

High chloride concentrations may pose a corrosion risk to stainless steel, particularly under adverse temperature conditions or in the presence of crevices.

Copper brazing may also be unsuitable for certain corrosive saline fluids.

Conventional heat exchangers made of stainless steel and copper brazing should not be considered suitable for direct use in seawater applications.

Depending on the specific application, alternative plate materials or heat transfer technologies may be required.

2.5 Ammonia and Other Refrigerants

Brazed plate heat exchangers can also be used in refrigeration systems.

However, the compatibility requirements for refrigerants differ from those for water-based coolants.

For ammonia refrigeration systems, traditional copper-brazed constructions are generally not suitable because ammonia corrodes copper-containing materials.

For approved ammonia refrigeration applications, certain nickel-brazed or other copper-free heat exchanger designs may be available.

Nevertheless, compatibility must still be verified for specific models, refrigerants, operating pressures, temperature ranges, and relevant refrigeration oils.

Materials described as “nickel-brazed” are not automatically suitable for all ammonia refrigeration applications.

2.6 Specialty Industrial Coolants

Certain projects involve specialized heat transfer fluids, synthetic oils, dielectric fluids, or proprietary chemical mixtures.

These fluids must never be approved solely on the basis that they belong to a broad chemical category.

Their exact formulations, additive combinations, operating temperatures, viscosities, and material compatibility information must be reviewed.

If sufficient compatibility information is not available, the supplier should request additional data or recommend an appropriate technical evaluation before finalizing the selection.

3. Copper-Brazed vs. Nickel-Brazed Heat Exchangers: Which Materials Are Compatible?

3.1 Stainless Steel Heat-Transfer Plates

Stainless steel is commonly selected because of its mechanical properties and corrosion resistance in many industrial environments.

Grades such as 304 and 316/316L are used in plate heat exchanger construction.

However, stainless steel is not universally corrosion-resistant.

Chloride-containing water can create pitting or crevice corrosion risks.

The corrosion behavior depends on the specific alloy, chloride concentration, temperature, pH, and service conditions.

Therefore, even a 316L stainless steel heat exchanger requires water-quality verification.

3.2 Copper Brazing

Copper is widely used to join stainless steel plates in compact brazed heat exchangers.

Copper-brazed construction is suitable for many appropriately controlled water and glycol applications.

However, copper can be affected by certain chemical environments, including:

• Ammonia-containing fluids

• Certain acidic solutions

• Aggressive oxidizing conditions

• Incompatible chemical additives

• Some high-purity water applications

• Certain sulfur-containing environments

The severity of corrosion depends on the complete chemical environment.

Buyers should not rely on a general statement such as "copper is corrosion-resistant" without checking the operating conditions.

3.3 Nickel-Based Brazing

In certain brazed plate heat exchanger designs where copper materials are not suitable, nickel-based brazing alloys are used.

Nickel-based brazing alloys may offer advantages for specific refrigerants or process fluids.

However, nickel-based brazing does not make the heat exchanger resistant to all corrosive chemicals.

The stainless steel plates themselves remain a significant limiting factor, and the nickel alloy must be validated based on the specific coolant conditions.

Suppliers should confirm the specific brazing alloy, plate material, and approved operating conditions.

3.4 Copper-Free Alternatives

When a fluid is incompatible with traditional copper brazing, an alternative heat exchanger configuration may be required.

Options include approved nickel brazing designs, fusion-bonded stainless steel heat exchangers, or other suitable plate heat exchanger technologies.

The correct choice depends on the chemical environment, mechanical requirements, thermal load, and cleaning needs.

It should not be automatically assumed that copper-free designs are suitable for highly corrosive chlorine-containing fluids, as the heat exchange plate material may still have insufficient corrosion resistance.

3.5 Preliminary Material Compatibility Comparison

This table is a preliminary screening guide, not a chemical compatibility certificate.

Final approval must be based on the manufacturer's actual product construction and the specified coolant conditions.

4. What Water-Quality Parameters Affect Coolant Compatibility?

4.1 pH and Alkalinity

pH indicates how acidic or alkaline a fluid is.

Water with an unsuitable pH may increase corrosion risks for certain metallic components.

However, the acceptable pH range depends on the material combination and other dissolved substances.

Alkalinity also influences the behavior of the water system and its response to chemical treatment.

A coolant supplier may specify a recommended pH range for an inhibited glycol mixture.

That range should be checked against the heat exchanger material requirements.

4.2 Chloride Concentration and Temperature

Chloride ions are an important consideration in stainless steel heat exchanger applications.

The risk of localized corrosion generally increases under more aggressive combinations of chloride concentration, temperature, and other chemical conditions.

4.2.1 Why a Fixed Chloride Limit Can Be Misleading

There is no single universal chloride concentration that guarantees the suitability of every stainless steel brazed plate heat exchanger.

The acceptable concentration depends on the exact alloy, water chemistry, temperature, and manufacturer's design guidelines.

4.2.1.1 Why Operating Temperature Changes the Risk

Water that is acceptable for a particular exchanger at a lower temperature may present a greater corrosion risk at a higher temperature.

Consequently, chloride concentration should be evaluated against the maximum credible fluid temperature, not just the normal operating temperature.

For example, a heat exchanger operating during normal cooling at 35°C may experience higher temperatures during another operating mode.

The material compatibility review must account for that possibility.

4.3 Conductivity, Dissolved Salts, and Oxygen

Electrical conductivity provides an indication of dissolved ionic substances in water.

It can be useful for monitoring water quality, but it does not identify which chemical ions are present.

Two fluids with similar conductivity may have different corrosion risks.

Dissolved oxygen and oxidizing substances can also affect the corrosion behavior of metallic components.

The complete operating environment, including makeup water and oxygen ingress, should be considered.

4.4 Ammonia, Sulfur Compounds, and Oxidizing Chemicals

Some water-treatment and process chemicals may be incompatible with copper-containing heat exchangers.

Ammonia is particularly important because of its potential interaction with copper.

Certain sulfur-containing compounds and oxidizing chemicals can also create corrosion risks.

The presence of chlorine-based disinfectants or other oxidizing agents should be disclosed to the heat exchanger supplier.

Chemical compatibility should be assessed using the actual concentrations and exposure conditions.

4.5 Hardness, Scaling, and Suspended Particles

Coolant compatibility is not limited to corrosion.

Hardness minerals can form deposits under suitable conditions, particularly when the water is heated.

Suspended particles may accumulate in narrow plate channels.

These deposits can:

• Reduce effective heat transfer

• Increase fluid-side pressure drop

• Restrict flow distribution

• Create maintenance difficulties

• Contribute to localized corrosion conditions

Because brazed plate heat exchangers normally cannot be opened for plate-by-plate cleaning, fluid cleanliness is especially important.

4.6 Why Water Chemistry Must Be Reviewed as a Whole

A single parameter rarely provides enough information to determine compatibility.

For example, acceptable pH does not compensate for an excessive concentration of another harmful constituent.

Similarly, a suitable chloride level does not guarantee that copper brazing will resist ammonia or an incompatible treatment chemical.

The correct assessment considers the combined effects of water chemistry, material selection, temperature, and operating conditions.

5. How Coolant Properties Affect Thermal and Hydraulic Performance

5.1 Specific Heat Capacity and Cooling Duty

For a single-phase liquid, the heat-transfer duty can be estimated using:

Q = m × Cp × ΔT

Where:

• Q = Heat-transfer duty (kW)

• m = Mass flow rate (kg/s)

• Cp = Specific heat capacity (kJ/kg·K)

• ΔT = Fluid temperature change (K)

Water and glycol mixtures have different specific heat capacities.

Therefore, the same mass flow and temperature change do not necessarily produce the same cooling duty.

5.2 Viscosity and Pressure Drop

Viscosity affects fluid resistance and local heat transfer.

Glycol mixtures commonly have higher viscosity than water under comparable conditions.

At low temperatures, viscosity may increase further.

The heat exchanger should therefore be rated using the actual fluid properties at the relevant operating conditions.

A unit selected using water properties should not automatically be assumed to achieve the same capacity and pressure drop with glycol.

5.3 Minimum Temperature and Freeze Protection

A coolant's freeze-protection properties must match the project's expected temperatures.

The required glycol concentration should consider the lowest credible operating and shutdown temperatures.

However, increasing glycol concentration beyond what the system requires can produce unnecessary hydraulic and thermal penalties.

The concentration should be selected using the coolant manufacturer's recommendations and the complete system requirements.

5.4 Maximum Temperature and Chemical Stability

The maximum operating temperature is also an important factor.

Certain combinations of heat transfer fluids and corrosion inhibitors have temperature limitations.

Exposure to excessively high temperatures may accelerate fluid degradation, alter its chemical properties, or reduce the effectiveness of the corrosion inhibitor.

During the selection process, the maximum temperatures under normal and abnormal operating conditions should be clearly specified.

5.5 Pressure and Thermal Cycling

Material compatibility alone does not establish mechanical suitability.

The heat exchanger must also be appropriate for the operating and design pressures.

Frequent temperature changes and pressure fluctuations can place additional mechanical stress on brazed joints.

The supplier should review expected cycling conditions, pressure transients, and the applicable mechanical design requirements.

6. Step-by-Step: How to Check Coolant Compatibility Before Ordering

6.1 Step 1: Identify the Exact Coolant

Start with the fluid manufacturer's product name and technical documentation.

Request the technical data sheet (TDS) and safety data sheet (SDS).

Where possible, obtain additional material compatibility information.

The SDS alone may not disclose the entire formulation, especially for proprietary additive packages.

Do not treat the SDS as a complete compatibility approval.

6.2 Step 2: Obtain Water-Quality and Additive Information

For water-based fluids, collect the relevant chemistry data.

At a minimum, the requested analysis may include:

• pH

• Conductivity

• Chloride concentration

• Relevant sulfate and other dissolved ions

• Hardness

• Water-treatment additives

• Expected contamination

• Suspended solids

For glycol systems, confirm the glycol type, concentration, dilution-water quality, and corrosion inhibitor package.

6.3 Step 3: Check Every Wetted Material

Identify the heat exchanger's plate alloy and brazing material.

Also review wetted connection materials and other exposed components.

Check the actual coolant chemistry against the material limitations supplied by the exchanger manufacturer.

If any significant information is missing, the compatibility status should remain unconfirmed.

6.4 Step 4: Review the Complete Operating Conditions

Material compatibility must be evaluated at the actual operating conditions.

Provide:

• Normal operating temperature

• Maximum temperature

• Minimum temperature

• Operating pressure

• Design pressure

• Flow rate

• Operating hours

• Expected shutdown conditions

If the coolant experiences different seasonal operating conditions, the review should cover the relevant extremes.

6.4.1 Why Normal Operating Data May Not Be Enough

A system may normally operate at a moderate temperature but experience elevated temperatures during shutdown, fault conditions, or a change in production demand.

The most demanding credible conditions should be considered when assessing material suitability.

6.4.1.1 When to Request a Special Engineering Review

Additional technical evaluation is particularly important for:

• Unknown proprietary coolant formulations

• High-purity water

• High-chloride fluids

• Ammonia service

• Strongly acidic or alkaline fluids

• Unusual chemical additives

• Aggressive cleaning processes

If a supplier cannot establish compatibility, the proposed exchanger should not be treated as approved for that fluid.

6.5 Step 5: Verify Thermal and Hydraulic Performance

After reviewing the relevant documentation, the supplier must determine whether the selected heat exchanger can meet the required heat load.

This involves calculations of fluid properties, temperature conditions, flow rate, and allowable pressure drop.

Chemical compatibility does not automatically guarantee adequate heat transfer performance.

6.6 Step 6: Confirm Maintenance and Cleaning Requirements

The cleaning process may introduce chemicals that are different from the normal coolant.

These chemicals also contact the internal plate surfaces and brazing material.

Before approving a cleaning procedure, verify the compatibility of the cleaning solution, concentration, temperature, and contact time.

For more information, read Aidear's Plate Heat Exchanger CIP Cleaning Guide.

7. Worked Example: Evaluating a Glycol Cooling System

7.1 Hypothetical Project Requirements

Consider an industrial cooling project using a water-glycol solution.

The buyer provides the following information:

These values are hypothetical and do not represent a specific Aidear product's tested performance.

7.2 Initial Compatibility Assessment

The coolant category is not automatically unsuitable for a copper-brazed stainless steel exchanger.

However, the available information does not establish compatibility.

Several important details remain unknown.

The supplier needs to verify the water-quality composition and confirm that the inhibitor package is appropriate for the proposed wetted materials.

The maximum operating temperature must also be considered.

The final thermal calculation cannot be completed until the required cooling duty and flow conditions are established.

7.3 What Should the Buyer Do Next?

The buyer should request the following information from the coolant supplier:

1. Current technical data sheet

2. Material compatibility recommendations

3. Detailed water-quality requirements

4. Corrosion inhibitor information

5. Fluid properties over the intended temperature range

The heat exchanger supplier can then review the proposed construction and identify whether additional testing, an alternative brazing material, or a different exchanger design is required.

The correct conclusion is "compatibility pending verification," not "approved" simply because the coolant contains propylene glycol.

8. Brazed Plate Heat Exchanger Coolant Compatibility RFQ Checklist

Before requesting a quotation, buyers should prepare the following information.

8.1 Fluid Compatibility Data

8.2 Thermal, Hydraulic, and Mechanical Data

8.3 Ready-to-Use RFQ Template

The following information can be included in a technical inquiry.

Project Application: [Industrial Cooling / HVAC / Refrigeration / Data Center Cooling / Other]

Required Heat Exchanger: Brazed Plate Heat Exchanger

Cooling or Heating Duty: [kW]

Hot-Side Fluid: [Exact Product Name]

Cold-Side Fluid: [Exact Product Name]

Fluid Manufacturer: [Brand / Supplier]

Glycol Type and Concentration: [If Applicable]

Chemical Additives: [Product / Inhibitor Information]

Water-Quality Report: [Attached / Pending]

Hot-Side Inlet and Outlet Temperatures: [°C]

Cold-Side Inlet and Outlet Temperatures: [°C]

Hot-Side Flow Rate: [m³/h]

Cold-Side Flow Rate: [m³/h]

Operating Pressure: [bar]

Required Design Pressure: [bar]

Allowable Pressure Drop: [kPa]

Maximum and Minimum Operating Temperatures: [°C]

Preferred Plate Material: [Specify / Request Recommendation]

Preferred Brazing Material: [Copper / Nickel / Request Recommendation]

Cleaning Chemicals: [If Applicable]

Required Dimensions and Connections: [Specify]

Additional Compatibility Concerns: [Specify]

Technical Documents Attached: [TDS / SDS / Water Analysis / System Drawing]

The supplier should identify any assumptions or outstanding compatibility issues before confirming the final equipment selection.

9. Common Mistakes When Checking Coolant Compatibility

9.1 Assuming All Stainless Steel Heat Exchangers Are Chemically Resistant

Stainless steel grades have different corrosion characteristics.

Even 316L stainless steel can experience localized corrosion under unfavorable conditions.

The brazing material must also be checked.

9.2 Selecting Only by Coolant Name

The name of a glycol or water-treatment product does not fully describe its concentration, additives, or operating condition.

Compatibility should be based on the actual product formulation.

9.3 Ignoring Chloride Concentration at Higher Temperatures

Water chemistry that appears acceptable at a lower temperature may become more aggressive when the operating temperature rises.

The complete temperature range should be evaluated.

9.4 Assuming Nickel Brazing Solves Every Corrosion Problem

Nickel-based brazing may be suitable for certain applications where copper is unsuitable.

However, the plate material, fluid chemistry, and operating conditions still determine compatibility.

Nickel brazing should not be treated as a universal corrosion-resistant solution.

9.5 Ignoring Cleaning Chemical Compatibility

A heat exchanger may be compatible with the normal coolant but not with an aggressive cleaning solution.

Cleaning chemicals must be assessed independently before use.

10. Frequently Asked Questions About Brazed Plate Heat Exchanger Coolants

10.1 Can a Brazed Plate Heat Exchanger Use Ethylene Glycol?

Yes, many brazed plate heat exchangers are used with compatible inhibited ethylene glycol solutions.

However, the glycol concentration, inhibitor formulation, water chemistry, and operating temperatures must be checked.

The exact model should be approved for the intended fluid.

10.2 Is Propylene Glycol Compatible With Copper-Brazed Heat Exchangers?

It may be compatible when the solution is appropriately formulated and maintained.

The glycol type alone does not establish compatibility.

The complete coolant formulation and operating conditions should be reviewed.

10.3 Can Deionized Water Be Used in a Brazed Plate Heat Exchanger?

Some copper-brazed manufacturers restrict the use of deionized water because of possible interaction with the brazing material.

Compatibility cannot be assumed.

The buyer should provide the water purity specification and obtain approval for the exact proposed exchanger construction.

10.4 Is Nickel Brazing Better Than Copper Brazing?

Not in every application.

Nickel brazing can provide an alternative for certain fluids that are unsuitable for copper-brazed construction.

However, the preferred material depends on the chemical environment, operating conditions, equipment design, and commercial requirements.

10.5 Can a Copper-Brazed Plate Heat Exchanger Be Used With Ammonia?

Conventional copper-brazed construction is generally not suitable for ammonia service.

An approved nickel-brazed or other suitable copper-free construction may be required.

The specific exchanger must be verified for ammonia, its pressure and temperature conditions, and the complete refrigeration system.

10.6 Does a Lower Chloride Concentration Guarantee Compatibility?

No.

Chloride is one important parameter, but corrosion behavior also depends on temperature, pH, oxygen, other dissolved substances, and construction materials.

A low chloride concentration alone does not guarantee that the fluid is compatible.

10.7 How Can Buyers Confirm Compatibility Before Purchasing?

The most reliable approach is to provide the supplier with accurate information on the fluid products, water quality analysis data, chemical additives, operating temperature, pressure, and flow rate requirements.

The supplier should then evaluate these conditions based on the materials and performance specifications of the heat exchanger to be used.

If compatibility remains uncertain, further technical evaluation is required before final approval.

11. Conclusion: Coolant Compatibility Should Be Verified Before Final Heat Exchanger Selection

Coolant compatibility is an essential part of selecting a reliable brazed plate heat exchanger.

The correct evaluation involves more than identifying whether the working fluid is water, glycol, refrigerant, or another chemical mixture.

Engineers and industrial buyers must consider the complete fluid composition, operating conditions, and all materials exposed to the coolant.

Important selection factors include:

• Stainless steel plate grade

• Copper or nickel-based brazing material

• Coolant formulation and concentration

• pH, chloride concentration, and water quality

• Corrosion inhibitors and other additives

• Minimum and maximum operating temperatures

• Fluid viscosity and thermal properties

• Fouling and cleaning requirements

• Operating and design pressures

A coolant that is thermally suitable is not necessarily chemically compatible, and a chemically compatible fluid does not automatically guarantee the required heat exchanger performance.

Both aspects must be verified before the final equipment selection.

11.1 Explore Brazed Plate Heat Exchanger Solutions From Aidear

Changzhou Aidear Refrigeration Technology Co., Ltd. supplies brazed plate heat exchanger solutions for industrial cooling, HVAC, refrigeration, and heat recovery applications.

Depending on the specific product design and availability, different plate and brazing material configurations may be considered for various operating requirements.

Selecting a suitable exchanger begins with reviewing the actual coolant properties, operating conditions, heat-transfer duty, and hydraulic requirements.

Explore Aidear Brazed Plate Heat Exchangers for more information about available products.

For applications requiring accessible plate cleaning or a different material configuration, you can also explore our Gasketed Plate Heat Exchangers.

11.2 Request a Custom Brazed Plate Heat Exchanger Quote

Are you unsure whether your coolant is compatible with a copper-brazed or nickel-brazed plate heat exchanger?

Share your fluid name, chemical composition, temperature range, flow rates, heat duty, and available water-quality data with Aidear.

Our team can review your application requirements and discuss suitable product options, subject to technical compatibility verification and product availability.

Request a Custom Quote — Find a Brazed Plate Heat Exchanger Suitable for Your Cooling Application.