Why choose a brazed plate heat exchanger over a gasketed one?

Brazed units are far more compact and lighter than a gasketed unit of equivalent duty, since there is no frame, tie bolts, or gaskets. They are the standard choice for HVAC, chiller and refrigeration duties with clean fluids where space and weight matter.

Can a brazed plate heat exchanger be opened for cleaning?

No. Brazed units are a sealed, non-serviceable block. Cleaning is done by chemical circulation if needed, and the unit is best suited to clean fluids that are not prone to heavy fouling.

Should I choose copper or nickel brazing?

Copper brazing is standard for most HVAC and refrigeration duties. Nickel brazing is used where the process fluid is not compatible with copper, such as some domestic water or food-adjacent applications, or where higher corrosion resistance is needed.

What temperature range can a brazed PHE handle?

Typically from around -160 deg C up to 200 deg C depending on the specific duty and design, covering both low-temperature refrigerant evaporators and higher-temperature water or process duties.

What information do you need for a quotation?

Fluids on both sides (including refrigerant type if applicable), flow rates, inlet/outlet temperatures, operating pressure, and connection type preference.

Brazed Plate Heat Exchanger

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Brazed Plate Heat Exchanger

SRJ brazed plate heat exchangers fuse stainless steel plates together with a copper or nickel braze, forming a compact, fully sealed, gasket-free unit ideal for HVAC, refrigeration and space-constrained installations.

A brazed plate heat exchanger (BPHE) is made from a stack of stainless steel plates bonded together in a vacuum brazing furnace, typically using copper as the braze filler material, or nickel for duties where copper is not compatible with the process fluid. The result is a single, rigid, fully sealed block with no gaskets and no frame, in the way a gasketed or welded unit needs.

Because there is no frame, no tie bolts, and no gasket material, brazed plate heat exchangers are significantly smaller, lighter, and lower cost than an equivalent gasketed or welded unit for the same duty. The compact size and light weight make them the standard choice wherever space and weight are at a premium, and where the duty and fluid quality fit within a sealed, non-serviceable design.

The trade-off is that a brazed unit cannot be opened, re-plated, or re-gasketed. If the plate pack fouls or is damaged, the entire unit is replaced rather than serviced, so BPHEs are best suited to clean fluids on both sides, such as refrigerants, water, glycol and other HVAC or refrigeration process fluids, rather than dirty or fouling industrial streams.

Copper-brazed units are the standard for most HVAC and refrigeration duties, while nickel-brazed units are used where the fluid is not compatible with copper, such as in some domestic hot water, food-grade, or mildly aggressive water treatment applications.

SRJ supplies brazed plate heat exchangers for chillers, heat pumps, condensers, evaporators, and district cooling interface duties, with each unit factory pressure tested before dispatch and mounting brackets or connection adaptors available to match your existing pipework.

Technical Specifications

Parameter	Range / Options
Plate Material	AISI 316 / 316L stainless steel
Braze Material	Copper (standard) or Nickel (for copper-incompatible fluids)
Construction	Fully brazed, gasket-free, frameless compact block
Max Design Pressure	Up to 30 bar
Max Temperature	-160 deg C to 200 deg C (duty dependent)
Connection Sizes	Threaded / flanged / brazed stub connections
Typical Duty	Refrigerants, water, glycol, HVAC and process fluids
Cleaning Method	Non-serviceable; chemical circulation only

Where This Is Used

Chillers & Heat Pumps

Evaporator and condenser duty in packaged chillers and air-to-water or water-to-water heat pumps.

Commercial HVAC

Compact plant room heat exchange for chilled water, condenser water and heat recovery circuits.

District Cooling Interface

Hydraulic separation between district cooling networks and building-side systems in a compact footprint.

Refrigeration Systems

Compact condensers and evaporators for commercial and light industrial refrigeration packages.

Space-Constrained Installations

Skid-mounted and OEM equipment where weight and footprint are critical design constraints.

Frequently Asked Questions

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