Welded Heat Exchanger

Welded heat exchangers are durable, high-performance solutions designed for processes involving extreme pressures, temperatures, or aggressive media. By eliminating gaskets and using fully welded plate or tubular structures, these exchangers ensure complete leak-tightness and exceptional mechanical strength. Each unit is engineered for optimal efficiency and reliability, combining compact design with superior thermal performance. This construction allows long service life and stable operation even in the most demanding industrial environments, including chemical, petrochemical, and energy applications.

High Thermal Efficiency – Thin plates and narrow channels provide superior heat transfer rates.
Compact and Lightweight – Small footprint with powerful performance for space-limited systems.
Leak-Free Design – Brazed joints eliminate the need for gaskets and reduce leakage risk.

High Pressure and Temperature Resistance – Suitable for demanding HVAC and refrigeration applications.
Low Maintenance Requirements – Sealed design prevents contamination and requires no regular servicing.
Energy Efficient – Minimizes energy consumption due to its excellent heat recovery capability.

Applicable Industries

Refrigeration and Heating, Ventilation, and Air Conditioning (HVAC)

Serves as evaporators, condensers, and key equipment in district heating/cooling systems.

Chemical and process industries

Used for heating, cooling, and heat recovery of materials.

Food and Beverage Industry

Used for pasteurization, juice cooling, and other applications, it is easily disassembled and cleaned, meeting hygiene standards.

Metallurgy and Machinery Industry

Used for cooling process circulating water, lubricating oil, etc.

Ships

Used as central coolers and lubricating oil coolers, their compact design is ideal for space-constrained ship cabins.

Geothermal Energy Utilization

Efficiently extract geothermal energy by leveraging its small temperature gradient for heat exchange.

How It Works

Welded heat exchangers operate by transferring heat between two fluids separated by thin metal walls that are permanently joined through precision welding. This fully sealed structure eliminates the need for gaskets, ensuring complete leak-tightness even under extreme temperature and pressure conditions. Depending on the design—plate or tubular—the fluids flow through carefully engineered channels that promote efficient turbulence and uniform heat distribution. The result is stable thermal performance, exceptional mechanical strength, and long service life in the harshest operating environments.

Strength and Reliability in Demanding Applications

Unlike gasketed or brazed models, welded heat exchangers are built for heavy-duty industrial use, handling corrosive fluids, high pressures, and aggressive media without risk of leakage. Their compact, space-saving design delivers high thermal efficiency while maintaining excellent durability. With optimized flow paths and advanced welding technology, they offer dependable performance, minimal maintenance, and outstanding resistance to thermal fatigue—making them the preferred choice for chemical processing, power generation, oil and gas, and other critical industrial applications.

Frequently asked questions about Welded Heat Exchanger

What materials are used in the construction of Brazed Plate Heat Exchangers?

Plates are typically made from 316 stainless steel for excellent corrosion resistance and durability. The brazing material is copper (standard) or nickel (for aggressive fluids like ammonia or high-chloride environments), creating a fully sealed, vacuum-brazed joint.

What is the maximum operating pressure and temperature for Brazed Plate Heat Exchangers?

Standard copper-brazed models support up to 30 bar (435 psi) and 225°C (437°F). Nickel-brazed versions can handle up to 30 bar and 350°C (662°F). Exact limits depend on model size and connection type—consult our pressure-temperature rating charts.

How does a Brazed Plate Heat Exchanger differ from a gasketed plate heat exchanger?

Brazed units are permanently sealed with no gaskets, offering compact size, higher pressure/temperature capability, and lower maintenance. Gasketed models allow plate disassembly for cleaning and are better suited for applications requiring frequent servicing or fluid changes.

Can Brazed Plate Heat Exchangers be used with corrosive or aggressive fluids?

Yes, with proper material selection. Copper-brazed models suit water, glycols, and oils. Nickel-brazed models are recommended for ammonia, deionized water, or fluids with high chloride content. Always verify fluid compatibility using our chemical resistance guide.

What are the typical applications and thermal efficiency advantages of Brazed Plate Heat Exchangers?

Ideal for HVAC (chillers, heat pumps), refrigeration, district heating, oil cooling, and process industries. Their corrugated plate design achieves approach temperatures as low as 1–2°C (1.8–3.6°F) with heat transfer coefficients 3–5 times higher than shell-and-tube units in the same duty.

Welded Heat Exchanger

Features

PRODUCT SHOWCASE

Brazed Plate Heat Exchanger

Brazed Plate Heat Exchanger

Semi-welded Plate Heat Exchanger

Fully Welded Plate Heat Exchanger

Heat Exchanger

Applicable Industries