Plate Heat Exchanger Product Catalogue of Guangzhou Kechao

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Plate Heat Exchanger, PHE, is an efficient and compact heat transfer device. Its core consists of a stack of corrugated metal plates. Thin rectangular channels are formed between plates, where hot and cold fluids flow alternately to realize heat transfer.

Key Features

1. High heat transfer efficiency

• Corrugations (herringbone, horizontal, etc.) are pressed on plate surfaces, which induce turbulent flow of fluids and deliver high heat transfer coefficients (up to 3000–7000 W/(m²·K)).
• Counterflow arrangement: the unit achieves a large logarithmic mean temperature difference and high heat recovery efficiency (over 90%).

2. Compact structure & small footprint

• Teat transfer area per unit volume can reach 150–250 m²/m³, approximately 3–5 times that of shell-and-tube type.
• Lightweight, requiring minimal installation space.

3. Flexible and adjustable

• Quantity of plates can be adjusted based on working conditions for convenient modification of heat transfer area.
• A wide range of plate materials and corrugation types are available to suit different media and working conditions.

4. Easy to clean and maintain

• Demountable structure; plates can be removed for cleaning by loosening clamping bolts.
• Suitable for scaling-prone fluids and fluids with impurities.

5. Excellent sealing performance

• Rubber or fluororubber gaskets are used for sealing between plates, resulting in fewer leakage points.
• Internal leakage can be detected via observation ports.

6. Limitations

• Limited pressure resistance (generally ≤ 2.5 MPa, up to 4 MPa with special design).
• Limited temperature resistance, determined by gasket material, normally ranging from −25°C to 180°C.
• Not suitable for fluids containing large amounts of fibers or particles (risk of channel clogging).
• Sealing gaskets require periodic replacement.

Main Applications

Application Field	Typical Operating Conditions
HVAC	district heating / cooling, building air conditioning systems, ice thermal storage, ground-source heat pumps
food & beverage	milk pasteurization, juice cooling, beer brewing, edible oil heating
chemical & pharmaceutical industries	reactor temperature control, solvent recovery, crystallization process, API cooling
power & energy	closed-circuit cooling in power plants, waste heat recovery, solar hot water systems
marine & offshore	main engine cooling, fresh water generator, lube oil cooling
metallurgy & machinery	quenching liquid cooling, hydraulic oil cooling, rolling mill lube oil cooling
paper & textiles	bleaching liquor heating, dye cooling, wastewater waste heat recovery
refrigeration	evaporators, condensers, economizers (e.g. ammonia refrigeration systems)

Common Types

Type	Feature	Applicable Scenario
Gasketed Plate Heat Exchanger	Plates can be removed for cleaning, enabling easy maintenance.	Service conditions prone to scaling and demanding frequent cleaning.
Brazed Plate Heat Exchanger	Copper/nickel brazed sealing, gasket-free, capable of withstanding high pressure.	Refrigerant systems, small flow and high pressure conditions.
Fully Welded Plate Heat Exchanger	Laser / TIG welded construction, gasket-free, resistant to high temperature and high pressure.	High temperature, corrosive media and high pressure working conditions
Semi-Welded Plate Heat Exchanger	Plate pairs welded + sealing gaskets, combining the advantages of both designs	Ammonia refrigeration, hazardous media service

Selection Key Points

Comprehensive considerations for selection:

• ●Medium characteristics: corrosivity, viscosity, solid content, temperature & pressure.
• ●Heat load & temperature difference: confirming required heat transfer area.
• ●Pressure drop requirement: deeper corrugations on plates improve better heat transfer but result in higher pressure drop.
• ●Material selection: Stainless steel (304/316), Titanium, Hastelloy, SMO254, etc.
• ●Sealing gasket：NBR, EPDM, Viton, PTFE, etc., selection shall match medium & temperature.