The differences between these plate heat exchangers are following:

Brazed Plate Heat Exchangers (BPHEs):

• Plates are sealed by brazing with copper or nickel
• Permanent bond, cannot be disassembled for cleaning or repair
• Higher temperature and pressure limits
• More compact and lightweight
• Lower leak risk
• Typically lower initial cost

Gasketed Plate Heat Exchangers (GPHEs):

• Plates are sealed with gaskets
• Can be opened for cleaning, repair, or replacement of plates and gaskets
• Limited by gasket material's temperature and pressure tolerance
• Larger and heavier than BPHEs
• Slightly higher leak risk due to potential gasket failure
• May have higher upfront cost but can be more economical long-term if frequent maintenance is required