Ammonia Systems

Ammonia Systems

Semi-Welded and Nickel Brazed Construction

Ammonia systems need heat exchangers whose refrigerant-side construction excludes copper and gaskets entirely.

Semi-welded packs. Two plates laser welded into a cassette contain the ammonia; conventional gaskets between cassettes carry the water or glycol. The refrigerant never touches an elastomer and the secondary side still opens for cleaning.

Nickel brazed units. For smaller duties, a nickel brazed unit gives compact sealed construction with no copper anywhere. It cannot be opened, so the secondary fluid must be clean.

System context. Suction and discharge conditions, oil management, relief arrangements and the secondary fluid all belong in the same conversation as the exchanger selection.