Diaphragm first stages have been the favored choice of cold-water divers because of their better resistance to freezing.
Diaphragm first stages are also recommended for those working in water containing a high degree of suspended particles, silt, or other contaminating materials.
All our diaphragm first stages feature balanced technology and are packed with original features that deliver fast flow to the second stage upon demand and good overall performance.
This technology is used on:
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