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 Select Zone » Catalog » Regulators » Spare 1st and 2on stages »   





All products from catalog Apeks

 2 year guarantee
Available Models
  Model Price
DIN 133,96€

First Stages - DS4
Dry sealed system for cold water.

No turret.

4 medium pressure ports 3/8 UNF

1 high pressure port 7/16 UNF 
As the diver descends the demand for air increases. To maintain the supply, the intermediate pressure increases relative to the water depth. In this dry sealed system hydrostatic pressure, acting on the outer sealing diaphragm, is transmitted to the primary diaphragm via the load transmitter. This first stage utilizes a unique over-tracking (over-balanced) diaphragm design, where the intermediate pressure supplied to the second stage increases more than traditional balanced models, as the diver descends to greater depths. The result is superior breathing performance regardless of depth.

All our first stages are available in both DIN and A clamp versions.

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