Apeks XTX40/DS4

DS4 1st stage

Dry sealed system for cold water.
No turret.
4 medium pressure ports 3/8 UNF

1 high pressure port 7/16 UNF

DIN version

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. 

XTX40 2nd stage:

Integrated venturi control
Pneumatically balanced valve design
Suitable for cold water use
Bright Chrome Finish
Right or Left hand hose configuration
Two shot plastic front cover
Changeable Exhaust Tees (DCE, Diver Changeable Exhaust) (only one set supplied)