The RS-790 delivers performance, durability and comfort, making it the ideal choice for discerning divers. The R-700 is a balanced diaphragm first stage designed for cold-water use; it features a dry ambient pressure chamber that prevents water contact with the diaphragm, maximising performance in temperate water conditions below 50°F/10°C.
The R-700 has an external rib section that nearly doubles the surface area for thermal exchange, further reducing ice formation that can lead to freeze-up in extreme conditions. The R-700 has two high-pressure ports and four low-pressure ports, including two high-flow (HF) that deliver up to a 15% increase in airflow.
The S-90 second stage is a compact pneumatically balanced system with a composite housing insulating and protecting under extreme cold-water conditions. The S-90 has a built-in venturi adjustment lever, allowing the diver to select a surface or minimum setting, reducing possible free flow or a dive setting for maximum air flow during the dive.
First stage (R-700)
- Balanced diaphragm first stage with anti-freeze system
- Dry ambient pressure chamber ideal for temperatures below 50°F/10°C
- Ribbed section to increase heat transfer and resist freezing
- Two H.P. ports and Four L.P. (2 standard/2 high flow) ports
- High flow L.P. ports offer up to 15% increase in air flow
Second stage (S-90) Specs:
Since 2023, this set is only available in Yoke.
