TUSA Scuba Diving Regulator Set Yoke RS-790 1st Stage S-90 2nd Stage Second 1467

Tusa Regulator Set Yoke RS-790 first stage (Balanced) S-90 Primary Second Stage (Balanced, Environmentally Sealed) Includes Standard BC Inflator Hose Works Great! The Tusa RS-790 Regulator delivers performance, durability and comfort making it the ideal choice for discerning divers. The R-790 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 maximizing performance in temperate water conditions below 50°F/10°C. Additionally, 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 air flow. The S-90 second stage is a compact pneumatically balanced system that features a composite housing which insulates and protects under extreme cold-water conditions. The S-90 is equipped with 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. The Tusa RS-790 Regulator offers the following Features: Dry Ambient Pressure Chamber The dry ambient pressure chamber on the R-700 prevents water contact with the diaphragm and spring maximizing performance, at any depth, in cold water conditions below 50°F/10°C. Ideal For Cold Water Environments The R-790 is engineered for cold water diving. It features a ribbed top cap section that acts like a radiator to increase the surface area for heat transfer. This design allows warming of the critical internal first stage parts that can freeze due to the gas pressure drops and low temperatures. High Flow Ports Two high flow low pressure ports are available on the R-790 in addition to two standard LP ports and 2 HP ports. The high flow ports are positioned near the diaphragm and offer up to a 15% increase in air flow. S-90 Second Stage Pneumatically Balanced System The S-90 second stage is a pneumatically balanced design. A small chamber positioned at the end of the poppet assembly traps air and forces the poppet back against the intermediate pressure orifice. This provides decreased inhalation resistance and increases smooth breathing in all conditions. Venturi Adjustment Lever The S-90 is equipped with a built-in Venturi adjustment lever. Two ... Featured Refinements: Dive Regulator Brand: TUSA Tested, Works, No Leaks. All used scuba equipment should be inspected or serviced by a professional before using.