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S600 Second Stage SCUBAPRO's Air-Balanced Linear-Flow Valve technology represents the ultimate in air flow performance. Based on SCUBAPRO's proven downstream linear valve design, the air-balanced version adds a pneumatic balancing chamber to offset the force of downstream air entering from the first stage. Balancing reduces the spring tension required to hold the flow valve closed, while maintaining sufficient pressure to allow for the safety of a downstream override. Because spring tension is the primary cause of inhalation resistance, the smaller, lighter spring used in SCUBAPRO's Air-Balanced Linear-Flow Valve can provide the lowest possible inhalation effort. The result is an ultra-high air flow that remains exceptionally stable under all breathing conditions. • Technopolymer Body and Components • Peak Performance Air Balancing System • Air-Balanced Linear-Flow Valve • Automatic Anti-Set Feature • Diver-Adjustable VIVA • High-Flow Exhaust Valve • Diver-Adjustable Inhalation Effort Control • Lightweight, Compact Size • Ergonomic, Safe-Grip Mouthpiece First stage Mk 25 SCUBAPRO's premier-performance Air-Balanced Flow-Through Piston technology, SCUBAPRO's proprietary design allows air to flow directly through the hollow interior of the piston shaft, rather than diverting incoming high pressure around the piston and seating mechanism like conventional piston designs. This technology delivers two significant performance advantages. First, because the piston is unaffected by changes in pressure, the SCUBAPRO regulator can deliver a consistent air flow to the second stage regardless of changes in tank pressure. This also allows SCUBAPRO to use lighter spring and poppet actions to achieve some of the most sensitive yet reliable second stages available in the world. Second, because the flow-through piston design creates a more direct air path, a SCUBAPRO regulator is able to deliver significantly higher quantities of air on demand. Fact is, independent and government laboratory tests have repeatedly shown the real-world performance advantages of SCUBAPRO's patented flow-through technology. • Chrome-Plated Marine Brass • Air-Balanced Flow-Through Piston Design • Patented Composite/Stainless Steel Piston • Thermal Insulating System (TIS) • Externally Adjustable Intermediate Pressure • 5-Port LP Swivel • Dual HP Port
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