Regulator – MK25 EVO/S620Ti

The SCUBAPRO MK25 EVO / S620 Ti represents the pinnacle of SCUBAPRO regulator design, combining maximum airflow, ultra-responsive breathing, and advanced cold-water protection in a refined, lightweight system. Pairing the MK25 EVO balanced piston first stage with the ultralight S620 Ti second stage, this regulator is engineered for divers who expect uncompromising performance in every environment—from warm tropical waters to extreme cold.

At the heart of the system is the MK25 EVO first stage, featuring an air-balanced, flow-through piston design housed in a chrome-plated brass body. This configuration delivers instant air delivery on demand, completely unaffected by depth, tank pressure, or breathing rate. SCUBAPRO’s patented XTIS (Extended Thermal Insulating System) thermally insulates internal components from the surrounding environment, dramatically improving resistance to freezing while preserving exceptional breathing performance. Combined with advanced anti-freeze protection, the MK25 EVO remains reliable even in the coldest diving conditions.

Optimized for versatility, the MK25 EVO includes two opposing high-pressure ports and a swivel turret with four high-flow low-pressure ports plus one axial super high-flow LP port, offering unmatched hose routing flexibility for recreational, technical, or stage bottle configurations. An external intermediate pressure adjustment allows technicians to fine-tune performance quickly and precisely.

The S620 Ti second stage builds upon the legendary S600 platform with a more compact, modern design. Smaller and lighter—yet using the same large diaphragm—the S620 Ti delivers effortless, ultra-sensitive airflow at all depths. Its full titanium inlet tube reduces weight while offering superior corrosion resistance and long-term durability. A reengineered exhaust tee improves exhalation performance while directing bubbles away from the diver’s field of view, and the large purge button enhances water circulation for easier clearing.

User-adjustable controls include an easy-grip inhalation effort knob and Venturi-Initiated Vacuum Assist (VIVA) lever, allowing divers to fine-tune airflow and prevent freeflows in strong currents or cold water. The compact Hi-Flow mouthpiece, exclusive to the S620 Ti, improves airflow and long-term comfort, even on extended dives.

Key Features & Benefits

• Balanced piston MK25 EVO first stage for instant, unrestricted airflow

• XTIS thermal insulation system dramatically improves cold-water performance

• Advanced anti-freeze protection for extreme diving conditions

• Swivel turret with 5 LP ports + 2 HP ports for maximum hose routing flexibility

• Externally adjustable intermediate pressure for precise tuning

• Balanced S620 Ti second stage with ultra-responsive breathing performance

• Full titanium valve housing for lightweight strength and corrosion resistance

• Large diaphragm in compact casing for exceptional breathing sensitivity

• User-adjustable inhalation knob & VIVA lever for personalized control

• Nitrox compatible up to 40% O₂

Designed for advanced recreational, technical, and professional divers, the SCUBAPRO MK25 EVO / S620 Ti Regulator System delivers world-class performance, reliability, and refinement. In any water temperature, under any diving conditions, this regulator system stands as a true benchmark in breathing excellence.