- Balanced flow valve provides constant & effortless airflow
- Diver adjustable inhalation control enables personal adjustment of breathing effort
- Diver adjustable Venturi Initiated Vacuum Assist (VIVA) dive/pre-dive control switch and extra high flow exhaust valve account for easy inhale & exhale
- Super-flow hose for smooth air delivery
In addition, precision-molded, lightweight components, and anti-freeze materials provide high corrosion resistance and enhance cold water performance.
Air balanced flow-through piston. The first stages with air-balanced pistons deliver significantly more air to the second stage than any other first stage, while their performance is totally unaffected by the changing tank pressure. A balanced piston allows the use of lighter and more sensitive components, resulting in ultra-fast breathing response, instant delivery of air on demand, and extra-high airflow, especially in low tank pressure ranges. The tired diver benefits from a smoother breathing regulator during the ascent or deco stop. Balanced piston first stages are the first choice of demanding sport divers and professionals. A balanced piston performs equally in warm and cold water environments.
Two opposite high-pressure ports. The arrangement of high and low-pressure hoses is crucial to diving comfort. Two opposite high-pressure ports allow for individual positioning of the first stage (pointing up or down). This allows the diver to position the gauges either on the right or left side and increases the freedom of movement for the head and neck.
Multiple low-pressure ports. For ultimate freedom in the arrangement of low-pressure hoses, the MK25 accommodates five HF (high flow) ports on a swiveling turret, which allows for a 360-degree swivel of hoses. High-flow ports deliver about 15% more air than conventional ports.
Cold Water Diving With SCUBAPRO. Diving conditions can be drastically different, including extreme cold water and outside temperatures, posing the possibility of a regulator "freezing". Therefore, resistance to freezing is imperative for the diver. All SCUBAPRO regulator systems are CE approved for 4300psi cold water diving. As a specific anti-freezing measure, SCUBAPRO engineers have designed a patented finned cap for the MK25 first stage for optimal cold water diving. The ribs act as a radiator to increase the surface area of heat transfer from the water to warm up the internal parts that have been drastically cooled down by the gas pressure drop. For cold water diving, SCUBAPRO’s second stages feature precision molded carbon fiber and technopolymer valve housing and components. They even exceed the CE cold water norm. In addition, these components contribute to their lightweight features and corrosion resistance.
Air-balanced valve technology. The air-balanced valve technology of SCUBAPRO’s second stages features a balancing chamber in the second stage mechanism, slightly offsetting the force of the downstream air entering from the first stage. This allows reduced spring tension and decreases the inhalation resistance to the lowest possible level. The result is super smooth breathing in all conditions. The air-balanced valve technology is featured in the X and S-Series second stages.
Diver adjustable inhalation effort. This feature enables the diver to adjust breathing effort via an oversized control knob.
Venturi Initiated Vacuum Assist (VIVA). Another SCUBAPRO patented feature, the VIVA is available on all SCUBAPRO second stages. VIVA uses the power of a vacuum assist to reduce the work of breathing and increase breathing comfort. A VIVA in MAX position gives powerful breathing support on every single breath; a VIVA in MIN position helps to prevent free flow on the surface, for training, for buddy breathing, in currents, or when used as an octopus.
Orthodontic mouthpiece. SCUBAPRO uses a comfortable orthodontic mouthpiece on every second stage to reduce jaw fatigue and gum irritation. It was developed by dentists and dental laboratories and lasts longer than any other mouthpiece because only a minimum effort is needed to hold it comfortably in place.
|Air balanced flow-through piston|
|Chrome plated brass body|
|Low pressure (LP) ports: 5|
|High pressure (HP) ports: 2|
|Swivelling turret with LP ports|
|Externally adjustable intermediate pressure|
|Air balanced valve technology|
|Precision molded carbon fiber and technopolymer housing|
|Nitrox compatible up to 100% oxygen concentration|
|Divers adjustable inhalation effort|
|Divers adjustable VIVA (Venturi Initiated Vacuum Assist)|
|Sturdy super-flow hose with kevlar lining for extra durability and flawless air delivery|
|High comfort orthodontic mouthpiece|