Regulator Scubapro MK17 EVO First Stage | Regulator Scubapro First Stage MK17 EVO

Description

Regulator Scubapro First Stage MK17 EVO

A high performance balanced diaphragm first stage regulator, the MK17 EVO has been engineered for harsh environments and for use in ice cold water or polluted environments. Resistance to cold has indeed been a key element in the engineering of the MK17.

The Diaphragm Technology

Diaphragm-based first stages are environmentally sealed so that water cannot enter the inner mechanism. Bearing in mind that regulators generate temperatures up to minus 30°C due to the incredibly fast moving air and the pressure drop involved, it is imperative that sensitive moving metal parts avoid contact with extremely cold water.

Therefore, diaphragm first stages have been the favoured choice of cold-water divers and those working in contaminated or muddy water.
SCUBAPRO diaphragm first stages feature balanced technology and are packed with patented features resulting in ultra fast flow to the second stage on demand and a fantastic overall performance.

Dry ambient pressure chamber, providing  better performance in cold water than any other diaphragm regulator. The diaphragm design prevents the entry of water into  the first stage mechanism and enhances  a trouble-free operation, even in the coldest conditions.

MK17 EVO First Stage: Technical Information

• Air balanced diaphragm delivers constant and effortless airflow unaffected by depth, tank pressure, or breathing rate.
• Environmentally sealed system prevents water and pollutants from fouling the inner mechanism.
• More compact design features a smaller dry ambient pressure chamber and spring, although the bulletproof inner parts remain the same.
• Dry ambient pressure chamber increases freezing resistance, ensuring consistent airflow in the coldest conditions.
• Substantial increase in airflow -- 6900 l/min versus 6500 l/min - includes improved balance of air supply pressure.
• Two high pressure and four high-flow ports maximize air delivery and hose routing options.
• High-flow performance is available from all four LP ports which are configured for optimum hose routing.
• Available in a 3364psi/232bar INT configuration.
• Weight: INT 232 - 30oz/850g.
• Airflow at 2900psi/200bar: 6900 l/ min - 230 SCFM.
• Intermediate pressure (psi/bar): 130-142/9.0-9.8.

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 300bar cold water diving. Some models go even beyond this super stringent qualification and have successfully been tested in extreme cold diving conditions at less than 2°C.

As a specific anti-freezing measure, SCUBAPRO engineers have designed a patented finned cap for both the MK17 and the MK25 first stages 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.

On the MK17, a dry ambient pressure chamber enhances the resistance to real ice cold water at any depth compared to other dry chamber diaphragm first stages.

For cold water diving, SCUBAPRO’s second stages feature precision moulded 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.