MK25SA First Stage
- Body machined and yoke forged from a special aluminum alloy
- Yoke screw, yoke retainer, swivel and seat adjustment parts are stainless steel
- A special stainless steel adapter located on one high pressure port is for attachment of the standard pressure gauge
- Patented over-balanced composite/stainless steel piston
- TIS (Thermal Insulating System) on piston and spring
- Externally adjustable intermediate pressure (patent pending)
- New conical single stainless steel wire filter
- Enlarged water balancing chamber holes
- 5 high flow low pressure swivel ports
- Dual high pressure ports
- Available in yoke or DIN (not shown) configurations
S600 Second Stage
MK25SA/S600
This is the lightest weight 1st stage in our range of regulators and is the ideal 1st stage for traveling. Although the body and additional elements are made from a new light-weight marine-grade aluminum alloy which is virtually corrosion proof, the vital parts most often exposed to excess shock and strain are manufactured from solid stainless steel for optimal toughness. The performance is identical to the MK 25 AF. Body machined and yoke forged from a special aluminum alloy for minimum weight. Yolk screw, yolk retainer, swivel and seat adjustment parts are all in solid stainless steel to increase overall resistance. The special adapter located on one HP port, needed to attach the SPG, is made of stainless steel, eliminating any potential corrosion problem.
- 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, safegrip mouthpiece












