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5.3 First and second stage features
The following tables summarize the specific features of SCUBAPRO first and second stages.
First stage
Technology
Piston
Air-balanced-flow-through
Classic downstream
Balanced diaphragm
Materials
Chrome
plated brass body
Full titanium body
Cold water
Anti-freeze protection (AF)
Dry chamber
XTIS antifreeze system
Nitrox compatible up to 100% oxygen concentration
Ports
Intermediate pressure Ports (IP)
High Flow Ports (HFP)
High Pressure (HP) Ports
Swivelling turret with IP Ports
Configuration
INT 230 bar (3336 psi)
DIN 300 bar (4351 psi)
Dedicated Nitrox EN144-3
200 bar (2900 psi)
Externally adjustable intermediate pressure
Weight DIN 300 (g/oz)
Weight INT (g/oz)
Weight EN 144-3 200 bar (g/oz)
Air Flow at 200 bar (l/min / SCFM)
Intermediate pressure 230 bar/3336 psi (bar/psi)
10
MK25
MK25 EVO MK2 EVO MK19 EVO MK17 EVO
EVO T
•
•
•
•
•
•
•
•
•
•
•
4
5
5
-
5
5
2
2
1
•
•
•
•
•
•
•
•
•
•
350/12.3
570/20.1
450/15.9
475/16.7
790/27.9
670/23.6
>8500 / 301 >8500 / 301 3000 / 106 >6900 / 244 >6900 / 244 >5500 / 195 >8500 / 301 3000 / 106
9.2-9.8 /
9.2-9.8 /
9.5 - 10 /
133-142
133-142
138-145
MK11
•
•
•
•
•
•
•
•
•
•
4
4
5
4
5
2
2
2
2
•
•
•
•
•
•
•
•
665/23.5
640/22.6
490/17.3
885/31.2
860/30.3
710/25
9.2-9.8 /
9.2-9.8 /
9.2-9.8 /
133-142
133-142
133-142
MK25 EVO
MK2 EVO
NITROX
NITROX
•
•
•
•
•
•
•
•
•
4
5
-
5
2
1
•
•
•
•
-
-
-
-
612 / 21.6 490 / 17.3
9.2-9.8 /
9.5 - 10 /
133-142
138-145
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