|
|
Valve Type |
DEMAND |
Adjustment |
VENTURI SWITCH |
Balancing System |
N/A |
Integrated Purge Button |
YES |
Mouthpiece |
ORTHODONTIC |
Nitrox Compatibility |
STANDARD TO 40% |
Ambidextrous |
NO |
Integrated Swivel |
NO |
Weight (without hose) |
7 OUNCES |
Dimensions (front profile) |
2.67 INCHES |
First Stage Configuration |
ATMOS |
Minimum Cracking Effort |
1.1 CIW* |
Factory Set Inhalation Effort |
1.2 - 1.4 CIW* |
|
.96 JOULES |
Warranty |
2 YEAR |
FEATURES & FUNCTIONS |
AT 400 FIRST STAGE |
Valve Type |
BALANCED DIAPHRAGM |
Primary Material |
MARINE BRASS |
Low Pressure Ports |
4 |
High Pressure Ports |
2 |
Integrated Swivel |
NO |
Nitrox Compatibility |
STANDARD TO 40% |
300 BAR DIN Fitting |
OPTIONAL |
Sealed Valve Design |
YES |
Environmental Protection |
YES |
Weight |
29 OUNCES |
Factory Set Intermediate Pressure |
138-143 PSI |
DVT (Dry Valve Technology) |
YES |
Warranty |
2 YEAR / LIFETIME PARTS |
WORK OF BREATHING
Did you know that it costs energy to breathe? The amount of energy your regulator requires to move each liter of air is called work of breathing (WOB). Lower work of breathing equals lower effort required to breathe and increased comfort and safety during a dive.
How to Read Work of Breathing Charts
The computer-generated breathing machine chart presented above represents a regulator's performance per standards established by the U.S. Navy's Experimental Diving Unit. Tests are conducted at 198 feet with approximately 3000-psi supply pressure, 25 breaths per minute of 2.5 liters each.
(1) Inhalation - The chart shows one complete breath cycle, starting with inhalation on the left and continuing along the bottom to the right, staying mostly below 0.0; thus the inhalation work of breathing is reported in negative numbers.
(2) Exhalation - The exhalation effort begins on the right and runs across the top to the left. These are all positive numbers since a diver (or the machine in this case) is blowing out (exhaling) rather than inhaling.
(3) WOB - The total area inside the loop formed by the two lines is what the computer analyzes to calculate the regulator's total work of breathing - the amount of energy the regulator requires to move each liter of air.
*Column Inches of Water |
