[et_pb_section fb_built=”1″ _builder_version=”4.27.9″ _module_preset=”default” background_image=”https:\/\/punkfish-academy.com\/wp-content\/uploads\/2026\/10\/o2-systems-title.png” global_colors_info=”{}”][et_pb_row _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.9″ _module_preset=”default” text_font=”Finger Paint|700|||||||” header_font=”|700|||||||” header_font_size=”47px” header_letter_spacing=”2px” custom_padding=”3px|||||” global_colors_info=”{}”]<\/p>\n
[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_row _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.9″ _module_preset=”_initial” global_colors_info=”{}”]<\/p>\n
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There are different oxygen systems, and they deliver very different amounts of oxygen. For us, only one goal matters: the highest possible concentration.<\/strong> Here are the systems you’ll find most often at dive centers and in emergency kits.<\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.27.9″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.9″ _module_preset=”default” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”1_2,1_2″ _builder_version=”4.27.9″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”1_2″ _builder_version=”4.27.9″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.9″ _module_preset=”default” global_colors_info=”{}”]<\/p>\n Oxygen flows continuously, and ambient air mixes in with every breath. That’s great for someone who just needs a bit more oxygen\u2014but not enough for us: often only around 35% oxygen actually reaches the person. Not the mask of first choice.<\/p>\n [\/et_pb_text][\/et_pb_column][et_pb_column type=”1_2″ _builder_version=”4.27.9″ _module_preset=”default” global_colors_info=”{}”][et_pb_image src=”https:\/\/punkfish-academy.com\/wp-content\/uploads\/2026\/10\/o2-mask.png” title_text=”o2-mask” _builder_version=”4.27.9″ _module_preset=”default” global_colors_info=”{}”][\/et_pb_image][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.27.9″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.9″ _module_preset=”default” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”1_2,1_2″ _builder_version=”4.27.9″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”1_2″ _builder_version=”4.27.9″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.9″ _module_preset=”default” global_colors_info=”{}”]<\/p>\n A small bag fills with oxygen; you breathe in from the bag and exhale through a valve. This achieves concentrations of around 90%. Many dive centers carry these masks in their kits.<\/p>\n [\/et_pb_text][\/et_pb_column][et_pb_column type=”1_2″ _builder_version=”4.27.9″ _module_preset=”default” global_colors_info=”{}”][et_pb_image src=”https:\/\/punkfish-academy.com\/wp-content\/uploads\/2026\/10\/o2-reservoir.png” title_text=”o2-reservoir” _builder_version=”4.27.9″ _module_preset=”default” global_colors_info=”{}”][\/et_pb_image][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.27.9″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.9″ _module_preset=”default” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”1_2,1_2″ _builder_version=”4.27.9″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”1_2″ _builder_version=”4.27.9″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.9″ _module_preset=”default” global_colors_info=”{}”]<\/p>\n A demand valve works like a dive regulator: oxygen only flows when you inhale, and exhaled air escapes outward. This means the person breathes almost pure oxygen, and only as much is used as they actually breathe.<\/p>\n [\/et_pb_text][\/et_pb_column][et_pb_column type=”1_2″ _builder_version=”4.27.9″ _module_preset=”default” global_colors_info=”{}”][et_pb_image src=”https:\/\/punkfish-academy.com\/wp-content\/uploads\/2026\/10\/o2-demand-1.png” title_text=”o2-demand” _builder_version=”4.27.9″ _module_preset=”default” global_colors_info=”{}”][\/et_pb_image][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.27.9″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.9″ _module_preset=”default” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”1_2,1_2″ _builder_version=”4.27.9″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”1_2″ _builder_version=”4.27.9″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.9″ _module_preset=”default” global_colors_info=”{}”]<\/p>\n A kind of rebreather for oxygen: you exhale into a breathing bag, soda lime filters out the CO\u2082, and only as much oxygen is added as the body consumes.<\/p>\n [\/et_pb_text][\/et_pb_column][et_pb_column type=”1_2″ _builder_version=”4.27.9″ _module_preset=”default” global_colors_info=”{}”][et_pb_image src=”https:\/\/punkfish-academy.com\/wp-content\/uploads\/2026\/10\/o2-wenoll.png” title_text=”o2-wenoll” _builder_version=”4.27.9″ _module_preset=”default” global_colors_info=”{}”][\/et_pb_image][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.27.9″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.9″ _module_preset=”default” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][et_pb_text _builder_version=”4.27.9″ _module_preset=”default” global_colors_info=”{}”]<\/p>\n Every rebreather works on the same basic principle as a Wenoll system: CO\u2082 is filtered out, oxygen is added. If you feed in only oxygen, it delivers practically unlimited, nearly pure oxygen (you never quite reach 100%). The requirement: you need to know how to operate the device. That’s not a reason to buy a rebreather for first aid\u2014but it’s a nice bonus argument.<\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.27.9″ _module_preset=”default”][et_pb_column _builder_version=”4.27.9″ _module_preset=”default” type=”4_4″][et_pb_text _builder_version=”4.27.9″ _module_preset=”4183fb6d-c74e-4861-9493-5fb6a9ce011c” hover_enabled=”0″ global_colors_info=”{}” sticky_enabled=”0″]<\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.27.9″ _module_preset=”default” hover_enabled=”0″ global_colors_info=”{}” sticky_enabled=”0″][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.9″ _module_preset=”default” hover_enabled=”0″ global_colors_info=”{}” sticky_enabled=”0″]<\/p>\n An oxygen kit only helps if its contents match up and are ready to use. So take a calm look through your kit: What connections are there? Which mask goes where? Is the regulator already fitted? Do you need a key to open it\u2014and is it in the kit?<\/span><\/p>\n The exact setup depends on your equipment. The basic process is similar for many systems.<\/span><\/p>\n Secure the cylinder so it can\u2019t tip over or roll away. Keep cigarettes, open flames, oil, and grease away. Oxygen doesn\u2019t burn itself, but it can greatly intensify a fire.<\/span><\/p>\n Work with clean hands and clean connections. Don\u2019t use lubricants or improvised adapters.<\/span><\/p>\n The regulator reduces the high cylinder pressure to the system\u2019s working pressure. If it isn\u2019t fitted yet, first check that the connection and the required seal match and are undamaged.<\/span><\/p>\n Fit it according to the manufacturer\u2019s instructions. Some connections are tightened by hand; others require a specific tool. You can\u2019t force a wrong connection to fit.<\/span><\/p>\n If the regulator is already fitted, you don\u2019t need to remove it again for every use.<\/span><\/p>\n On a multifunction regulator, different outlets may be available:<\/span><\/p>\n Constant Flow:<\/span><\/strong> This is where the thin oxygen hose for a reservoir-bag mask is connected. You set the amount on the flow regulator.<\/span><\/p>\n Demand:<\/span><\/strong> The demand valve is supplied via the designated pressure hose and connection. It delivers oxygen when you inhale. The liters-per-minute setting on the Constant Flow outlet does not control this connection.<\/span><\/p>\n This is a good moment to look into your kit: Can you reliably tell the two connections apart?<\/span><\/p>\n Open the cylinder valve slowly according to the equipment instructions. Check the cylinder pressure and listen for unusual hissing or other signs of leaks.<\/span><\/p>\n A pressurized connection is not loosened. If something isn\u2019t sealed, close the cylinder and depressurize the system as instructed before checking the connection.<\/span><\/p>\n Connect the hose to the Constant Flow outlet and to the mask. For the non-rebreather mask described here, we start at 15 liters per minute; also follow the specifications for your model.<\/span><\/p>\n Let the reservoir bag fill before putting the mask on. Briefly explain to the person what you\u2019re doing and ask for their consent. Fit the mask so it seals well around the mouth and nose.<\/span><\/p>\n Watch the bag while they breathe: it must not collapse completely on inhalation. If it does, check flow, cylinder pressure, and the hose for faults or kinks. Depending on breathing demand and equipment, the flow may need to be increased.<\/span><\/p>\n A mask on the face is not proof that enough oxygen is actually getting through.<\/span><\/p>\n Connect the demand valve, pressure hose, and the appropriate mask according to the equipment instructions. Check function in the way specified for your model.<\/span><\/p>\n The person must be able to trigger the valve with their own inhalation. Make sure the mask fits well and that they can breathe through it comfortably.<\/span><\/p>\n1. Constant Flow with Simple Mask<\/h3>\n
2. Constant Flow with Reservoir Bag<\/h3>\n
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3. Demand Valve<\/h3>\n
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4. Wenoll System<\/h3>\n
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5. Closed-Circuit Rebreather (CCR)<\/h3>\n
From kit to oxygen administration<\/span><\/h2>\n
1. Create a safe setup<\/span><\/h3>\n
2. Connect the cylinder and regulator<\/span><\/h3>\n
3. Use the correct outlet<\/span><\/h3>\n
4. Open slowly and check<\/span><\/h3>\n
5. Prepare the reservoir mask<\/span><\/h3>\n
6. Prepare the demand valve<\/span><\/h3>\n