Can I use this tank with both air and nitrox, for example today I use air and tomorrow nitrox, and so on. Or if I start using it with air it will stop being nitrox compatible? I know that nitrox compatible tanks have a sticker or a mark on them that tells a diver they are for nitrox, but can they also be used with air, and If so then why not all tanks are nitrox ready?
When using Nitrox you can still use it for Air. But it must be trippel cleaned air.
There are a number of viewpoints. In industrial situations any hyperoxic gas mix may be treated as pure oxygen, others suggest that 23.5% oxygen is the limit. For scuba purposes it is generally recommended that any mix with greater than 50% oxygen is treated as pure oxygen and that any equipment which may be exposed to a mixture with greater than 40% oxygen be oxygen compatible and made oxygen clean prior to use.
When considering which pieces of equipment may be exposed to high percentages of oxygen remember that pure oxygen may be pumped into your cylinder during nitrox fills. Thus cylinders, pillar valves and hoses used for gas transfer should all be prepared for oxygen service.
Regulators and ancillary equipment which may come into contact with the mixture from the cylinder should be prepared to work with the percentage of oxygen in the final mix. For mixes with less than 40% oxygen it is not regarded as essential to have this equipment made oxygen clean, however, it is up to you. It won't hurt to have it done, after all isn't everything
we do in preparing for a dive about being safe rather than sorry.Use the tank
for one or the other or have it cleaned,before going back to nitrox.
Equipment intended for Nitrox use must be specially cleaned before being placed into service in order to prevent fire or explosion caused by the higher oxygen content in Nitrox. Nitrox with its higher oxygen content can explode when it comes into contact with oils or other contaminates under pressure. Once the equipment is specially cleaned it is marked for Nitrox use. If you then use the Nitrox ready equipment with standard air mix later, it must be specially cleaned again before being used again for Nitrox use. Because of this, most people dedicate their Nitrox equipment for "Nitrox Use Only" once properly cleaned and marked. Best practice is to not switch back and forth. Doing so puts you and others at serious risk.
You can either use it for air OR nitrox. Once it is O2 cleaned, you can't use it for air and then back to nitrox. They come cleaned for nitrox, and I would think that most tanks are nitrox ready. The issue is the corrosion that the additional o2 can lead to. This tank is nitrox ready! I have a couple of these, and there are no issues. After the initial inspection, (VIP) you can have it filled nitrox and throw a sticker on it to designate it as such. You can't mix reg air and nitrox mainly due to safety issues, and o2 corrosion. Bottom times and surface intervals are much diff for each mixture. Hope this helps!
Because of the purity of the oxygen required in a nitrox mix you really can't go back and forth without a lot of hassle. From what I understand it's one or the other for a given tank. Hope this helps. Check your enriched air course book. I'm sure it explains it in there.