Valve Types

Your tank valve should operate easily and smoothly. If there is any difficulty in operation, don't try to lubricate it. Have a professional dive operation service it. Closing a valve too tightly can damage its high-pressure seal. When setting up your equipment, open the valve slowly, all the way until it stops turning.(Note: It used to be common to open the valve all the way, and then close it a quarter to half a turn. This isn't necessary with modern valves, though it doesn't hurt anything if someone does it.) When you're taking it apart,close it all the way gently. Always close valves gently and avoid over-tightening.

In recreational diving, scuba tanks should only be filled with compressed air for breathing never pure oxygen. During filling, your dive operation will usually cool your cylinder in water (it heats as the pressure rises). Tanks should only b. filled to the rated pressure, since overfilling can lead to metal fatigue and shorten the life of the tank.

Your dive operation fills your tank with totally dry air because moisture inside can cause rust or corrosion on its inner surface. It is also important to keep water out of your tank. The best way to do this is to never allow it to completely empty. If you do empty the tank completely, close the valve immediately to keep moisture out. Water can even enter an empty tank by backing up through a regulator, so having the regulator attached doesn't guarantee a dry interior.

Also, bleeding the air from your tank quickly can cause internal condensation and corrosion.In recreational diving, scuba tanks should only be filled with compressed air for breathing - never pure oxygen. During filling, your dive operation will usually cool your cylinder in water (it heats as the pressure rises). Tanks should only b. filled to the rated pressure, since overfilling can lead to metal fatigue and shorten the life of the tank.

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Dive Equipment Equipment Identification Fins Give Preview Introduction Padi Open Water Pressure and Your Body Regulators Scuba Systems

Scuba Tanks SnorkelsSubmersible Pressure Succed Course The Effects of Increased Air Density The Effects Pressure The Underwater World The Buddy System Valve Types