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A scuba cylinder valve or pillar valve is a high pressure manually operated screw-down shut off valve fitted to the neck of a scuba cylinder to control breathing gas flow to and from the pressure vessel and to provide a connection with the scuba regulator or filling whip. [1]
Freezing of a first stage regulator, locking the valve mechanism open, and consequent free flow of the demand valve due to excessive interstage pressure. O-ring failure at the connection of a regulator to a cylinder valve. Appropriate maintenance and servicing of equipment. [5]
Freezing of water in contact with the first stage can lock it open, initiating a free-flow which will further cool the regulator. The only way this can be stopped is to close the supply valve from the cylinder. Then the diver must switch to an alternate regulator that receives its gas supply from a different cylinder valve.
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A kayak is a low-to-the-water, canoe-like boat in which the paddler sits facing forward, legs in front, using a double-bladed paddle to pull front-to-back on one side and then the other in rotation. [1] Most kayaks have closed decks, although sit-on-top and inflatable kayaks are growing in popularity as well. [2]
Hurley Lock – lock and weir on the River Thames in England, situated in a clump of wooded islands close to the village of Hurley, Berkshire. Boulter's Lock – lock and weir on the Thames River in England. A canoe/kayak flume is installed annually on the weir during the summer and there is a permanent fixed ramp in front of the third of the ...
On a kayak, the spraydeck is secured to a rim surrounding the cockpit with a line or elastic string called a rand. [1] The line or string often runs inside the hem along the edge of the spraydeck. Alternatively elastic cord is attached directly to the edge of the spraydeck, and is tightened around the rim of the kayak's cockpit or stretched ...
A positive locking device is a device used in conjunction with a fastener in order to positively lock the fastener. This means that the fastener cannot work loose from vibrations. The following is a list of positive locking devices: [1] A split beam nut; A castellated nut and a split pin; A hex nut or cap screw and a tab washer