An input device for controlling buoyancy includes a means to control a second rate. The second rate of ascent may be selected by using the first input means 81, which may be a rate selection switch. Alternativly, you can select the second rate of ascent by bypassing the first rate. Depending on the circumstance, a buoyancy controller device could include several features. In one embodiment, the buoyancy control device comprises a buoyancy tank and a weight belt.
Weight belts
While the centre of buoyancy of a diver is largely out of the diver's control, the weight of the suit and the position of the cylinder are within the diver's power to adjust. In addition, weight belts and integrated BC weights can provide divers with additional control over their buoyancy. To provide neutral trim, these buoyancy control devices should always be worn above the hips and below the knees.
Dump valves
You can use a BCD to regulate your buoyancy in two different ways. Either you can completely deflate your air bladder or add air to refresh it. Dump valves attach to a string and control air levels. Most BCDs have one or two dump valves on each shoulder. To maintain comfortable buoyancy while diving, the dump valves allow you to inflate the air bladder.
Jacket-style buoyancy control device
Whether you're a new diver or have been diving for years, you may want to invest in a jacket-style buoyancy control device (BCD). BCDs are made to fit snugly over swimsuits, so they will not move around. Some models come with front weight pockets and rear trim pockets for easy access to your weights. The jacket-style BCD features a cushioned back, which makes it comfortable to wear and allows you adjust its buoyancy gauges easily.
Attachment systems in BC
A BC is a type scuba dive vest used by divers to maintain buoyancy and prevent sinking. A BC is designed to keep the diver and SCUBA tanks in place. Although BCDs are similar, the design and functions may differ from one model to another. It is crucial to learn how to properly use your BC and to have a backup plan in the event of a malfunction.
Pneumatic valves control depth adjustment
Pneumatic valves are at the heart and soul of industrial processes. They use a force balance principle to control fluid flow. Three ports make up a pneumatic valve: an air supply port, a control signal output and an exhaust. Above the device to be controlled, a lever arm is placed. It is equipped with an adjustable diaphragm which changes pressure when the position of an external sensor changes. When the sensor's pressure rises, the left end of the lever arm lifts and opens the supply air valve. The controlled device moves when the pressure is higher.