
An input means is included in a buoyancy control device that allows for a second rate ascent. You can select the second rate of ascent by using the first input device 81. This could be a rate selection switch. You can also select the second rate by selecting the first rate. A buoyancy control device can include a variety of features depending on the situation. One embodiment of a buoyancy control device includes a buoyancy tank as well as a weight belt.
Weight belts
The centre buoyancy of divers is out of their control. However, they can adjust the suit's weight and the position of their cylinder. Additionally, divers may have the option to use weight belts or integrate BC weights to increase their control over their buoyancy. To maintain a neutral trim, the buoyancy control device should be worn at your waist, above your hips and below you knees.

Dump valves
The BCD offers two options to regulate your buoyancy. Either blow out the air bladder completely, or add air. Dump valves are generally attached to a string and help to control air levels. Most BCDs have one or two dump valves on each shoulder. When diving, you can use the dump valves to deflate the air bladder to maintain a comfortable buoyancy.
Jacket-style buoyancy control device
You can invest in a jacket-style BCD, whether you're new to diving or have been diving since years. Many BCDs can be worn over a swimsuit so that the weight stays in place. Some models include front weight pockets and rear trim pockets that allow 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 for BC
A BC is a type dive vest that scuba divers wear to keep their buoyancy high and prevent them from sinking. The BC holds the diver and SCUBA tank in place. BCDs have similar functions, but they may vary in their design. It is important to know how to use your BC properly and make a backup plan in case of malfunction.

Pneumatic valves control depth adjustment
Pneumatics valves are essential for most industrial processes. They regulate fluid flow using a force-balance principle. A pneumatic valve can have three ports: air supply, control signal output, exhaust. The control device is controlled by a lever arm. 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 is activated when there's more pressure.