A safety valve is a device, usually in the shape of an open end, that is used to close off the air supply in emergency situations. These are particularly useful when you have an oil tank or other large holding that is pressurized and prone to sudden pressures. These devices are generally controlled by a person seated at the controls, although they can sometimes be controlled automatically with a remote device.
Safety valves are particularly useful in situations where there is sudden loss of pressure in the system. They allow for the quick restoration of pressure to normal levels without the need to open the cylinder. For example, if the boiler at your home suddenly goes out, you can set off a safety valve that will quickly restore the levels of pressure in the system so that the water and heating systems do not suffer. Similarly, you can use a safety valve if you discover that the air conditioning system in your car is not working properly. This will automatically switch off the system and bring it back to a safe level. In both instances, you will be able to resume your standard breathing pattern until the emergency relief has been restored.
A safety valve is especially useful when you are dealing with very low pressure conditions, as it allows for the continued circulation of air even when there is a drop in pressure. However, you should always make sure that the valve is opened and closed at the proper time. If there is any delay in switching off the valve, the pressure will drop below the required safety level and the valve will not open, resulting in an extremely dangerous situation. Similarly, if the system fails to return to a normal state after you have switched off the valve, you may well experience a serious injury.