An FA Valve (Humidifier) is a medical device used in oxygen therapy to deliver moisturized oxygen to patients. “FA” typically stands for Flowmeter with Attached Humidifier, and it is designed to regulate the flow of oxygen from a source like an oxygen cylinder or concentrator while also adding moisture to the gas. This is important because medical-grade oxygen is very dry, and when inhaled directly, it can dry out the nasal passages and respiratory tract, causing discomfort or irritation. The humidifier part of the device usually contains sterile water, and as the oxygen passes through it, moisture is added before the gas is delivered to the patient.
The FA valve also includes a flowmeter, which allows healthcare providers to control the rate at which oxygen is delivered, usually measured in liters per minute (LPM).
