Two-Way Non-Rebreathing Valves have three ports identified as Inhalation, Exhalation and Mouth port. The Inhalation and Exhalation ports have one-way Spiral-Type™ Diaphragms to control the direction of air flow through the valve. A spontaneous breathing patient connected to the Mouth port will breathe in through the Inhalation port and breathe out through the Exhalation port as controlled by the placement of the
one-way diaphragms. The Spiral-Type™ diaphragms are designed specifically for low pressure respiratory breathing circuits