1. The air flow is only allowed to flow in one direction but not in the opposite direction;2. Used to prevent backflow caused by a drop in air source pressure or a drop in pressure caused by an increase in air consumption;3. Large effective circulation area;4. The internal valve core is made of POM injection molding, and the valve port is sealed by rubber, with a simple and compact structure. Category: One-way valve, Brand: Airtac, Series: NRV