The FM1 Breather Bag is a 100% polyester needle felt breather designed specifically for breathing applications, such as venting hoppers and other contained vessels. Its primary function is to allow air to escape from sealed systems, maintaining internal pressure and product quality without allowing dust and particulates to escape.

By venting out air, the FM1 Breather Bag helps to stabilize the pressure inside contained systems such as silos and hoppers. This prevents issues related to overpressure and helps in maintaining the structural integrity and operational efficiency of the system. The breather's design ensures that product quality is not compromised by allowing the contained system to "breathe" without exposing the contents to external contaminants.

Made from polyester with a multi-filament scrim supported needle felt and superglazed on one side, the FM1 Breather Bag has a wall thickness of approximately 1.7mm. It is breathable, capable of operating at temperatures ranging from -20°C to 130°C, with a surge temperature up to 150°C. It features an air permeability rate of 17 cm3/cm2/sec at 125Pa, and is designed to handle environments with vibration and oscillation, although it is not suitable for compressive applications.

The FM1 Breather Bag complies with FDA 21 CFR 177.2800 for food safety, ensuring it is safe for use in food processing environments. While it is not Atex Certified, meaning it is not suitable for use in explosive atmospheres, the BFM® cuff and spigot system integrated with the breather is 3A certified as a sanitary fitting and also meets EU regulations (EC) 1935/2004 & 10/2011. These certifications make it appropriate for a wide range of industrial applications where sanitary conditions are required.