A device for preparing an insulation product based on wool, includes a chamber including an inlet opening through which a stream of carrier gas and a wool in the form of nodules or flakes are introduced, at least one system for generating a turbulent gas flow in the chamber, and an outlet opening through which flakes mixed with an outlet gas stream are expelled, wherein the device also includes at least one deflector element arranged in the chamber, creating a disruption that aerates the wool in the form of nodules or flakes.

Systems for shredding fibrous material are described. In some embodiments, the system includes a cart that includes a hopper that includes an auger motor for shredding fibrous material and a blower motor configured to blow the shredded fibrous material onto structures for fireproofing. The cart may include a handle, one or more wheels, and/or forklift apertures to aid in transport.

A drive rod in a solid material dispenser is linearly movable along, and rotationally movable around, an axis direction. A central rod is attached to the drive rod and drivable by the drive rod to rotate around the axis direction with the drive rod. A solid material container has one or more compartments to store solid materials to be dispensed. A switch valve is rigidly attached to the central rod and drivable by the central rod to rotate around the axis direction with the central rod. A container bottom of the solid material container comprises one or more first component shapes that form one or more first interstitial void spaces. The switch valve comprises one or more second component shapes that form one or more second interstitial void spaces.

A drive rod in a solid material dispenser is linearly movable along, and rotationally movable around, an axis direction. A central rod is attached to the drive rod and drivable by the drive rod to rotate around the axis direction with the drive rod. A solid material container has one or more compartments to store solid materials to be dispensed. A switch valve is rigidly attached to the central rod and drivable by the central rod to rotate around the axis direction with the central rod. A container bottom of the solid material container comprises one or more first component shapes that form one or more first interstitial void spaces. The switch valve comprises one or more second component shapes that form one or more second interstitial void spaces.