FIELD: packing industry.
SUBSTANCE: flow controller is designed for the interaction with the casing to discharge the fluid product through the outlet opening and take-in the fluid substance (air) from the environment to the inside through the ventilation channel. The controller comprises a fixed attaching section which is extended around the discharge zone and a deflectable sealing flange which is extended laterally from and around the attaching section, forms the sealing surface and can shift elastically for the purpose of a sealing contact with part of the casing to prevent intake through the casing ventilation channel. The controller comprises a flexible, pressure-actuated, self-sealing valve of a slit type which is connected to the fixed attaching section and mounted across the discharge zone of the fixed attaching section. The valve is closed in the initial position to prevent the fluid product discharge and can open responding to the pressure difference to discharge the fluid product through the valve while the sealing flange can shift to the inner casing space by the pressure differential.
EFFECT: improved control over the product discharge.
7 cl, 14 dwg
