Abstract: An automatic airflow balancing valve, including: a housing having an inlet and an outlet and defining a flow path therethrough; a valve disc operatively connected to the housing and disposed within the flow path; and an airflow volume calibrating assembly disposed in the flow path and operatively connected to the valve disc and the housing to pivot the valve disc to a home position associated with a desired constant airflow volume. The airflow volume calibrating assembly may include an adjustment element that extends toward at least one of the inlet or the outlet.

Abstract: A mechanical closure device comprises an enclosure having four sides, a top and bottom and defining a discharge opening at the bottom. A floodgate assembly is interiorly removably mounted to the enclosure and comprises a pair of doors pivoted on a hinge assembly between an opened position and closed position. In the closed position, the doors seal against the flange to prevent passage of water through the discharge opening. A discharge drain assembly is preferably disposed on one door and has an opened and a closed position. An appendage is provided to facilitate opening and of the door. Upon removal, the floodgate assembly is stably positionable on a multipositionable service rack. A multipurpose tool is employed unlatching the floodgate doors and slidably removing the floodgate assembly.

Abstract: A mechanical closure device comprises an enclosure having four sides, a top and bottom and defining a discharge opening at the bottom. A floodgate assembly is interiorly removably mounted to the enclosure and comprises a pair of doors pivoted on a hinge assembly between an opened position and closed position. In the closed position, the doors seal against the flange to prevent passage of water through the discharge opening. A discharge drain assembly is preferably disposed on one door and has an opened and a closed position. An appendage is provided to facilitate opening and of the door. Upon removal, the floodgate assembly is stably positionable on a multipositionable service rack. A multipurpose tool is employed unlatching the floodgate doors and slidably removing the floodgate assembly.

Abstract: A recycling system includes a plurality of tracking devices, a conveying system, a scanning system and a monitoring system. Each of the tracking devices may be associated with at least one of a plurality of tracking codes. Each of the tracking codes is associated with at least one of a plurality of waste generating entities. The recycling system can scan the tracking devices of the waste portions as they are directed by and through the conveying system. The monitoring system receives information about the content of each of the waste portions and associates the content information with the tracking codes. Advantageously, the recycling system can then track compliance of the waste generating entities in a recycling disposal program.