Abstract: A portable environmental testing system for environmental testing with particulate matter, such as sand and dust, is disclosed. The components of the system are largely contained within a modular container, such as an intermodal shipping container. The testing system uses a feeder to feed precise amounts of particulate matter into an injector, which injects the particulate matter into an airflow that leads to a nozzle assembly. The airflow itself is generated by a compressed air system. The material input station, for inputting particulate matter, includes operator protection features, like a negative draw fan. The system may be provided with wheels and a tow bar.

Abstract: Industrial vacuum systems are disclosed, as are filter chambers for industrial vacuum systems and other filtration applications. The filter chambers in these systems use two distinct types of filtering elements within a single chamber, arranging the filter elements such that air cannot pass through a secondary filter element until the air has first passed through and been filtered by a number of primary filter elements. The airflow within the filter chamber may be essentially vertical, and the secondary filter element may be positioned above the primary filter elements. The filter chamber may also include an agitation system for cleaning the filtering elements. The agitation system may be constructed such that it can operate while the system is in use.

Abstract: An environmental testing system for environmental testing with particulate matter, such as sand and dust, is disclosed. The testing system uses a feeder to feed precise amounts of particulate matter into an injector, which injects the particulate matter into the airflow leading to a test chamber with approximately the same velocity as the surrounding airflow. The feeder may be a loss-in-weight gravimetric feeder, and the injector may be a Venturi valve actuated by compressed air. The system also includes operator protection features, such as an exhaust fan that creates negative pressure when the door to the test chamber is opened, and when particulate matter is dumped into the system. A temperature control system heats and cools the airflow during tests, a pneumatic conveying system moves fluidized particulate matter into and out of the system, and a controller provides automatic control over the system.

Abstract: Industrial vacuum systems are disclosed, as are filter chambers for industrial vacuum systems and other filtration applications. The filter chambers in these systems use two distinct types of filtering elements within a single chamber, arranging the filter elements such that air cannot pass through a secondary filter element until the air has first passed through and been filtered by a number of primary filter elements. The airflow within the filter chamber may be essentially vertical, and the secondary filter element may be positioned above the primary filter elements. The filter chamber may also include an agitation system for cleaning the filtering elements. The agitation system may be constructed such that it can operate while the system is in use.

Abstract: An environmental testing system for environmental testing with particulate matter, such as sand and dust, is disclosed. The testing system uses a feeder to feed precise amounts of particulate matter into an injector, which injects the particulate matter into the airflow leading to a test chamber with approximately the same velocity as the surrounding airflow. The feeder may be a loss-in-weight gravimetric feeder, and the injector may be a Venturi valve actuated by compressed air. The system also includes operator protection features, such as an exhaust fan that creates negative pressure when the door to the test chamber is opened, and when particulate matter is dumped into the system. A temperature control system heats and cools the airflow during tests, a pneumatic conveying system moves fluidized particulate matter into and out of the system, and a controller provides automatic control over the system.

Abstract: A vacuum loader system is disclosed. In the vacuum loader system, the air inlet comprises a load-bearing member of a support structure that supports the system. The vacuum loader system also includes a filter chamber with co-located primary and secondary or safety filter elements. A safety filter element is at the center of the filter chamber, surrounded by primary filter elements. After the air flows through the primary and safety filter elements, it is directed downwardly, out of the filter chamber and back toward the blower, beyond which it is ultimately expelled through a silenced outlet. In some embodiments, the conduit that carries air from the filter chamber toward the blower may also be a member of the support structure.

Abstract: A range hood for a kitchen range or other similar appliance is disclosed. The range hood is adapted to be coupled to a blower to draw the contaminated effluent stream from the range into the hood. The effluent stream is drawn through a substantially horizontal perforated liquid support or impingement tray that is filled with a working liquid, and is then passed through a high-efficiency mist eliminator. The range hood offers a substantially straight airflow path from a point just inside the inlet to the outlet. The range hood also has a low profile, and offers direct access to its interior components for easy inspection and cleaning.

Abstract: An environmental testing system for environmental testing with particulate matter, such as sand and dust, is disclosed. The testing system uses a feeder to feed precise amounts of particulate matter into an injector, which injects the particulate matter into the airflow leading to a test chamber with approximately the same velocity as the surrounding airflow. The feeder may be a loss-in-weight gravimetric feeder, and the injector may be a Venturi valve actuated by compressed air. The system also includes operator protection features, such as an exhaust fan that creates negative pressure when the door to the test chamber is opened, and when particulate matter is dumped into the system. A temperature control system heats and cools the airflow during tests, a pneumatic conveying system moves fluidized particulate matter into and out of the system, and a controller provides automatic control over the system.

Abstract: A vacuum loader system is disclosed. In the vacuum loader system, the air inlet comprises a load-bearing member of a support structure that supports the system. The vacuum loader system also includes a filter chamber with co-located primary and secondary or safety filter elements. A safety filter element is at the center of the filter chamber, surrounded by primary filter elements. After the air flows through the primary and safety filter elements, it is directed downwardly, out of the filter chamber and back toward the blower, beyond which it is ultimately expelled through a silenced outlet. In some embodiments, the conduit that carries air from the filter chamber toward the blower may also be a member of the support structure.

Abstract: An environmental testing system for environmental testing with particulate matter, such as sand and dust, is disclosed. The testing system uses a feeder to feed precise amounts of particulate matter into an injector, which injects the particulate matter into the airflow leading to a test chamber with approximately the same velocity as the surrounding airflow. The feeder may be a loss-in-weight gravimetric feeder, and the injector may be a Venturi valve actuated by compressed air. The system also includes operator protection features, such as an exhaust fan that creates negative pressure when the door to the test chamber is opened, and when particulate matter is dumped into the system. A temperature control system heats and cools the airflow during tests, a pneumatic conveying system moves fluidized particulate matter into and out of the system, and a controller provides automatic control over the system.

Abstract: A range hood for a kitchen range or other similar appliance is disclosed. The range hood is adapted to be coupled to a blower to draw the contaminated effluent stream from the range into the hood. The effluent stream is drawn through a substantially horizontal perforated liquid support or impingement tray that is filled with a working liquid, and is then passed through a high-efficiency mist eliminator. The range hood offers a substantially straight airflow path from a point just inside the inlet to the outlet. The range hood also has a low profile, and offers direct access to its interior components for easy inspection and cleaning.

Abstract: A range hood for a kitchen range or other similar appliance is disclosed. The range hood is adapted to be coupled to a blower to draw the contaminated effluent stream from the range into the hood. The effluent stream is drawn through a substantially horizontal perforated liquid support or impingement tray that is filled with a working liquid, and is then passed through a high-efficiency mist eliminator. The range hood offers a substantially straight airflow path from a point just inside the inlet to the outlet. The range hood also has a low profile, and offers direct access to its interior components for easy inspection and cleaning.

Abstract: A range hood for a kitchen range or other similar appliance is disclosed. The range hood is adapted to be coupled to a blower to draw the contaminated effluent stream from the range into the hood. The effluent stream is drawn through a substantially horizontal perforated liquid support or impingement tray that is filled with a working liquid, and is then passed through a high-efficiency mist eliminator. The range hood offers a substantially straight airflow path from a point just inside the inlet to the outlet. The range hood also has a low profile, and offers direct access to its interior components for easy inspection and cleaning.