Abstract: A valve assembly may include a valve having an upper valve surface and a lower valve surface. The valve may be movable in a slot in a housing between an open position and a closed position, and the slot may have an upper slot surface and a lower slot surface. The valve assembly may include a biasing member movably positioned within the housing that may be configured to urge the valve toward one of the upper slot surface and the lower slot surface.

Abstract: The present embodiments provide systems and methods for valve insertion and linestopping. In one embodiment, the system comprises a sealing housing having a lower housing portion and an upper housing portion that are each dimensioned to partially surround an exterior surface of an existing pipe in an airtight state. In one embodiment, an integral valve assembly is disposed at least partially within an integral valve housing section of the upper housing portion. The integral valve assembly comprises a valve movable between an open position in which the valve provides an open pathway through an opening in the upper housing portion, and a closed position in which the valve provides a seal adjacent to the opening. The upper housing portion may be adapted to selectively receive each of an adapter plate for a cutting machine, a valve bonnet, and a blind flange.

Abstract: The present embodiments provide systems and methods for valve insertion and linestopping. In one embodiment, the system comprises a sealing housing having a lower housing portion and an upper housing portion that are each dimensioned to partially surround an exterior surface of an existing pipe in an airtight state. In one embodiment, an integral valve assembly is disposed at least partially within an integral valve housing section of the upper housing portion. The integral valve assembly comprises a valve movable between an open position in which the valve provides an open pathway through an opening in the upper housing portion, and a closed position in which the valve provides a seal adjacent to the opening. The upper housing portion may be adapted to selectively receive each of an adapter plate for a cutting machine, a valve bonnet, and a blind flange.

Abstract: The present embodiments provide systems and methods for valve insertion and linestopping. In one embodiment, the system comprises a sealing housing having a lower housing portion and an upper housing portion that are each dimensioned to partially surround an exterior surface of an existing pipe in an airtight state. In one embodiment, an integral valve assembly is disposed at least partially within an integral valve housing section of the upper housing portion. The integral valve assembly comprises a valve movable between an open position in which the valve provides an open pathway through an opening in the upper housing portion, and a closed position in which the valve provides a seal adjacent to the opening. The upper housing portion may be adapted to selectively receive each of an adapter plate for a cutting machine, a valve bonnet, and a blind flange.