Abstract: A blind assembly for use in a piping circuit that includes a blind element and an injection system. The blind element has a planar portion that is transversely mounted in the piping circuit to block flow through the piping circuit. When the blind element is installed, it has one or more flat surfaces that are in sealing contact with another component of the piping circuit, such as a flange face, to define a sealing interface. A primary seal is provided between the blind element and the other component of the piping circuit and which circumscribes at least a portion of the sealing interface. The injection system is in communication with the sealing interface, and selectively injects a sealant material into the sealing interface to form a redundant seal in the sealing interface and around the primary seal. An injection fitting can mount to the flange for injecting the sealant.

Abstract: A valve assembly includes a valve body with a central passage, an upstream end for receiving a fluid, and a downstream end for discharging the fluid. A segment ball valve rotates between a valve open position to allow the fluid to flow through the central passage, and a valve closed position to prevent the fluid from flowing through the central passage. A check valve located within the central passage downstream from the segment ball valve is biased to prevent the fluid from traveling upstream through the central passage, and to allow the fluid to travel downstream past the check valve. A locking mechanism secures the check valve in a locked position to prevent the fluid from flowing past the check valve. A sealable cavity is located between the segment ball valve and the check valve, to contain a neutral media to achieve a double block and bleed feature.

Abstract: A blind assembly for use in a piping circuit that includes a blind element and an injection system. The blind element has a planar portion that is transversely mounted in the piping circuit to block flow through the piping circuit. When the blind element is installed, it has one or more flat surfaces that are in sealing contact with another component of the piping circuit, such as a flange face, to define a sealing interface. A primary seal is provided between the blind element and the other component of the piping circuit and which circumscribes at least a portion of the sealing interface. The injection system is in communication with the sealing interface, and selectively injects a sealant material into the sealing interface to form a redundant seal in the sealing interface and around the primary seal. An injection fitting can mount to the flange for injecting the sealant.

Abstract: A valve assembly includes a valve body with a central passage, an upstream end for receiving a fluid, and a downstream end for discharging the fluid. A segment ball valve rotates between a valve open position to allow the fluid to flow through the central passage, and a valve closed position to prevent the fluid from flowing through the central passage. A check valve located within the central passage downstream from the segment ball valve is biased to prevent the fluid from traveling upstream through the central passage, and to allow the fluid to travel downstream past the check valve. A locking mechanism secures the check valve in a locked position to prevent the fluid from flowing past the check valve. A sealable cavity is located between the segment ball valve and the check valve, to contain a neutral media to achieve a double block and bleed feature.

Abstract: A valve apparatus including a check valve and a ball segment valve is provided within a fluid system for handling a flammable working fluid. The valve apparatus is arranged such that flapper doors of the cheek valve longitudinally overlaps a ball segment of the ball segment valve when each are in respective open positions such that the valve apparatus maintains a face-to-face dimension of a standard ball valve. The valve apparatus can thus provide positive isolation and directional fluid control in a congested fluid system with space savings over single valves. An isolated chamber is defined between the flapper doors and the ball segment when each is in a respective closed position. A non-flammable fluid is injected into the isolated chamber to urge the flapper doors and ball segment toward the closed positions to thereby provide a safe environment for performing maintenance operations on downstream fluid components.

Abstract: A valve apparatus including a check valve and a ball segment valve is provided within a fluid system for handling a flammable working fluid. The valve apparatus is arranged such that flapper doors of the check valve longitudinally overlaps a ball segment of the ball segment valve when each are in respective open positions such that the valve apparatus maintains a face-to-face dimension of a standard ball valve. The valve apparatus can thus provide positive isolation and directional fluid control in a congested fluid system with space savings over single valves. An isolated chamber is defined between the flapper doors and the ball segment when each is in a respective closed position. A non-flammable fluid is injected into the isolated chamber to urge the flapper doors and ball segment toward the closed positions to thereby provide a safe environment for performing maintenance operations on downstream fluid components.