Abstract: Powder and deposition control in a throttle valve includes nozzle inserts in the valve body that form annular plenums and annular nozzles for injecting annular flows of cleaning gas adjacent to the inside wall surface of the valve body for cleaning powders and depositions off surfaces in the valve body and off the closure member of the throttle valve. The annular flows of cleaning gas can be in intermittent, periodic, or in pulsed bursts or at a steady-state flow rates to dislodge powder particles stuck to the inside surface of the throttle valve, to etch or reactively clean solid deposits, or to prevent or minimize build-up of powder particles or solid deposits in the throttle valve.

Abstract: Powder and deposition control in a throttle valve includes nozzle inserts in the valve body that form annular plenums and annular nozzles for injecting annular flows of cleaning gas adjacent to the inside wall surface of the valve body for cleaning powders and depositions off surfaces in the valve body and off the closure member of the throttle valve. The annular flows of cleaning gas can be in intermittent, periodic, or in pulsed bursts or at a steady-state flow rates to dislodge powder particles stuck to the inside surface of the throttle valve, to etch or reactively clean solid deposits, or to prevent or minimize build-up of powder particles or solid deposits in the throttle valve.

Abstract: A hot trap for removing a reactive constituent gas from a gas stream via chemical reaction and/or thermal disassociation includes a trap chamber with a heater assembly and a trap medium in its core inner portion and annular pre-heating and counterflow heating ducts in its outer and intermediate portions surrounding the core inner portion for heating an inflowing gas stream and conservation of heat energy in the trap as well as to maintain lower temperatures on external surfaces.

Abstract: A hot trap for removing a reactive constituent gas from a gas stream via chemical reaction and/or thermal disassociation includes a trap chamber with a heater assembly and a trap medium in its core inner portion and annular pre-heating and counterflow heating ducts in its outer and intermediate portions surrounding the core inner portion for heating an inflowing gas stream and conservation of heat energy in the trap as well as to maintain lower temperatures on external surfaces.

Abstract: An isolation valve includes a shield that surrounds and protects the valve closure actuator components from exposure to corrosive fluids that flow through the valve when the valve is open.

Abstract: An isolation valve includes a shield that surrounds and protects the valve closure actuator components from exposure to corrosive fluids that flow through the valve when the valve is open.