Abstract: A process fluid regulator includes a regulator body having a fluid inlet and a fluid outlet connected by a fluid flow path. A control element is disposed within the fluid flow path, the control element cooperating with a seat to control fluid flow through the regulator body. An actuator is attached to the regulator body, the actuator providing force to move the control element relative to the seat. The actuator includes a housing and a diaphragm within the housing, the diaphragm dividing the actuator housing into an upper chamber and a lower chamber. A high pressure bleed valve is attached to the lower chamber to vent residual gas from the lower chamber, which creates additional volume for process liquid in the lower chamber. This additional volume improves effectiveness and response time of the process fluid regulator.

Abstract: A system, including a closed chamber (20) having a gas inlet (22) and a gas outlet (24) is shown and described. An inert gas supply under positive pressure is connected to the gas inlet, and a bubbler is connected to the gas outlet. The bubbler includes a compartment that is partially filled with liquid so as to define a head space, an inlet operatively connected to the gas outlet, a vent, and a vacuum line in fluid communication with the head space so that the head space has a negative pressure.

Abstract: A liquid filled pressure/vacuum valve for underground storage tanks has a body having an inlet coupled to the UST and an outlet coupled to atmosphere. The valve has a suction zone disposed in the body and fluidly coupled to the inlet. The valve has a pressure zone disposed in the body and fluidly coupled to the outlet, with the suction zone in fluid communication with the pressure zone. The valve has a separator disposed in fluid communication with the outlet and the pressure zone, and a fluid that flows between the suction zone and pressure zone. The flow of fluid is determined by an increased force due to a pressure differential between the suction zone and pressure zone.

Abstract: A reduced pressure treatment system includes a porous pad positioned at a tissue site and a canister having a collection chamber, an inlet, and an outlet. The inlet is fluidly connected to the porous pad. A reduced pressure source is fluidly connected to the outlet of the canister to such that fluid from the tissue site may be drawn into the collection chamber. A hydrophobic filter is positioned adjacent the outlet to prevent liquid from exiting the collection chamber through the outlet. A baffle is positioned within the canister to create a tortuous path between the inlet and the outlet to prevent premature blocking of the hydrophobic filter.

Abstract: Apparatus incorporating a water trap allows vent air to flow into a sewer system under low pressure differential conditions and allows gaseous emissions from the sewer system to exit the vent pipe only under greater differential pressure conditions.

Abstract: A valve apparatus includes a housing, which defines an interior chamber, a baffle disposed in the interior chamber, and a volume of liquid. The housing includes first, second and third portions. The first portion includes first and second ports that communicate with the interior chamber. The second portion is spaced from the first portion along a longitudinal axis. And the third portion extends along the longitudinal axis between the first and second portions. The baffle at least partially defines a helical fluid flow path between the first and second ports, and the volume of the liquid is disposed in the second portion of the housing.

Abstract: A valve apparatus includes a housing, which defines an interior chamber, a baffle disposed in the interior chamber, and a volume of liquid. The housing includes first, second and third portions. The first portion includes first and second ports that communicate with the interior chamber. The second portion is spaced from the first portion along a longitudinal axis. And the third portion extends along the longitudinal axis between the first and second portions. The baffle at least partially defines a helical fluid flow path between the first and second ports, and the volume of the liquid is disposed in the second portion of the housing.

Abstract: A housing and a method of using a liquid for controlling vapor flow through a valve apparatus between a canister and atmospheric conditions. The housing includes a container and a first partition that projects from the housing into the liquid and divides the vapor chamber into first and second vapor sub-chambers. A second partition projects from the container into the first vapor sub-chamber. And a third partition projects from the container into the second vapor sub-chamber. The housing contains the liquid in an upright arrangement of the valve apparatus, and prevents the liquid from flowing out of the container in a non-upright arrangement of the valve apparatus.

Abstract: An improved system for the non-destructive testing of the fluid tight integrity of an installed fluid transfer line such as a drain pipe or vent and wastewater system of a building. A removable test baffle is held in place between ends of adjacent sections of an installed fluid transfer line to isolate a portion of the line for testing. The test system comprises a baffle carriage, a removable test baffle, and a sleeve adapted to engage the outer surfaces of the adjacent sections to seal the junction and the test installation from leaking and optionally to provide one or more gaskets between the section ends and the baffle carriage. In optional preferred embodiments of the test system the baffle carriage is an integral part of the sleeve. Preferred baffles for use with the invention are flexible, of larger diameter than the fluid line, and comprise dual-gasket sealing means and means for removal of the baffles from either side of the test seal.

Abstract: A flexible, resilient anti-contamination baffle having a plurality of interleaved sheets of material. The sheets of material are secured at one end thereof to a surface adjacent an opening to be sealed and have the capability of not only substantially preventing the passage of gaseous contaminants through the opening when the regions adjacent the openings are of substantially the same pressures but also capable of allowing the rapid venting of gases from a region of higher pressure to a region of lower pressure. Additionally, the sheets of material are formed so as to provide a "breakaway capability" allowing the passing of an object through the opening without encompassing or entangling the object as it passes therethrough.

Abstract: A liquid seal valve, intended in particlar to form part of an inert gas system for supplying inert gas to a storage tank in which liquid fuel may be stored, comprises a first vessel having a gas outlet therefrom, and a gas inlet pipe extending downwardly into a second vessel containing a liquid trap, the lower end of the gas inlet pipe being disposed below the level of the surface of the liquid trap when there is no gas flow through the gas inlet pipe. The second vessel communicates, in a region above the level of the surface of the liquid trap, with the first vessel, whereby gas entering the valve via the gas inlet pipe can flow via the second vessel to the gas outlet in the first vessel. Pipe means provides communication between the lower end of the gas inlet pipe and at least two regions in the first vessel, of which at least one is below and at least one is above the level of the surface of the liquid trap when no gas flows through the gas inlet pipe.

Abstract: Excess steam pressure is relieved by displacement of a column of water through a vertical conduit opening a path for escape of steam through a space normally occupied by the water which normally acts as a seal. Under reversed conditions, air enters when the water is moved out of its sealing location by vacuum. The pressure vacuum breaker disclosed replaces flapper valves commonly used for pressure relief in paper making applications and has no moving mechanical parts.

Abstract: A hydraulic vent valve for use on ship cargo tanks is disclosed which is utilized to maintain a constant head of pressure or vacuum on containerized fluid and to provide leakproof isolation between the stored fluid and the atmosphere. The valve features a reservoir, a divider for dividing the reservoir into two chambers, an aperture in the divider through which liquid can flow, reservoir liquid in each of the chambers in an amount sufficient to cover the aperture when pressures inside of the chambers are equal, an intake connected to the reservoir for communicating pressures on the stored fluid to the surface of the reservoir liquid in one of the chambers and an exhaust for communicating atmospheric pressure to the surface of the liquid in the other chamber.