Abstract: A pressure reducing valve including a balanced valve cartridge. The balanced valve cartridge has a retainer including a central bore. A valve seat and a valve plug are disposed within the central bore and cooperate to open and close the valve. A cap closes one end of the central bore, the cap including a blind bore for receiving a portion of the valve plug. Downstream fluid pressure is transmitted into the blind bore through a hollow portion of the valve plug, thus balancing the valve plug within the retainer.

Abstract: A valving arrangement for a mobile gas supply system includes a primary inlet port, a primary outlet port, a regulator, a secondary inlet port, and a secondary outlet port. The primary inlet port is adapted to be connected to a gas cylinder. The primary outlet port is in fluid communication with the primary inlet port and is adapted to be connected to one or more accessories for delivering gas from the gas cylinder. The regulator is disposed between the primary inlet port and the primary outlet port for reducing the pressure of the gas delivered by the gas cylinder to the primary inlet port. The secondary inlet port is in fluid communication with the primary outlet port. The secondary outlet port is in fluid communication with the primary outlet port and the secondary inlet port. The secondary inlet and secondary outlet ports are adapted for connecting the valving arrangement to one or more additional gas cylinders.

Abstract: Apparatus to visually indicate a leak from a relief valve are disclosed. In one example, an apparatus is disclosed that includes a pipe plug having a head and a shaft. The pipe plug is to attach to a relief valve. An opening is to extend through the head and shaft. The apparatus also includes a first flexible membrane to cover an end of the opening. In some examples, the first flexible membrane is to expand when fluid is released via the relief valve into the opening of the pipe plug.

Abstract: Mounting assemblies for use with fluid control devices are disclosed. An example apparatus includes a bonnet to be coupled to a valve and a mounting assembly including a first side to be coupled to an actuator and a second side to be rotatably coupled at an end of the bonnet to enable a rotational position of the mounting assembly to change relative to the bonnet.

Abstract: Fail-safe apparatus for use with fluid valves are disclosed herein. An example fail-safe apparatus includes a first piston, a second piston movably coupled relative to the first piston, and a fluid chamber between the first and second pistons to receive a control fluid. The control fluid is to operatively couple the first and second pistons when the control fluid is provided in the fluid chamber. The first piston is operatively decoupled from the second piston when at least some of the control fluid is removed from the fluid chamber.

Abstract: A pressure reducing valve including a balanced valve cartridge. The balanced valve cartridge has a retainer including a central bore. A valve seat and a valve plug are disposed within the central bore and cooperate to open and close the valve. A cap closes one end of the central bore, the cap including a blind bore for receiving a portion of the valve plug. Downstream fluid pressure is transmitted into the blind bore through a hollow portion of the valve plug, thus balancing the valve plug within the retainer.

Abstract: Multi-stage fluid regulators are described. An example fluid regulator includes a regulator body having an inlet in fluid communication with a source of pressurized fluid. A first fluid valve is disposed within the regulator body and coupled to the inlet to regulate a pressure of the pressurized fluid at the inlet. A second fluid valve is disposed within the regulator body and coupled to the inlet and, via a passageway, to the first fluid valve. The second fluid valve is to cause a fluid pressure in the passageway to be regulated to a predetermined portion of the pressure of the pressurized fluid at the inlet.

Abstract: Temperature-controlled pressure regulators are described. An example temperature-controlled pressure regulator described herein includes a regulator body having an inlet fluidly coupled to an outlet via a first passageway. A heat block is disposed within the regulator body and receives at least a portion of the first passageway. The heat block is to provide heat to the process fluid as the process fluid flows through the heat block via the first passageway, which separates the process fluid from the heat block.

Abstract: A back pressure regulating valve includes a valve body having a fluid inlet, a fluid outlet, a central bore, a bonnet housing a load spring operatively coupled to a diaphragm, and a chamber in flow communication with the fluid inlet. A valve cartridge includes a housing sized to fit within the central bore and including a first portion, a second portion, a valve guide, and a flow passage. A valve seat is disposed in the housing, and a valve plug is shiftable between an open position permitting flow and a closed position preventing flow. The valve plug engages a valve guide, and a spring biases the valve plug toward the open position. A retainer is disposed adjacent the first portion of the housing and engages a portion of the valve plug to retain the valve plug in the housing.

Abstract: A diaphragm control valve has a universal diaphragm mounting location, the diaphragm control valve includes a bonnet, a valve body, a diaphragm, and a clamping washer. The bonnet includes a first clamping surface that transitions into a first annular retention surface formed by a skirt, and the valve body includes a second clamping surface that transitions into a second annular retention surface formed by an upturned annular lip.

Abstract: A control assembly for a fluid flow control device includes a control element, a load spring, and a spring clip. The control element can be movably disposed for controlling fluid flow, and the load spring biases the control element into a predetermined position. The spring clip contacts the load spring at a plurality of points to dampen vibrations experienced by the load spring, thereby reducing and./or eliminating resonance. The spring clip includes a body plate and first and second opposing arm plates extending away from the body plate. Each arm plate includes a proximal end adjacent the body plate, a distal end spaced away from the body plate, and a finger extending upwardly away from the distal end. A corner at an intersection between the finger and the distal end includes a contoured edge for facilitating attachment of the load spring to the spring clip.

Abstract: An ergonomic hand knob for a control valve includes a valve body and a plurality of flutes disposed in the valve body, each flute including a flute surface. Each flute is asymmetric with respect to an innermost point of the flute surface. A first flute surface has a greater slope than a second flute surface. The first flute surface lays in a direction of tightening from the innermost point and the second flute surface lays in a direction of loosening from the innermost point.

Abstract: Dome-loaded pressure regulators are disclosed. An example pressure regulator includes a body having a pressure inlet and first and second pressure outlets and a first dome-loaded pressure regulating valve fluidly coupled to the pressure inlet, the first pressure outlet, and a first control pressure. The first dome-loaded pressure regulating valve includes a first piston having a transverse bore defining a fluid path through the first piston to fluidly couple the pressure inlet to the first pressure outlet and configured to engage a first valve seat and to respond to the first control pressure to control the flow of fluid between the pressure inlet and the first pressure outlet via the first valve seat. The example pressure regulator includes a second dome-loaded pressure regulating valve fluidly coupled to the pressure inlet, the second pressure outlet, and a second control pressure.

Abstract: An example cascade system includes a manifold having a fluid outlet port to dispense fluid and a fluid valve engaged to the manifold. First and second fluid storage containers are coupled to the manifold. The fluid valve is configured to control a first fluid flow path between the second fluid storage container and the fluid outlet port.

Abstract: A fluid regulator includes a valve block having an inlet arranged for connection to a gas supply and an outlet arranged for connection to an item of gas equipment and defining a flow path. The valve block may include one or more of a pressure regulator, a metering valve, and an on-off switch disposed in the flow path. A rotatable pinion operatively is coupled to the metering valve, and a hand control is coupled to the valve block and rotatable about an axis and includes a toothed rack movable with the hand control. A spring biases the toothed rack toward pinion to provide improved precision and/or less play between internal components. The fluid regulator they also include a balanced gear assembly for rotating a control rod of the valve, and further may be adapted to provide various visual indicators of the on-off the state of the device.

Abstract: A fluid dispensing system includes a manifold having a fluid outlet port to dispense fluid from a plurality of fluid supply containers. The system additionally includes a plurality of valves connected to the manifold for controlling the flow of fluid from the containers. The manifold and valves are configured such that all fluid flow connections are disposed within the manifold, thereby reducing and/or eliminating the amount of piping required external to the manifold. So configured, the valves include simple cartridge-type devices that are easily installed into and removed from the manifold.

Abstract: Dome-loaded pressure regulators are disclosed. An example pressure regulator includes a dome-loaded pressure regulating valve fluidly coupled to a pressure inlet, a pressure outlet, and a control pressure. The pressure regulating valve includes a piston, having a transverse bore defining a fluid path through the piston to fluidly couple the pressure inlet to the pressure outlet configured to engage a valve seat and to respond to the control pressure to control the flow of fluid between the pressure inlet and the pressure outlet via the valve seat.

Abstract: A pressure reducing valve including a balanced valve cartridge. The balanced valve cartridge has a retainer including a central bore. A valve seat and a valve plug are disposed within the central bore and cooperate to open and close the valve. A cap closes one end of the central bore, the cap including a blind bore for receiving a portion of the valve plug. Downstream fluid pressure is transmitted into the blind bore through a hollow portion of the valve plug, thus balancing the valve plug within the retainer.

Abstract: The present disclosure is directed to a flow control device, such as a regulator, for controlling fluid flow between an inlet port and an outlet port, and having an internal adjustment mechanism for varying the outlet pressure of the device, including the pressure required to close the device. The device may include first and second components, such as a body and a bonnet, demountably attached to form a housing of the device and defining an internal device cavity. A piston is disposed and movable within the device cavity, and in fluid sealing relationship with the inner surface of the device cavity. The components and the piston are configured to define a channel within the device cavity placing the inlet port in fluid communication with the outlet port, and with the piston being movable between a closed position preventing fluid flow and an open position allowing fluid flow to the outlet port.

Abstract: A high-pressure regulator includes body having a pressure inlet and a pressure outlet. A piston is disposed in the body and fluidly coupled to the pressure inlet and the pressure outlet. The piston is configured to operate in compression to contact a seat ring for the purpose of controlling the flow of fluid from the pressure inlet to the pressure outlet in response to a pressure applied to a surface of the piston via the pressure outlet. A piston seat circumferentially engages the piston to provide an improved seal at low temperatures.