Abstract: Methods and apparatus to couple manifold blocks to form a manifold are disclosed. An example apparatus includes a first manifold block including a first fluid passageway defining a first opening in a first surface of the first manifold block. The example apparatus includes a first keyway extending along the first surface of the first manifold block. The example apparatus includes a first key to be inserted in the first keyway and a second keyway of a second manifold block to couple the first manifold block to the second manifold block to fluidly couple the first fluid passageway to a second fluid passageway of the second manifold block.

Abstract: Diaphragm interface apparatus to improve a cycle life of a diaphragm are described. An example fluid regulator includes a fluid flow passageway between an inlet and an outlet, where a sensing chamber defines a portion of the fluid flow passageway. A diaphragm senses a pressure in the sensing chamber and a diaphragm interface adjacent the sensing chamber has a curved surface to contact a portion of the diaphragm that moves in response to pressure changes in the sensing chamber. The curved surface affects an amount of stress imparted to the portion of the diaphragm during operation of the fluid regulator.

Abstract: Methods and apparatus to couple manifold blocks to form a manifold are disclosed. An example apparatus includes a first manifold block including a first fluid passageway defining a first opening in a first surface of the first manifold block. The example apparatus includes a first keyway extending along the first surface of the first manifold block. The example apparatus includes a first key to be inserted in the first keyway and a second keyway of a second manifold block to couple the first manifold block to the second manifold block to fluidly couple the first fluid passageway to a second fluid passageway of the second manifold block.

Abstract: A control valve includes a body, a first end cap, a second end cap, an insert, and a piston. The first end cap, second end cap, and insert are removably secured to the body and define a first port, second port, and third port of the control valve, respectively. The piston is positioned within the bore of the body and is movable between a first position in which the first port is in fluid communication with the second port and not with the third port and a second position in which the first port is in fluid communication with the third port and not with the second port.

Abstract: A control valve includes a body, a first end cap, a second end cap, an insert, and a piston. The first end cap, second end cap, and insert are removably secured to the body and define a first port, second port, and third port of the control valve, respectively. The piston is positioned within the bore of the body and is movable between a first position in which the first port is in fluid communication with the second port and not with the third port and a second position in which the first port is in fluid communication with the third port and not with the second port.

Abstract: A fluid flow control device includes a regulator for operating at high pressures and an integral bypass valve. The regulator and the bypass valve each include a control assembly that is movable between an open position and a closed position. The regulator and bypass valves are biased into the open positions and adapted to move into the closed positions when an operating pressure rises to above respective regulator and bypass set-point pressures. The bypass set-point pressure is lower than the regulator set-point pressure such that when the operating pressure rises above the bypass set-point pressure, the bypass valve automatically closes and allows the regulator to perform under normal operating conditions. So configured, the bypass valve is arranged to accommodate at least some of the fluid flow through the system until the operating pressure reaches the normal operating pressure, which is somewhere between the bypass and regulator set-point pressures.

Abstract: Manual overrides for valves are disclosed herein. An example apparatus includes an actuator to move a stem of a valve. The actuator includes a housing defining a bore and a piston disposed in the bore. The example apparatus also includes a rod movably coupled to the housing to extend into the bore, and the piston is to be movable via the rod or a fluid to flow into the bore. The example apparatus also includes a lock to hold the rod in a first position on the housing where the rod is to disable a supply of the fluid to the bore.

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: An example valve described herein includes a bonnet having a bonnet cavity defining a bonnet inner surface, a bonnet outer surface, and a first pressure sensing passageway extending between the bonnet outer surface and the bonnet cavity. A base is coaxially coupled to the bonnet and has a base outer surface, a base cavity that defines a base inner surface, a fluid inlet passageway extending between the base outer surface and the base cavity, a fluid outlet passageway extending between the base outer surface and the base cavity, and a second pressure sensing passageway extending between the base outer surface and the base cavity. A valve element within the base and bonnet cavities controls a fluid flow path through the fluid inlet passageway and the fluid outlet passageway.

Abstract: An example dual check valve device described herein includes a housing and a first check valve in the housing. A second check valve is located in the housing adjacent the first check valve and in substantial axial alignment with the first check valve.

Abstract: Manual overrides for valves are disclosed herein. An example apparatus includes an actuator to move a stem of a valve. The actuator includes a housing defining a bore and a piston disposed in the bore. The example apparatus also includes a rod movably coupled to the housing to extend into the bore, and the piston is to be movable via the rod or a fluid to flow into the bore. The example apparatus also includes a lock to hold the rod in a first position on the housing where the rod is to disable a supply of the fluid to the bore.

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 valve described herein includes a bonnet having a bonnet cavity defining a bonnet inner surface, a bonnet outer surface, and a first pressure sensing passageway extending between the bonnet outer surface and the bonnet cavity. A base is coaxially coupled to the bonnet and has a base outer surface, a base cavity that defines a base inner surface, a fluid inlet passageway extending between the base outer surface and the base cavity, a fluid outlet passageway extending between the base outer surface and the base cavity, and a second pressure sensing passageway extending between the base outer surface and the base cavity. A valve element within the base and bonnet cavities controls a fluid flow path through the fluid inlet passageway and the fluid outlet passageway.

Abstract: An example dual check valve device described herein includes a housing and a first check valve in the housing. A second check valve is located in the housing adjacent the first check valve and in substantial axial alignment with the first check valve.

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: Diaphragm interface apparatus to improve a cycle life of a diaphragm are described. An example fluid regulator includes a fluid flow passageway between an inlet and an outlet, where a sensing chamber defines a portion of the fluid flow passageway. A diaphragm senses a pressure in the sensing chamber and a diaphragm interface adjacent the sensing chamber has a curved surface to contact a portion of the diaphragm that moves in response to pressure changes in the sensing chamber. The curved surface affects an amount of stress imparted to the portion of the diaphragm during operation of the fluid regulator.

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: 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: 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: Dome-loaded pressure regulators are disclosed. An example 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, the pressure outlet, and the pressure control inlet. The piston is configured to contact a valve seat and to control 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 control inlet.