It is provided a fluid flow control device for establishing a controllable fluid communication between an external fluid reservoir and a base pipe constituting part of a production string, as well as a production string and a method using such a fluid flow control device. The fluid flow control device comprises a primary flow path arranged inside a fluid control device housing, a secondary flow path and a movable valve element arranged at and/or within the primary flow path. The inlet of the secondary flow path is arranged separate from the inlet of the primary flow path.

An excess flow and thermal valve assembly includes a valve housing, a valve carried in the housing and displaceable during excess flow conditions to reduce flow of fluid through the assembly, and an intumescent or intumescent material carried in the valve housing and expandable during excess temperature conditions to reduce flow of fluid through the assembly.

A diaphragmatic elbow damper joining two angularly oriented channels and configured to seal the channels in the absence of fluid flow overcoming gravity and atmospheric pressure.

A distributed fuel module includes a fuel pressure vessel with a gas port and a fuel port, a hydraulic circuit breaker connected to the fuel port, and a gaseous circuit breaker. The gaseous circuit breaker is connected to the gas port, is fluidly coupled to the hydraulic circuit breaker through the fuel pressure vessel, and is cooperatively associated with the gaseous circuit breaker to isolate the fuel pressure vessel from a compressed gas header and a fuel header according to pressure differential within the hydraulic circuit breaker and pressure differential within the gaseous circuit breaker. Power modules and methods of controlling fuel flow in fuel modules are also described.

A flow self-adjusting faucet aerator includes an aerator unit. Upper and lower ends of the aerator unit have a water inlet and a water outlet, respectively. A flow regulator is fitted in the water inlet of the aerator unit. The flow regulator can automatically adjust the discharge area according to the change of the water pressure of the influent water flow to maintain the stability of the water outflow.

A check valve, including a valve and a valve support surface, to permit a fluid to move through the check valve in a first direction and resist a fluid flow through the valve in a second direction, the valve having a valve diaphragm and an isolating bridge, with a portion of the valve engaging against valve support surface to resist deformation or stretching of the valve when a backflow of fluid into the check valve occurs. The valve support surface having a first support surface and a second support surface, and the valve positioned with the valve diaphragm spaced apart from the first support surface, and the isolating bridge spaced apart from the second support surface.

A flow regulating device (60) and a gas water heater (1) having the same are provided. The flow regulating device (60) includes a housing (100) defining a water inlet (110) and a water outlet (120) therein; a flow regulating assembly (200) disposed in the housing (100), a temperature-flow regulating orifice (230) located between the water inlet (110) and the water outlet (120) being defined in the flow regulating assembly (200), and the flow regulating assembly (200) further including a regulating component for regulating opening of the temperature-flow regulating orifice (230); a temperature sensitive assembly (300) disposed in the housing (100) and connected to the regulating component, and the temperature sensitive assembly (300) driving the regulating component according to temperature of water in the housing (100). The flow regulating device has advantages of short regulating time, and high regulating precision.

A control valve (100) for regulating a fluid flow in an HVAC system is described, the control valve (100) comprising a valve housing (11) defining a flow path (12), a valve regulating body (13) arranged in the flow path (12) and being adjustable between a closed position and an open position for the fluid flow, and a flow regulating insert (14) configured to regulate the fluid flow over a range of pressure differences across the flow regulating insert (14), wherein the flow regulating insert (14) comprises a spatially fixed pin (141) and an elastically deformable annular throttling member (142) encompassing at least a part of the pin (141), wherein the annular throttling member (142) defines an orifice (143) in the flow regulating insert (14) for the passage of the fluid flow, the orifice (143) being modifiable by deformation of the annular throttling member (142) under a pressure difference across the flow regulating insert (14).

A diaphragmatic elbow damper joining two angularly oriented channels and configured to seal the channels in the absence of fluid flow overcoming gravity and atmospheric pressure.

A check valve, including a valve and a valve support surface, to permit a fluid to move through the check valve in a first direction and resist a fluid flow through the valve in a second direction, the valve having a valve diaphragm and an isolating bridge, with a portion of the valve engaging against valve support surface to resist deformation or stretching of the valve when a backflow of fluid into the check valve occurs. The valve support surface having a first support surface and a second support surface, and the valve positioned with the valve diaphragm spaced apart from the first support surface, and the isolating bridge spaced apart from the second support surface.