To suppress increase of a pressure loss in a channel and blocking of the channel due to water adhering to a rectification mesh provided downstream of a butterfly valve. A fuel cell system includes: a butterfly valve provided on a pipe between a fuel cell and another component; and a rectification mesh provided on a downstream side of gas flowing in the pipe relative to the butterfly valve, a mesh that rectifies a flow of the gas being formed in the rectification mesh. The rectification mesh has, in its lower end part in a vertical direction, a first opening part in which the mesh is not formed.

This invention relates to twin seal rotary valves and Hybrid High Integrity Pressure Protection System (H-HIPPS) for critical services, the hybrid system includes a quick isolation subsystem between an overpressure zone and a normal pressure zone and a quick releasing subsystem between the overpressure zone and a lower pressure zone with quadruple redundancies for long service without repair, more particularly, the hybrid system has the novel rotary valve with at least two offsets, twin closure members, twin wedge seal seat assemblies, the valve operation mechanism is a combination of rotary movements and linear movement between close and open positions for blocking and releasing over pressurize fluids and protecting and the valves and the pipelines or the process plants from surge pressure, fire or leak at the highest level of a system reliability.

This invention relates to twin seal rotary valves and Hybrid High Integrity Pressure Protection System (H-HIPPS) for critical services, the hybrid system includes a quick isolation subsystem between an overpressure zone and a normal pressure zone and a quick releasing subsystem between the overpressure zone and a lower pressure zone with quadruple redundancies for long service without repair, more particularly, the hybrid system has the novel rotary valve with at least two offsets, twin closure members, twin wedge seal seat assemblies, the valve operation mechanism is a combination of rotary movements and linear movement between close and open positions for blocking and releasing over pressurize fluids and protecting and the valves and the pipelines or the process plants from surge pressure, fire or leak at the highest level of a system reliability.

An embodiment of a valve includes a housing having at least an actuator chamber above a main fluid passage. A flow control member is mounted to a first longitudinal end of the valve shaft extending into, and is rotatable in, the main fluid passage. The linear actuator is retained in the actuator chamber, and includes a piston rod connected to at least one piston, and a slot formed transverse to a length of the piston rod. A yoke assembly includes a crank connected proximate to the second end of the valve shaft, A bearing assembly connecting the valve shaft and the piston rod includes at least one bearing connected to the crank such that the yoke assembly is adapted to translate linear motion of the piston shaft to rotational motion of the valve shaft, and vice versa.

An improved mechanical dump valve for a liquid level control system. The dump valve comprises a splined shaft that communicates with the valve actuator by a toothed member, such as a splined bore in a dump valve hub. The dump valve also may include pressure ports. Still further, the present invention includes a liquid level control system comprising a trunnion assembly and a mechanical dump valve in which the trim motion of the float valve is transmitted by means of splined shafts in both the trunnion assembly and the dump valve assembly. The inventive system may comprise float weights for weighting the float accurately without having to drill the float and load it with sand or other weighting material. Also included is a kit for retrofitting existing liquid level control systems that use D-shaped connections with splined components.

An improved mechanical dump valve for a liquid level control system. The dump valve comprises a splined shaft that communicates with the valve actuator by a toothed member, such as a splined bore in a dump valve hub. The dump valve also may include pressure ports. Still further, the present invention includes a liquid level control system comprising a trunnion assembly and a mechanical dump valve in which the trim motion of the float valve is transmitted by means of splined shafts in both the trunnion assembly and the dump valve assembly. The inventive system may comprise float weights for weighting the float accurately without having to drill the float and load it with sand or other weighting material. Also included is a kit for retrofitting existing liquid level control systems that use D-shaped connections with splined components.

It is to realize a valve remote control apparatus capable of driving and controlling, with wireless signals, an air motor configuring an automatic switch to be attached to a manual valve. A valve remote control apparatus is configured to mechanically connect, to a manual operating portion 11 of an existing manual valve 10, an output shaft 21a of an air motor 21 using an air pressure as a drive source, and to remotely control the manual value 10. The valve remote control apparatus includes a solenoid valve (operating valve 53) operated by an operation signal transmitted and received wirelessly between a contact information terminal portion 51 and a contact information operating portion 52. The air pressure for driving and rotating the air motor 21 is supplied via the solenoid valve (operating valve 53).

It is to realize a valve remote control apparatus capable of driving and controlling, with wireless signals, an air motor configuring an automatic switch to be attached to a manual valve. A valve remote control apparatus is configured to mechanically connect, to a manual operating portion 11 of an existing manual valve 10, an output shaft 21a of an air motor 21 using an air pressure as a drive source, and to remotely control the manual value 10. The valve remote control apparatus includes a solenoid valve (operating valve 53) operated by an operation signal transmitted and received wirelessly between a contact information terminal portion 51 and a contact information operating portion 52. The air pressure for driving and rotating the air motor 21 is supplied via the solenoid valve (operating valve 53).

A foot-operated water flow control system for regulating water flow to a shower head. The shower head is connected to a first shower arm. A second shower arm is connected to a water supply line. A solenoid valve has an inlet port connected to the first shower arm and an outlet port connected to the second shower arm. A first electrical wire connects the solenoid valve to a power source, a second electrical wire connects an air pressure switch to the power source, and a third electrical wire connects the air pressure to the solenoid valve. An air pump is connected to the air pressure switch via an air hose. Foot compression of the air pump generates air pressure to close the air pressure switch. The power source supplies electrical power to the solenoid valve, which is actuated into an opened position and water flows to the shower head.

A bypass strainer valve assembly can be used for controlling the flow of a fluid. The bypass strainer valve assembly can have a valve body with a valve body inlet, a valve body outlet, and a filter chamber. A first valve element can be moveable within the valve body between a first position and a second position, and a second valve element can be moveable within the valve body between a first position and a second position. The first valve element in the first position and the second valve element in the first position can be configured to cooperatively direct fluid through the filter chamber, as the fluid flows from the valve body inlet to the valve body outlet.