A system for and method to control and improve throughput of liquid in a sewer system utilizes a generally gas free column of sewer pipes. A single manhole has a separate section to handle waste water and a separate section to handle surface water, with pipes operatively connected to them. Valves connected to the manhole and pipes are opened and closed to prevent outlet as well as to prevent gas from entering the outlet to keep the sewer pipes filled with liquid, and fluid travels pipe-in-pipe and forms a gravity flow high capacity (full current) column.

In one aspect, a valve includes a valve body rotatable about a central axis of the valve body, an interior channel adjacent the valve body for permitting a fluid to flow through an axial opening of the interior channel, and a plug within the interior channel that is movable between a first axial position at the axial opening and a second axial position spaced apart from the axial opening. In the first axial position, the plug closes the axial opening to prevent the fluid from flowing through the axial opening in a first direction and to prevent the fluid from flowing through the axial opening in a second direction that is opposite to the first direction. In the second axial position, the plug permits the fluid to flow through the axial opening into the interior channel in the first direction.

In one aspect, a valve includes a valve body rotatable about a central axis of the valve body, an interior channel adjacent the valve body for permitting a fluid to flow through an axial opening of the interior channel, and a plug within the interior channel that is movable between a first axial position at the axial opening and a second axial position spaced apart from the axial opening. In the first axial position, the plug closes the axial opening to prevent the fluid from flowing through the axial opening in a first direction and to prevent the fluid from flowing through the axial opening in a second direction that is opposite to the first direction. In the second axial position, the plug permits the fluid to flow through the axial opening into the interior channel in the first direction.

A cryogenic valve includes a first port and a second port, a valve body, a valve stem, a sealing member, a valve element and a housing. The valve body includes a valve seat defining a fluid orifice in fluid communication with the first port. The valve stem is configured to engage with the valve body, wherein at least one of the valve stem and valve body form an inner valve cavity. The valve element is positioned within the inner valve cavity. The valve element is also configured to bias the sealing member against the orifice to substantially block flow through the orifice and the first port. The bias is controlled in response to control of the valve element by a valve actuator. A channel is configured to allow fluid flow through at least one of the valve stem and valve element along a longitudinal axis. A housing is configured to substantially seal and enclose at least a portion of the valve body and valve stem. The housing forms an inner housing cavity configured to thermally isolate the exterior of the valve body and valve stem from the housing.

A cryogenic valve includes a first port and a second port, a valve body, a valve stem, a sealing member, a valve element and a housing. The valve body includes a valve seat defining a fluid orifice in fluid communication with the first port. The valve stem is configured to engage with the valve body, wherein at least one of the valve stem and valve body form an inner valve cavity. The valve element is positioned within the inner valve cavity. The valve element is also configured to bias the sealing member against the orifice to substantially block flow through the orifice and the first port. The bias is controlled in response to control of the valve element by a valve actuator. A channel is configured to allow fluid flow through at least one of the valve stem and valve element along a longitudinal axis. A housing is configured to substantially seal and enclose at least a portion of the valve body and valve stem. The housing forms an inner housing cavity configured to thermally isolate the exterior of the valve body and valve stem from the housing.

A shoe in form of a slipper or sandal, includes a body 100 adapted to have a first fluid casing 12 and a second fluid casing 14, each having an elastic property, embedded in the front and rear portions of the body, respectively, and an instep strap 120 supported to the body in such a way as to be rotated in a specific section. A rotating shaft 16 is rotated in conjunction with the instep strap, and it includes a first connecting portion connected to the first fluid casing and a second connecting portion connected to the second fluid casing and an internal passage having respective check ball seating portions formed on the inside of the first and the second connecting portions, and with check ball received in the internal passage. When the rotating shaft is inclined by rotation of the rotating shaft, the check ball closely adheres to any one of the check ball seating portions by gravity or buoyancy and regulates a fluid flow to any one of the first and the second connecting portions.

A shoe in form of a slipper or sandal, includes a body 100 adapted to have a first fluid casing 12 and a second fluid casing 14, each having an elastic property, embedded in the front and rear portions of the body, respectively, and an instep strap 120 supported to the body in such a way as to be rotated in a specific section. A rotating shaft 16 is rotated in conjunction with the instep strap, and it includes a first connecting portion connected to the first fluid casing and a second connecting portion connected to the second fluid casing and an internal passage having respective check ball seating portions formed on the inside of the first and the second connecting portions, and with check ball received in the internal passage. When the rotating shaft is inclined by rotation of the rotating shaft, the check ball closely adheres to any one of the check ball seating portions by gravity or buoyancy and regulates a fluid flow to any one of the first and the second connecting portions.

An installation assembly for installing and/or removing a ball into and/or from a valve body of a top entry ball valve includes a valve body having at least one blind bore disposed on an opposite side of the ball chamber from the entry opening and a ball installation tool adapted to interact with the blind bore so as to compress a spring disposed inside the ball chamber substantially axially. A top entry ball valve is arranged with such a valve body. The ball installation tool may be used to install and/or remove a ball from the valve body.

An expansion valve includes: a body having an insertion hole in a partition separating a first passage from a second passage; a power element configured to generate a drive force for opening or closing a valve section; a shaft extending through the insertion hole and configured to transmit the drive force to a valve element; a vibration-proof spring coaxially supporting the shaft and biasing the shaft radially inward to apply a sliding resistance thereto; and a flexible O-ring supported by one of an inner surface of the support part defining the insertion hole and an outer surface of the shaft and being in close contact with the other thereof. The O-ring, sliding portions of the shaft and the support part, and the vibration-proof spring are arranged in this order from a first passage side toward a second passage side in an axial direction of the shaft.

An expansion valve includes: a body having an insertion hole in a partition separating a first passage from a second passage; a power element configured to generate a drive force for opening or closing a valve section; a shaft extending through the insertion hole and configured to transmit the drive force to a valve element; a vibration-proof spring coaxially supporting the shaft and biasing the shaft radially inward to apply a sliding resistance thereto; and a flexible O-ring supported by one of an inner surface of the support part defining the insertion hole and an outer surface of the shaft and being in close contact with the other thereof. The O-ring, sliding portions of the shaft and the support part, and the vibration-proof spring are arranged in this order from a first passage side toward a second passage side in an axial direction of the shaft.