A pumping element comprises a first flow chamber; a second flow chamber in fluid connection with the first flow chamber, the second flow chamber including a shoulder; a check valve including a first insert and a second insert, the first insert being movable between a first position wherein the first insert forms a seal that inhibits fluid flow between the first and second flow chambers and a second position wherein the first insert permits fluid flow between the first and second flow chambers, the second insert being inserted into the second flow chamber to an extent limited by the shoulder; and a spring having a first end engaging the first insert and a second end engaging the second insert; wherein the first insert moves from the first position to the second position against a biasing force of the spring in response to pressurized fluid in the first flow chamber.

The present invention provides a switching valve comprising: a housing including a first port, a second port, and a third port; a valve element configured to be movable in the housing so as to selectively allow one of the first port and the second port to communicate with the third port in accordance with a pressure difference between the first port and the second port; and a pressing member configured to press the valve element toward a side of the first port.

Embodiments of air admittance valve assembly and plumbing system incorporating the same are provided herein. In some embodiments, a valve assembly to allow or stop a flow for use with enclosed environment includes a housing having, an inlet disposed at a first end of the housing fluidly coupled to environment surrounding housing, an outlet disposed at a second end of housing fluidly coupled to enclosed environment, and an interior volume divided into a first zone, a second zone, and a third zone, a first valve having a first valve seat and a first sealing member urged by an existing force between a closed or open position; and a second valve having a second valve seat and a second sealing member urged by an existing force between a closed or open position.

A break check valve includes a valve body defining a mating surface and a valve inner cavity; a pivot pin positioned inside the valve inner cavity and secured to the valve body, an axis of the pivot pin offset in a radial direction with respect to a longitudinal axis of the valve body; and a valve member positioned within the valve inner cavity and configured to rotate about the pivot pin from an open position to a closed position of the valve, the valve member comprising a plate and an arm extending from the plate, the valve member configured to remain in the open position of the valve as long as a mating surface of a hydrant remains in contact with the mating surface of the valve body and configured to close when the mating surface of the hydrant is separated from the mating surface of the valve body.

A coaxial liquid pressure regulator includes a housing having an inlet portion and an outlet portion, a substantially tubular valve member slidingly accommodated inside the housing and having a longitudinal axial passage and an upstream end with an inlet edge for the liquid, a valve body fixed inside the inlet portion and defining a seat that interacts with the inlet edge of the valve member and forms therewith a port having a variable width. The inlet portion includes an inlet fitting and a collection chamber directly downstream from the inlet fitting and the valve body includes a cantilever element transversely extending from the inner wall of the collection chamber. First and second deflection elements are arranged between the inlet fitting and the inlet edge, which facilitate flow conveyance toward the port and the longitudinal passage of the valve member.

An assembly for a tire pressure management system includes a housing. The housing includes a first branch and a second branch. The second branch is oriented at an oblique angle with respect to the first branch. The first branch and the second branch are in fluid communication with each other and a main branch. The main branch is rotatable with respect to the first branch. A valve assembly is housed within the first branch. The valve assembly provides selective fluid communication between a portion of the tire pressure management system and the main branch. A pressure relief valve assembly is housed within the second branch. The pressure relief valve assembly provides selective fluid communication between the assembly and the atmosphere.

A valve 10, for relieving ground water pressure on a swimming pool for containing pool water. A body 30 defines a flow path. An element 20 is mounted to be moved in a direction from a position, in which at least one feature 22 of the element co-operates with at least one feature 33 of the body to form a sealing arrangement to block the flow path to retain the pool water, to a position in which the flow path is open to allow ground water into the swimming pool. The sealing arrangement defines an effective area over which the ground water pressure acts to drive the element in the direction, and an effective area over which pool water pressure acts to drive the element opposite the direction. The co-operable features are configured such that a ratio, of the effective area over which the ground water pressure acts to the effective area over which pool water pressure acts, has a value of at least 0.9.

Venturi devices are disclosed that have a housing defining a conduit having a Venturi gap. Downstream of and bypassing the Venturi gap is a bypass check valve that defines an internal cavity having a first seat, a second seat, an inlet port, at least two outlet ports, and a seal member seated therein that is translatable between a closed position against the first seat and an open position against the second seat. The two outlet ports of the bypass check valve enter the conduit at opposing positions disposed a distance from a top of the conduit, which is located at a midsagittal plane of the housing. Further, a transition from a tapering section downstream of the Venturi gap and upstream of each of the two outlet ports to a discharge section downstream of the two outlet ports forms a gradually, continuously tapering interior surface of the conduit.

An electrically driven actuator for opening and closing a valve comprises: an electric motor (1); a movable plate (8), to which a valve body is connected; a conversion mechanism (3) configured to convert a rotational motion of the electric motor (1) to a linear motion; a first biasing member (11) configured to bias the movable plate (8) toward a first direction; and a second biasing member (12) configured to bias the conversion mechanism (3) toward a second direction. The valve body is to be opened when a part of the conversion mechanism (3) linearly moves to move the movable plate (8) toward the second direction, and is to be closed when the first biasing member (11) biases the movable plate (8) toward the first direction. The conversion mechanism (3) is configured to be displaced relative to the movable plate (8) in a state in which the valve body is closed.

A method, system, and apparatus are provided for a safety relief bypass system for an oil pumping pipeline that provides pressure relief to the pipeline in order to prevent and reduce pipeline rupture. More specifically, the bypass system can include one or more rupture discs having a specific burst pressure that allows fluids under pressure to bypass through alternative pipeline thereby preventing damage to other piping components.