Fluid valves with an anti-stagnation trim guide are disclosed herein. An example valve includes a valve body including a fluid inlet, a fluid outlet, and a fluid passageway extending between the fluid inlet and the fluid outlet, a plug disposed in the fluid passageway, and a trim guide positioned between the plug and the valve body, the trim guide including at least one balance passageway, the balance passageway to guide trapped process fluid to enter or exit an area between the plug and a bonnet of the valve during movement of the plug.

A check valve includes a housing defining an inlet, an outlet, a passage between the inlet and outlet, and a sealing surface along the passage. A piston member is disposed about a longitudinal axis and has a sealing face disposed perpendicular to the longitudinal axis and a circular groove defined therein extending inward from the sealing face. An O-ring is disposed in the groove. A biasing member exerts a biasing force on the piston and thus forces the O-ring into sealing engagement with the sealing surface of the housing. The piston member is moveable from a first position in which the O-ring is sealingly engaged with the sealing surface of the housing and thus the outlet is sealed from the inlet, and a second position in which the O-ring is spaced from the sealing surface of the housing and thus the outlet is not sealed from the inlet.

An adapter is provided for a solenoid of a valve. The adapter provides a radial seal and enables manually bleeding by rotating the solenoid. The adapter includes two primary components with a one-way locking engagement between them that can be manually reversed for service of the adapter and the solenoid.

An air injection apparatus is provided according to one embodiment of the present invention. The air injection apparatus includes a main body in which an air passage is formed, and an opening and closing part which is coupled to one end of the main body and in which an opening and closing protrusion having a predetermined length, protruding toward the air passage, and configured to open or close the air passage is formed on an inner surface thereof, wherein at least a part of the opening and closing protrusion may be inserted into the air passage to seal the air passage when the opening and closing part is moved in a first direction toward the main body.

A fluid distribution manifold may receive a first required flow rate for a first flow of fluid that flows to a fluid handling device or a reservoir. A first operation state may be determined for a first valve assembly that regulates the first flow, the manifold may operate the first valve assembly based on the first operation state, and a first position tracker may be incremented based on the first operation. Based on a value of a cycle tracker, the manifold may identify a second valve assembly in an operation cycle and access a second control input that includes a second required flow rate for a second flow of fluid regulated by the second valve assembly. The manifold may cause the second valve assembly to operate based on at least one of a second operation state and a change in the second actual flow rate resulting from the first operation.

An outlet valve includes a valve body, a solenoid valve, and a manual operating member. The valve body includes a water inlet, a water outlet, a water storage cavity, a drain waterway, a first waterway, a second waterway, and a waterproof membrane. The first waterway is coupled to the drain waterway through a first drain opening. The second waterway is coupled to the drain waterway through a second drain opening. The waterproof membrane is configured to separate the water outlet cavity from the water storage cavity. The first waterway comprises a first plug coupled to an output end of the solenoid valve. The first plug is configured to control the opening and closing of the first drain opening. The second waterway comprises a second plug coupled to the manual operating member. The second plug is configured to control the opening and closing of the second drain opening.

A valve control is configured for use with control valves and other flow controls. The valve control leverages a simplified structure to avoid problems with manufacture and reduce costs. This structure includes a support unit that compresses parts of a valve housing together. Inside of the valve housing, the structure incorporates diaphragms that cause a pair of balanced valves to move in response to changes in pressure of fluid in a conduit. For industrial application, the valve control finds use to maintain pressure of natural gas in pipelines downstream from a control valve.

A valve unit has a fluid housing through which a fluid duct extends from a first opening across a valve seat to a second opening, a valve drive connected to the fluid housing and configured to drive a valve closing body cooperating with the valve seat, the valve closing body coming into contact with the fluid in operation on the face side facing the valve seat and on a side facing away from the valve seat, and a connecting plate having a connecting surface to which the fluid housing can be mounted and in which a fluid supply duct and a fluid outlet duct are formed. The fluid housing is adapted to be mounted to the connecting plate in a first position and in a second position rotated in relation to the first position through 180 degrees relative to an imaginary axis of rotation extending perpendicularly to the connecting surface, wherein during operation of the valve unit, with a direction of flow of the fluid through the connecting plate remaining unchanged, a flow over the seat takes place in the first position and a flow under the seat takes place in the second position.

A mounting seat for a pressure relief device. The mounting seat comprises a main body portion, a blocking portion and a lug. The main body portion has a circular cross section. The blocking portion is circumferentially arranged on an outer surface of the main body portion and is formed by extending outward from the outer surface of the main body portion. The lug is located below the blocking portion and is separated from the blocking portion by a distance, and the lug extends outward from the outer surface of the main body portion. The pressure relief device of the present application, through its rotation, may be securely mounted to a housing of the battery pack, without requiring additional mounting parts and tools, which greatly simplifies the mounting process of the battery pack.

An electromagnetic valve includes: a solenoid having a plunger movably supported along an axial direction; a flow path member having a fluid passage flow path and a valve element housing portion; and a valve element disposed in the valve element housing portion and movable along the axial direction together with the plunger. The valve element includes: a body part in a tubular shape having a wall portion closing one axial end side and an opening at the other axial side; a valve part fixed to one axial side of the wall portion for opening and closing the flow path as moving together with the plunger; and a core member in a columnar shape that is movable along the axial direction inside the body part, and that is in contact with the wall portion on the one axial side and the plunger on the other axial side.