A valve actuating assembly is provided that comprises a cam holder positioned within a valve body of an internal valve, a cam operably coupled to the cam holder and configured to engage a valve stem of the internal valve for moving the internal valve between a first position and a second position, and an actuating shaft extending through at least a portion of the valve body, rotation of the actuating shaft causing rotation of the cam holder and the cam, wherein the actuating shaft is removably coupled to the cam holder such that the actuating shaft can be decoupled from the cam holder and removed from the valve body, the cam holder and the cam being configured to remain positioned within the valve body when the actuating shaft is decoupled from the cam holder and removed from the valve body.

A vent valve opens to provide a fluid path from a regulated pressure port to a vent port, a supply valve opens to provide a fluid path from the regulated pressure port to a supply pressure port. A control piston has a linear cam profile with a vent cam that opens the vent valve and a supply cam that opens the supply pressure valve.

A system includes a valve, handle, guide, arm, channel, and projection. The handle is proximate the valve and is configured to open and close the valve. The handle is in a first position when the valve is open and in a second position when the valve is closed. The guide is connected to the handle. The arm is connected to the guide. The channel is located on one of the guide or the arm, the channel having opposed first and second ends. The projection is located on the other of the guide or the arm, the projection configured to be received in the channel. Moving the projection past a location of the first end of the channel pulls the guide and the handle, thereby moving the handle from the first position to the second position. The projection can be moved toward the second end while the handle remains in the second position.

A pressure release valve, having three or more cavities is described. The pressure release valve comprises a valve body with at least three valve cavities for fluid. The first valve cavity contains high-pressure fluid and the second cavity contains low-pressure fluid. The first, second, and third cavities are separate and apart from one another. The pressure release valve further includes a movable valve body shaft with a valve hammer and an elastic spring body. The pressure release valve further includes a channel and a valve port, wherein when pressure is applied to the movable valve body shaft, the movable valve body shaft is actuated to press against the valve hammer forcing the valve hammer to move opening the port allowing fluid to flow from the first cavity, to the second cavity and the third cavity.

A relief device in air pump includes a main body defining an interior space and a discharge passage fluidly communicating with the interior space. The discharge passage is selectively closed and opened by a valve device. The valve device is movable in the discharge passage. The valve device includes a first sealing portion and a second sealing portion selectively engaging with the discharge passage. The valve device is movable between a first position in which one of the first and the second sealing portions engages with the discharge passage and a second position in which the other of the first and the second sealing portion engages with the discharge passage. The discharge passage has a length measuring from the first end to the second end thereof, which is smaller than a length which measures a separation distance between the first and the second sealing portions.

Disclosed herein is a positive pressure relief valve having a valve assembly, a trigger mechanism, an inlet manual override knob, and an outlet manual override knob. The valve assembly may comprises a valve throat and a main piston positioned at least partially within the valve throat, the main piston configured to selectively open and close the valve throat as a function of a pressure at the inlet to the valve assembly. The valve assembly may comprise a set of throat inserts within the valve throat. The trigger mechanism serves to quickly pressurize the main piston's diaphragm. The trigger mechanism may be positioned in a trigger mechanism housing at the outlet end of the valve assembly. The inlet and outlet manual override knob may be coupled to the main piston and configured to pull or push the main piston, thereby displacing the main piston to open the valve assembly.

An integral valve arrangement may comprise a housing. The housing may comprise a main valve and a relief valve. The main valve may comprise an inlet and a first outlet. The relief valve may comprise a relief inlet in a side wall of the inlet, a relief outlet in a side wall of the first outlet, and a pressure relief system. The inlet and the first outlet may be substantially axially perpendicular. The relief inlet and the relief outlet may be substantially axially perpendicular. The pressure relief system may comprise a body abutting walls of the housing, a relief member disposed within the body, and a lever. The relief member may comprise an interior end and an exterior end. The lever may be rotatably coupled to the exterior end of the relief member by a connecting mechanism.

The T&P relief valve includes a valve casing. A valve assembly is carried by the valve casing and includes a moveable valve shaft and associated valve head sealingly biased against a valve seat by a valve spring which is sealed within a protective chamber configured to contain a first protective fluid. The valve spring is protected, by the protective chamber and first protective fluid, from corrosion, calcification and/or mineral deposits which would affect the valve assembly. A thermal element assembly is carried by an internal tongue of the valve casing. A plunger casing, encasing the upper end of the elongated plunger body and sealing around the captive plunger, is configured to contain a second protective fluid to protect the upper end and captive plunger from corrosion, calcification and/or mineral deposits which could affect the thermal element. An end cap assembly includes a casing seal held against the protective chamber by an end cap that is secured to, and closes, the open top of the valve casing.

An anode discharge valve for a fuel cell system includes a valve main body which is installed in a hydrogen recirculation line of a fuel cell stack; a drive shaft which is rotatably installed in the valve main body, and coupled to an opening member which selectively opens a hydrogen discharge port by being rotated; and a mechanism which is connected to a hydrogen inlet port of the valve main body so as to form a hydrogen inflow path, and operates to rotate the drive shaft as a pressure of hydrogen inflowing through the hydrogen inflow path increases.

Exemplary embodiments of a safety nozzle and safety valve for portable gasoline containers are provided. A safety nozzle for a container can be provided, including a proximal end configured for placement in a safety valve, a distal end having a spout, a housing having an elongated portion extending from the proximal end to the distal end, a sliding bezel extending from an exterior of the housing to a sliding piston in an interior of the housing, a piston head having a first end at the proximal end and a second end for abutment with the sliding piston in the interior of the housing, and a retaining spring configured to maintain a holding pressure on the sliding piston to maintain the piston head in a closed position preventing liquid flow from the proximal end into the housing.