A chemical stick launcher includes a stack of vertically mounted low voltage electrically operated valves providing spaces between the valves for chemical sticks. The valves are manipulated by a controller to drop sticks from the compartments between the valves after suitable time delays so the launcher can supply chemicals to a hydrocarbon well over a period of time. The stack is insulated to reduce the operating temperature of the launcher and thereby allow a wider variety of chemical compositions to be used. The low voltage electrically operated valves include a front panel providing a visual indicator of whether the valves are open or closed. The valves are mounted on the stack so the front panels face in the same direction so a standing person can see all the indicators from a single position.

A valve assembly is disclosed, which includes a valve body defining a valve chamber and a moveable member. The moveable member has a valve element at its first end and an armature at its second end. The moveable member is moveable in an axial direction to selectively open and close the valve. The entire moveable member is spaced from the walls of the valve body when the valve is open or partially open. A flexible membrane forms a seal against the moveable member and the valve body to divide the valve chamber into a flow chamber in which the valve seat and valve element are located and a pressure compensation chamber within which the armature is entirely enclosed. A first fluid port is fluidly connected to the pressure compensation chamber via one or more bores in a pressure compensation flow path with at least one opening extending into the pressure compensation chamber at an axial position between the armature and the flexible membrane. The pressure compensation flow path includes a first axial portion with a first cross-sectional area and a second axial portion with a second, smaller cross-sectional area.

In one embodiment, a fluid dynamics system includes a solenoid valve including a valve body including ports including an inlet and outlet port, and a valve cavity having a direction of elongation and configured to provide fluid connectivity between ones of the ports, a solenoid coil disposed around valve cavity, and a plunger including a permanent magnet, and configured to move back-and-forth along the direction of elongation between a first and a second position in the valve cavity selectively controlling the fluid connectivity between respective ones of the ports, the valve body including shock absorber(s) to soften striking of the plunger against the valve body in the direction of elongation, and a controller configured to apply at least one current to the solenoid coil to selectively move the plunger between the first and second position, and to selectively maintain the plunger in the first position and the second position.

In some embodiments, a fluid dynamics system includes a solenoid valve including a valve body including ports including an inlet port and an outlet port, and a valve cavity having a direction of elongation and configured to provide fluid connectivity between respective ones of the ports, a solenoid coil disposed in the valve body around valve cavity, and a plunger comprising a permanent magnet, and configured to move back-and-forth along the direction of elongation between a first position and a second position in the valve cavity selectively controlling the fluid connectivity between respective ones of the ports, and a controller configured to apply at least one current to the solenoid coil to selectively move the plunger between the first position and the second position, and to selectively maintain the plunger in the first position and the second position.

The cooling water temperature control device includes a thermo valve 2 that opens a main flow passage R1 when the temperature of a sensed region R1a in the main flow passage R1 reaches or exceeds an operating temperature set in advance, a sub-valve 3 that opens and closes a sub-flow passage R2 bypassing the thermo valve 2, and a control unit 6 that opens the sub-valve 3 when the temperature of the cooling water on an upstream side of the thermo valve 2 is a predetermined temperature. One end on the upstream side of the sub-flow passage R2 is connected to the sensed region R1a in the main flow passage R1 or to a downstream side of the sensed region R1a, and the operating temperature of the thermo valve 2 is set to be equal to or lower than the predetermined temperature.

The invention relates to a valve device (100) for a gaseous medium, in particular hydrogen, comprising a valve housing (6) and a solenoid armature (14) which is arranged in the valve housing and can move along the longitudinal axis (18) and which interacts with a first sealing seat (32) in order to open and close an outlet opening (40). Furthermore, the valve housing (6) is equipped with a second solenoid armature (16) which can be moved along the longitudinal axis (18) and which is at least partly received in a recess (38) of the first solenoid armature (14), and the second solenoid armature (16) interacts with a second sealing seat (34) in order to open and close an outlet opening (20) formed in the first solenoid armature (14). The first solenoid armature (14) and the second solenoid armature (16) are additionally surrounded by a magnet device (11), by means of which the first solenoid armature (14) and the second solenoid armature (16) can be moved along the longitudinal axis (18) using precisely one solenoid (10).

Responsiveness is improved in valve opening and valve closing of an electromagnetically driven intake valve unit in which a valve is provided on a pressurizing chamber side of a valve seat. The valve includes an annular abutting surface that abuts the valve seat to shut off a fuel intake passage and a bottomed cylindrical part provided at an inner peripheral part of the annular abutting surface. The bottomed cylindrical part is inserted into a fuel introduction hole formed in the valve housing inside the valve seat, and the outer surface of an end part of the bottomed cylindrical part is exposed to fuel in a low pressure fuel chamber provided upstream of the fuel introduction hole.

The invention relates to a valve device (100) for a gaseous medium, in particular hydrogen, comprising a valve housing (6) and a solenoid armature (14) which is arranged in the valve housing and can move along the longitudinal axis (18) and which interacts with a first sealing seat (32) in order to open and close an outlet opening (40). Furthermore, the valve housing (6) is equipped with a second solenoid armature (16) which can be moved along the longitudinal axis (18) and which is at least partly received in a recess (38) of the first solenoid armature (14), and the second solenoid armature (16) interacts with a second sealing seat (34) in order to open and close an outlet opening (20) formed in the first solenoid armature (14). The first solenoid armature (14) and the second solenoid armature (16) are additionally surrounded by a magnet device (11), by means of which the first solenoid armature (14) and the second solenoid armature (16) can be moved along the longitudinal axis (18) using precisely one solenoid (10).

A solenoid valve (10) has a U-shaped fixed iron core (50) with a driving leg (51), a supporting leg (52), and a yoke portion (53) integrally formed. One end portion of a movable iron core (60) which drives a poppet valve (41) abuts on the supporting leg (52), and the other end portion of the movable iron core (60) abuts on the driving leg (51). A sealing member (81) is disposed between and a valve housing (11) and a fixed flange (58) of a bobbin (54) attached to the fixed iron core (50). A sealing member (83) is disposed between an abutting flange (57) of the bobbin (54) and the yoke portion (53).

A control valve assembly includes a body having a first mud flow passage defining a mud flow inlet and one or more second mud flow passage portions. A magnetic plunger is slidingly mounted within the body. The magnetic plunger includes one or more third mud flow passage portions each including an inlet section and an outlet section configured to selectively align with the one or more second mud flow passage portions. A solenoid is mounted at the body. The solenoid is selectively activated to shift the magnetic plunger between a first position wherein the third mud flow passage portion is misaligned with the one or more second mudflow passage portions and a second position wherein the third mud flow passage portion aligns with the one or more second mud flow passage portions allowing a pulse of mud to flow through the mud flow passage.