A gas valve with two nozzles includes a valve body having an inlet, a primary outlet and a secondary outlet; a rotatable valve core is disposed inside the valve body; a valve rod inserted into the valve body; a first nozzle connected to a first outlet end of the primary outlet; and a second nozzle connected to a second outlet end of the secondary outlet; wherein, a connection chamber with a top opening for receiving the valve rod is mounted on the upper portion of the valve core; a ventilation chamber in communication with the primary outlet is defined in the lower portion of the valve core, the ventilation chamber having a side wall; a first high fire hole and a low fire hole both for communication between the inlet and the primary outlet are defined on the side wall of the ventilation chamber; and a second high fire hole for communication between the inlet and the primary outlet and a supplementary fire hole for communication between the ventilation chamber and the secondary outlet are defined on the side wall of the ventilation chamber of the valve core. In this gas valve, two nozzles can be kept in a gas injection state simultaneously only by rotating a valve rod to a certain position, without keeping a hand in a pressed-down operation position all the time.

A dual fuel heating system can be used in a gas appliance. A dual fuel heating system can have a fuel selector valve for selecting between a first fuel and a second fuel different from the first. The dual fuel heating system can include a regulator unit configured to regulate the pressure of the two different fuels. The selector valve determines which flow path for which fuel is open and which is closed.

Examples are provided that describe a rotary hydraulic valve. In one example, a rotary valve comprises a sleeve with a plurality of selector ports and one or more control ports spaced along a length of the sleeve. A spool comprising an internal chamber is provided within the sleeve. The spool includes a plurality of selector openings and one or more control openings spaced along a length of the spool. The rotary valve also comprises a controller for determining a given rotational movement of the spool based on a selection of a pressurized fluid. The rotary valve also comprises a motor coupled to the spool and for rotating the spool within the sleeve based on the given rotational movement. The motor is configured to cause a given alignment of the spool to the sleeve resulting in a pathway through the internal chamber of the spool and out to the sleeve.

A valve assembly for controlling cooling fluid in a vehicle including: a valve housing having a housing body and a cover connected to the housing body, a valve body receiving space in the valve housing, which is enclosed by the housing body and the cover, a fluid line system having fluid lines, which run in different spatial regions starting from the valve body receiving space, a valve body accommodated in the valve body receiving space rotatable about an axis, the valve body tapering along the axis such that by rotating the valve body about the axis, a fluid connection situation of at least two fluid lines of the fluid line system is changeable, and a prestressing means, which applies a pressure onto the valve body along the axis in the tapering direction,
the valve body and the housing body formed as injection molded parts from thermoplastic.

A hydraulically balanced assembly is provided. The assembly includes: a valve body defining a tapered axial passageway; and a rotor having a tapered outer diameter such that the rotor has a first portion having a wider diameter and a second portion having a smaller diameter, the rotor being dimensioned to fit within the axial passageway of the valve body, the rotor further defining a rotor axial passageway having a first passageway portion and second passageway portion, the rotor further defining a first and second port, where each of the first and second ports provide fluid communication between the tapered outer diameter and the rotor axial passageway, wherein the first and second portions define openings having different cross-sectional areas where the first passageway portion is located in a first portion of the rotor and a second passageway portion is located in the second portion of the rotor and the difference in cross-sectional areas between the first passageway portion and second passageway portion and the amount of taper of the outer diameter of the rotor are related according to the Landrum relation.

A hydraulic port includes: a body defining a first passageway, the first passageway defining a first port at an outer surface of the body; a first thin member located on the body and surrounding the first port, the first thin member being configured to flex away from the first passageway when pressurized fluid flows through the first port.

A medical stopcock device comprises a housing configured to allow a flow of liquid therethrough, and a cock configured to fit in the housing and switch flow paths of the liquid flowing through the housing. The housing comprises a cylindrical body section formed with a through-hole, an upstream port section provided on an outer periphery of the body section, a downstream port section provided on the outer periphery of the body section and disposed on a side of the body section that is opposite to the upstream port section, and a side tube port section provided between the upstream port section and the downstream port section on the outer periphery of the body section and including a first communication hole, and a second communication hole having an opening area smaller than an opening area of the first communication hole. The cock comprises a cylindrical section configured to be inserted in the through-hole of the body section in a slidable manner, and including a first flow path groove and a second flow path groove, and a handle section configured to rotate the cylindrical section. When the cock is at a reference position, the upstream port section, the side tube port section, and the downstream port section communicate with each other in a manner such that the first flow path groove communicates with the upstream port section and the first communication hole in the side tube port section, and the second flow path groove communicates with the second communication hole in the side tube port section and the downstream port section.

In certain embodiments, a valve assembly can comprise a housing, a valve body and a nozzle. The housing can define a first inlet and a second inlet. The valve body can be positioned within the housing and configured to rotate between a first position for a first fuel type and a second position for a second fuel type different from the first. A control knob is operatively coupled to the valve body and to an air shutter such that rotation of the control knob controls the state of the valve body and the position of the air shutter.

A multi-way valve for a motor vehicle, having a housing, in which a lower and upper chamber are disposed one above the other along an axis of rotation and are separated from each other by a separating wall. A lower valve body is disposed in the lower chamber for rotation about the axis of rotation. An upper valve body is disposed in the upper chamber for rotation about the axis of rotation. A drive shaft drives the lower and upper valve bodies. The drive shaft is torque-transmittingly connected to one of the two valve bodies and said valve body is torque-transmittingly connected to the other of the two valve bodies. A checking device checks for a correct alignment, and, in the event of an incorrect relative alignment of the two valve bodies in the peripheral direction, a reaction to the incorrect alignment can be automatically triggered.

A valve rotatatable about an axial center includes a valve outer wall portion defining flow path portions. A housing includes a housing outer wall portion accommodating the valve and defining opening portions. A seal member is disposed between the valve outer wall portion and the housing outer wall portion. The opening portions are formed in a grid pattern in which two or more opening portions are arranged in the axial-center direction and arranged in two or more columns in the circumferential direction. The number of columns of the opening portions arranged in the circumferential direction is a number of opening columns. The number of columns of the through-holes arranged in the circumferential direction is a number of through-hole columns. The number of through-hole columns is set to be larger than the number of opening columns.