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 hydraulic device has rotatable hydraulic means such as a valve actuator or a peristaltic pump, an electric motor as a drive unit, and a gear unit between the drive unit and the hydraulic means, wherein the hydraulic means has at least two water-using ports. In accordance with the invention, the drive unit, the hydraulic means and the gear unit are designed as single function units and are detachably connected to one another as a complete function unit in the form of the hydraulic device. The detachable connection is advantageously achieved by means of screws.

A rotary valve for enhancing aerodynamic stability, including a stator, a rotor, a valve core, a rotating assembly and an elastic pressing assembly. An outer wall of the valve core is provided with at least two curved gas grooves uniformly distributed along a circumferential direction of the valve core. The valve core is fixed to an outer wall of the rotor. The stator is provided with a chamber in an inverted truncated-cone shape. The rotor is coaxially provided within the chamber. The stator is provided with a plurality of gas holes uniformly distributed along a circumferential direction of the stator. A diameter of the gas hole is defined as D. A distance between a first side wall and a second side wall of the gas groove is defined as L. A ratio of L to D is 0.8-1.2.

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.

A fluid control valve includes a valve and a housing. A plurality of opening portions include fluid inlets and a plurality of fluid outlets. A plurality of flow path portions include a first flow path portion that guides fluid flowing in from one fluid inlet to one fluid outlet, a second flow path portion that divides fluid flowing in from one fluid inlet and guides the divided fluid to two or more fluid outlets, and a third flow path portion that merges fluid flowing in from two or more fluid inlets and guides the merged fluid to one fluid outlet. The plurality of flow path portions further includes a fourth flow path portion that merges fluid flowing in from two or more fluid inlets, divides the merged fluid, and guides the divided fluid to two or more fluid outlets.

A fluid control valve includes a valve and a housing. A plurality of opening portions include fluid inlets and a plurality of fluid outlets. A plurality of flow path portions include a first flow path portion that guides fluid flowing in from one fluid inlet to one fluid outlet, a second flow path portion that divides fluid flowing in from one fluid inlet and guides the divided fluid to two or more fluid outlets, and a third flow path portion that merges fluid flowing in from two or more fluid inlets and guides the merged fluid to one fluid outlet. The plurality of flow path portions further includes a fourth flow path portion that merges fluid flowing in from two or more fluid inlets, divides the merged fluid, and guides the divided fluid to two or more fluid outlets.

A housing rotatably accommodates a valve and includes a port that passes through an outer wall and an inner wall. A seal member is provided between the inner wall and the valve and includes a surface on the housing side that is in contact with a port periphery of the inner wall of the housing, and a surface on the valve side that is in sliding contact with the side wall of the valve. The biasing member biases the valve toward the apex of the conical shape and, during both the rotation and stop of the valve, keeps a state in which the side wall of the valve and the seal member are in sliding contact with each other, and keeps a state in which the inner wall of the housing and the seal member are in contact with each other.

A valve assembly for select distributed discharge of received fluid in a predetermined manner is generally provided. The assembly includes a manifold and a rotatable valve body. The manifold has an internal chamber, a fluid ingress passage for receipt of fluid, and a plurality of fluid discharge conduits. The fluid ingress passage and fluid discharge conduits are in fluid communication with the internal chamber. A first internal chamber section is characterized by the fluid ingress passage with a second internal chamber section characterized by ingress portions of the fluid discharge conduits. The valve body is adapted to be sealingly seated within the internal chamber so as to fluidly isolate the internal chamber sections, and includes a bore axially extending inwardly from a first end thereof for receipt of fluid from the fluid ingress port of the manifold, and a fluid egress passage in fluid communication with the bore for passage of received fluid to a select fluid discharge conduit of the fluid discharge conduits.

A cartridge valve intended to be mounted in a suitable housing arranged in a receiving frame includes a chassis, a plug rotatably mounted on the chassis and comprising: a main body provided with fluid passages opening into an outer axial wall of the main body via at least two outlet ports, and a drive shaft capable of being coupled to an actuator to control the rotation of the plug, a peripheral axial wall assembly which is integral with the chassis, the peripheral axial wall assembly being provided with a plurality of radial openings intended to be aligned inwardly with outlet ports of the plug, in determined angular positions of the plug, and outwardly with associated ducts of the receiving frame.