A valve device includes a housing, a stationary disk, a drive device, a shaft and a rotor. The stationary disk is fixed at an inside of the housing and has at least one flow passage hole. The shaft is rotated about a central axis by the drive device. The rotor increases or decreases an opening degree of the at least one flow passage hole. The rotor includes: a drive disk that slides relative to the stationary disk; and a lever that is fixed to the drive disk and couples between the drive disk and the shaft. A first torsion spring is placed between the housing and the shaft and urges the shaft relative to the housing in a circumferential direction around the central axis, and a second torsion spring is placed between the shaft and the lever and urges the lever relative to the shaft in the circumferential direction.

A linear displacement device includes at least one artificial muscle actuator, an arm attached to the at least one artificial muscle, a body that is restricted to move along a line, and a stationary channel that restricts the motion of the body to linear motion. The at least one artificial muscle actuator causes the body to move along the line. The body is further restricted to move along a surface of the arm and the at least one artificial muscle actuator is a rotational muscle actuator. Additionally, the arm rotates in concert with the at least one artificial muscle actuator.

A linear displacement device includes at least one artificial muscle actuator, an arm attached to the at least one artificial muscle, a body that is restricted to move along a line, and a stationary channel that restricts the motion of the body to linear motion. The at least one artificial muscle actuator causes the body to move along the line. The body is further restricted to move along a surface of the arm and the at least one artificial muscle actuator is a rotational muscle actuator. Additionally, the arm rotates in concert with the at least one artificial muscle actuator.

A gate valve device includes a cleaning component, a first lifting component, and a second lifting component. The cleaning component is arranged on the second lifting component. The first lifting component is configured to control whether an opening on a side of a vacuum chamber close to a swing gate valve is in a closed state. The second lifting component is configured to, in a case that the opening on the side of the vacuum chamber close to the swing gate valve is in the closed state, control the cleaning component to clean the swing gate valve.

A gate valve device includes a cleaning component, a first lifting component, and a second lifting component. The cleaning component is arranged on the second lifting component. The first lifting component is configured to control whether an opening on a side of a vacuum chamber close to a swing gate valve is in a closed state. The second lifting component is configured to, in a case that the opening on the side of the vacuum chamber close to the swing gate valve is in the closed state, control the cleaning component to clean the swing gate valve.

A loose type pneumatic valve and a loose type pneumatic valve module, the loose type pneumatic valve including a valve body including a pneumatic passage therein; a valve head on the valve body, the valve head being coupleable with an actuator; a stem on the valve head, the stem being configured to open and close the pneumatic passage; and at least one alignment socket on the valve head, the at least one alignment socket being configured to align the valve head with the actuator.

A loose type pneumatic valve and a loose type pneumatic valve module, the loose type pneumatic valve including a valve body including a pneumatic passage therein; a valve head on the valve body, the valve head being coupleable with an actuator; a stem on the valve head, the stem being configured to open and close the pneumatic passage; and at least one alignment socket on the valve head, the at least one alignment socket being configured to align the valve head with the actuator.

A shaft-bearing bush assembly for a valve arrangement for an air-conditioning system is disclosed. The shaft-bearing bush assembly includes a shaft drive-connectable to a valve of the valve arrangement and a bearing bush, in which the shaft is rotatably received relative to the bearing bush between a first rotary position and a second rotary position about an axis of rotation extending along the axial direction. A bush projection is non-rotatably arranged on the bearing bush relative to the bearing bush and a shaft projection is non-rotatably arranged on the shaft relative to the shaft. The bush projection and the shaft projection are matched to one another such that the bush projection provides a rotary stop for the shaft projection for limiting the rotary movement of the shaft between the first rotary position and the second rotary position.

A shaft-bearing bush assembly for a valve arrangement for an air-conditioning system is disclosed. The shaft-bearing bush assembly includes a shaft drive-connectable to a valve of the valve arrangement and a bearing bush, in which the shaft is rotatably received relative to the bearing bush between a first rotary position and a second rotary position about an axis of rotation extending along the axial direction. A bush projection is non-rotatably arranged on the bearing bush relative to the bearing bush and a shaft projection is non-rotatably arranged on the shaft relative to the shaft. The bush projection and the shaft projection are matched to one another such that the bush projection provides a rotary stop for the shaft projection for limiting the rotary movement of the shaft between the first rotary position and the second rotary position.

An intake valve and a drain system are located in the lower portion of a stanchion or outer pipe which is preferably dimensioned so that these structures can be located below the frost line underground so as not to be subject to freezing. The intake valve structure includes a body which fits tightly within the stanchion and which has a central bore which receives, at its uppermost end, the lower end of the conduit. The lower end of the bore is fitted with threads or other convenient means for connecting a conduit representing a source of water which is under sufficient pressure to allow the water to rise in the stanchion conduit and fill the basin. The improvements to the prior art include a stand or stabilizing means to secure the city water vertical outlet port at least about four to six inches above the bottom of the outer pipe. This facilitates removal of the intake valve structure from the city water outlet port. Other improvements include a reinforced pivot axis on the flapper, training and raised flappers, and ribs inside the bowl to assist unscrewing the intake valve structure.