To provide a manual valve device suitable for a miniaturized and integrated fluid control system, the manual valve device includes a casing having a tubular shape and incorporating a drive mechanism, an operation member for activating the drive mechanism, and a cam part that converts a force acting on the operation member into a driving force of the drive mechanism. The manual valve device further includes a protective cover provided on an upper end side of the casing and covering at least a portion of the operation member. The operation member includes an attaching part that allows removable attaching of an auxiliary tool for causing a force required for activation of the drive mechanism to act on the operation member. The protective cover is formed so as to allow access to the attaching part of the operation member by the auxiliary tool.

A diaphragm valve includes a valve seat (52) disposed in a valve chamber in a body (50), an annular groove (53) provided on the outer periphery of the valve seat, a diaphragm (55) provided so as to be able to make contact with and leave the valve seat via a pressurizing device, and a primary-side flow path (56) communicating the valve chamber, in which an inner diameter (R) of a secondary-side flow path (57) contiguously provided to the annular groove is 2.0 to 4.5 times a groove width of the annular groove, and an intersection cross-sectional area (S) between the annular groove and the secondary-side flow path is smaller than a cross-sectional area (T) of the secondary-side flow path and the intersection cross-sectional area is configured to be equal to or larger than 35% with respect to a sectional area of the secondary-side flow path to acquire a predetermined Cv value.

Flow through a sleeve is controlled with a housing. A removable frame is positioned within the housing. A removable, tubular rotational mechanism defines a hole for receiving the sleeve therein. A pair of arms are pivotally mounted on the rotational mechanism for squeezing the sleeve. An actuator drives the rotational mechanism to pivot the pair of arms to open and to close the sleeve.

The present invention is a flow-rate adjustable valve for adjusting a flow rate of liquid flowing through a flow path. The flow-rate adjustable valve includes: a main valve body movably supported in the flow path via a diaphragm membrane; a back pressure chamber; a plurality of inlet holes communicating the upstream side of the flow path with the back pressure chamber; an outlet hole communicating a downstream side of the flow path with the back pressure chamber; and a pilot valve body for opening and closing the outlet hole, wherein moments acting on the main valve body based on the liquid flowing into the back pressure chamber through the plurality of inlet holes are canceled by each other in total, under a condition in which the pilot valve body opens the outlet hole.

Flow through a sleeve is controlled with a housing. A removable frame is positioned within the housing. A removable, tubular rotational mechanism defines a hole for receiving the sleeve therein. A pair of arms are pivotally mounted on the rotational mechanism for squeezing the sleeve. An actuator drives the rotational mechanism to pivot the pair of arms to open and to close the sleeve.

A flow regulating switch valve includes a valve core that includes a switch assembly configured to drive a diaphragm assembly to open or close a water outlet, and also includes a flow regulating assembly that comprises a rotating ring, a sliding block, and a magnet. A control key is configured to control the switch assembly. The rotating ring is connected to the control key and includes an inclined plane that transitions from high to low and is configured to drive the sliding block to slide up and down such that the sliding block drives the magnet to move up and down. The magnet is configured to control the diaphragm assembly to regulate a size of the water outlet.

A valve assembly including a valve housing and a handle that is movable about an actuation axis to actuate a valve actuator within the valve housing between an open position and a closed position. The handle has a first opening and the valve housing has a second opening. When the valve actuator is in the closed position the first opening aligns with the second opening to enable receipt of a lockout member that prevents movement of the valve actuator from the closed position to the open position.

A pilot valve includes a housing, a motor secured in the housing and including a rotating output shaft, and a rocker disposed in the housing and coupled with the motor via a cam mechanism. The rocker is pivotable between a CLOSED position and an OPEN position by operation of the motor. The rocker includes a left-side boss and a right-side boss that are positioned in a path of the cam mechanism, where the left- and right-side bosses serve as cam stops in the CLOSED and OPEN positions, respectively. The housing may include features to better secure the motor, and the assembly may be configured to prevent unintended changes of state during periods of nonuse.

Provided is a valve actuator in a simple structure and easily downsizable, having reliable valve openability and closability even under high pressure, and also capable of exerting high durability even with a high frequency of valve opening and closing, and a diaphragm valve including this valve actuator. In the valve actuator, a repulsive member provided in an actuator main body, a piston pressed by this repulsive member, and at least two air chambers for moving the piston by an air pressure are arranged and a booster mechanism for exerting a force amplified in a valve-closing direction is accommodated in any of the air chambers.

A sanitary valve having a main valve with a diaphragm movable between closed and open positions. The main valve is in an inner housing rotatably mounted in an outer housing. The inner housing has a first valve opening connected to a first valve opening in the outer housing to form a valve outlet. The inner housing has a second valve opening arranged on the outside relative to the valve outlet and is paired with a second valve opening in the outer housing forming a valve inlet. Paired second valve openings are brought into congruence by a relative twisting of the inner and outer housings with the valve inlet being variable. The inner housing has a pot-base inside from which a valve connector protrudes which connects the inner part first valve opening forming the valve outlet to the valve seat formed by the free sleeve end region of the valve connector.