An intermediate piece for a stop valve, in particular a membrane valve, for fluids including a pressure piece. The pressure piece has at least two locking slides for locking a locking member of a closure element. The intermediate piece includes a cylinder in which the pressure piece can be guided in axial manner. The intermediate piece has a recess, which is arranged in such a way that in mounting position of the pressure piece the locking slide can be shifted into the recess, thus releasing the locking member.

An intermediate piece for a stop valve, in particular a membrane valve, for fluids including a pressure piece. The pressure piece has at least two locking slides for locking a locking member of a closure element. The intermediate piece includes a cylinder in which the pressure piece can be guided in axial manner. The intermediate piece has a recess, which is arranged in such a way that in mounting position of the pressure piece the locking slide can be shifted into the recess, thus releasing the locking member.

There is provided a shut-off valve including: a valve body part having a valve body surface; a valve seat part provided around an inlet, and having a valve seat surface disposed at a position opposite to the valve body surface; and a moving mechanism that is connected to the valve body part, and moves the valve body part in a direction of an axis to switch to either a shut-off state or a circulation state, wherein the valve seat part has an endless inner peripheral side projection and an endless outer peripheral side projection that project from the valve seat surface toward the valve body surface along the axis, and the valve body part has a diaphragm forming the valve body surface, and an elastic member disposed on a back surface of the diaphragm.

There is provided a shut-off valve including: a valve body part having a valve body surface; a valve seat part provided around an inlet, and having a valve seat surface disposed at a position opposite to the valve body surface; and a moving mechanism that is connected to the valve body part, and moves the valve body part in a direction of an axis to switch to either a shut-off state or a circulation state, wherein the valve seat part has an endless inner peripheral side projection and an endless outer peripheral side projection that project from the valve seat surface toward the valve body surface along the axis, and the valve body part has a diaphragm forming the valve body surface, and an elastic member disposed on a back surface of the diaphragm.

A solenoid valve has a valve member (43) which is operated between: a closed position in which the valve member abuts on a valve seat to block communication between ports (32 and 33); and an open position in which the valve member separates from the valve seat to enable communication between the ports (32 and 33). A fixed iron core (18) and a movable iron core (21), in which the movable iron core reciprocatively moves in axial directions, are disposed in a bobbin (13) of a solenoid (11). In a valve housing (12) provided with ports (31 to 33), a swing member (41) having a valve element is swingably attached, and a pivotal lever (51) is pivotally attached. The pivotal lever (51) is provided with: an actuating portion (53) abutting on one end of the swing member (41); and an effort portion (54) abutting on the tip end of the movable iron core (21), an opening/closing stroke of the valve member (43) is made larger than the moving stroke of the movable iron core (21).

A piezoelectric element-driven valve includes a body provided with a fluid channel and a valve seat, a valve element which opens and closes the fluid channel by being in contact with and separated from the valve seat of the body, and piezoelectric actuators which drive the valve element to open and close by means of the extension of the piezoelectric element. In the piezoelectric element-driven valve, at least two piezoelectric actuators are arranged on a straight line via a spacer which allows pulling out of wiring.

A piezoelectric element-driven valve includes a body provided with a fluid channel and a valve seat, a valve element which opens and closes the fluid channel by being in contact with and separated from the valve seat of the body, and piezoelectric actuators which drive the valve element to open and close by means of the extension of the piezoelectric element. In the piezoelectric element-driven valve, at least two piezoelectric actuators are arranged on a straight line via a spacer which allows pulling out of wiring.

A back-pressure control valve includes a main body having an inner space, a valve element that is arranged in the inner space of the main body and has an opposing surface opposite to one surface of the inner space, a driver that moves the valve element such that a distance between the opposing surface of the valve element and the one surface in the inner space changes; and a resin coating formed on one of the one surface in the inner space and the opposing surface of the valve element, wherein the main body has a first flow path that guides a fluid to a pressure control space formed between another surface out of the one surface and the opposing surface of the valve element, and the resin coating, and a second flow path that discharges a fluid from the pressure control space.

A tracheostoma valve to be applied to a tracheostomized person's neck comprises an air passage to be connected with the tracheostoma for connecting the trachea with the surroundings. A valve member is provided in the air passage, wherein the valve member is normally open and allows for inhalation and exhalation through the air passage. The valve further comprises a manually activated member for establishing an uninterrupted seal to block patient exhalation, thereby to direct it to the patient's pharynx, esophagus, sinuses, and mouth for speech following surgical removal of the larynx

A tracheostoma valve to be applied to a tracheostomized person's neck comprises an air passage to be connected with the tracheostoma for connecting the trachea with the surroundings. A valve member is provided in the air passage, wherein the valve member is normally open and allows for inhalation and exhalation through the air passage. The valve further comprises a manually activated member for establishing an uninterrupted seal to block patient exhalation, thereby to direct it to the patient's pharynx, esophagus, sinuses, and mouth for speech following surgical removal of the larynx