A valve for preventing water hammer includes a speed reduction device for reducing a speed at which the valve may be closed. A method of preventing water hammer includes closing a valve at a fire hydrant after extracting water from the fire hydrant, in which the valve comprising a speed reduction device that increases an amount of time needed for closing the valve, and operating the valve to close the valve comprises operating the speed reduction device.

A humanized switching device includes a tee pipe and a switching lever. The tee pipe has a switching chamber therein. The switching chamber is formed with a water inlet and a plurality of water outlets. The switching lever is provided with a water-stop part. The switching lever is movable to change the position of the water-stop part between the water inlet and the water outlets to realize the switching of the water passage.

A locking mechanism for a valve handle has a slider arranged to slide back and forth in a slot in the valve handle, between a lock position, in which the slider engages with a stop on the valve body and an unlock position, in which the slider does not engage with a stop. The slider is formed in two parts, which are inserted from opposite sides of the slot and snap fit together. The slider has indicia to indicate whether the slider is in the lock or unlock position, and the slider is arranged so as to cover the fastener which attaches the valve handle to the valve body.

The invention relates to a valve comprising a valve housing (1) and a manually actuatable valve part (5) which is arranged therein in a longitudinally displaceable manner, said valve part controlling the free passage cross-section for fluid between the two connection points (10, 17) in the valve housing at given adjustment positions. The valve is characterized in that a latching device (55, 57) is provided between the valve housing and the valve part, which lets the valve part assume its respective adjustment position only in stages and in a releasable manner.

A valve for preventing water hammer includes a speed reduction device for reducing a speed at which the valve may be closed. A method of preventing water hammer includes closing a valve at a fire hydrant after extracting water from the fire hydrant, in which the valve comprising a speed reduction device that increases an amount of time needed for closing the valve, and operating the valve to close the valve comprises operating the speed reduction device.

A valve for preventing water hammer includes a speed reduction device for reducing a speed at which the valve may be closed. A method of preventing water hammer includes closing a valve at a fire hydrant after extracting water from the fire hydrant, in which the valve comprising a speed reduction device that increases an amount of time needed for closing the valve, and operating the valve to close the valve comprises operating the speed reduction device.

An adjusting device for adjusting the flow rate of a medicinal fluid-conveying system, said device having a selection wheel for selecting one of a number of possible flow rates, having an adjusting disc connected to said selection wheel for adjusting the selected flow rate, and having a catching nose that cooperates with the outer edge of the adjusting disc, is improved in that the adjusting disc has a star shape.

An adjusting device for adjusting the flow rate of a medicinal fluid-conveying system, said device having a selection wheel for selecting one of a number of possible flow rates, having an adjusting disc connected to said selection wheel for adjusting the selected flow rate, and having a catching nose that cooperates with the outer edge of the adjusting disc, is improved in that the adjusting disc has a star shape.

A cartridge provided with ECO function for a single-armed mixing faucet, that comprises a cylindrical housing that has a cylindrical inner cavity and wall with a central axis; an arm that can be moved, and an actuator disc connected to the control ceramic disc of a pair of water-mixing ceramic discs, wherein the actuator disc comprises a pair of parallel planar walls extending in radial direction, wherein the spacing between the parallel walls decreases at predetermined distances from the center of rotation of the actuator disc, the cartridge comprises an arced limiting element that has a pair of spaced arms, the limiting element being movable only in radial direction relative to the actuator disc, and the radial position of the limiting element, and the limiting element being movable substantially without any effort.

A cartridge provided with ECO function for a single-armed mixing faucet, that comprises a cylindrical housing that has a cylindrical inner cavity and wall with a central axis; an arm that can be moved, and an actuator disc connected to the control ceramic disc of a pair of water-mixing ceramic discs, wherein the actuator disc comprises a pair of parallel planar walls extending in radial direction, wherein the spacing between the parallel walls decreases at predetermined distances from the center of rotation of the actuator disc, the cartridge comprises an arced limiting element that has a pair of spaced arms, the limiting element being movable only in radial direction relative to the actuator disc, and the radial position of the limiting element, and the limiting element being movable substantially without any effort.