A valve assembly comprising a chamber, the chamber having an inlet which is adapted to be connected to a source of relatively high pressure fluid, and an outlet which is adapted to be connected to a source of relatively low pressure fluid, and a switch valve which is switchable between a first configuration in which the valve closes the outlet and opens the inlet, and a second configuration in which the valve closes the inlet and opens the outlet, characterised in that a flow control device is provided between the outlet and the volume of relatively low pressure fluid, the flow control device including a restrictor portion which restricts flow of fluid through the flow control device, the extent to which fluid flow is restricted decreasing as the fluid pressure in the chamber increases.

The sanitary mixer valve has an adjustable control disc (2) for a fixed valve seat disc (1) which has water passage openings. A central passage (12) is provided in the valve seat disc and an overflow passage (20) is formed in the control disc and selectively brought to overlap with through-passages constructed in circular ring cut-out form. The through-passages (10,11) which are allocated for the feed of hot and cold water are each separated by a land (13), whereby both lands are positioned so that in a center mixing position with a fully open throughflow one side wall (21) of the overflow passage is in contact with a first side wall (130) of the two lands.

The present invention concerns a means for controlling and/or measuring the flow of a running fluid, wherein the throttling of the flow is controlled utilizing the fluid's own differential pressure arising from the flow. The valve comprises a cover provided with a flow aperture, a main valve disc and control means consisting of a cylinder volume/piston assembly, the movement of said piston being connected to the main valve disc, and wherein the cylinder volume has been connected by a first opening (d1 min ) to the high pressure side and by a second opening (d2 min ) to the low pressure side so that the ratio of the areas of the openings is adjustable. The means comprises at least one sensing member by the aid of which the position of a part of the cylinder volume/piston assembly moving axially in the direction of the flow is measured; a data processing unit, to which the signal from the sensing member is conveyed after appropriate processing; a memory unit, in the first part of which have been stored data concerning the characteristic curve of the valve or equivalent, from which based on the signal from said sensing element, with the aid of the data processing unit, the variations of volumetric flow and or pressure can be calculated, and in the second part of said memory unit being stored the desired values of the volumetric flow and/or pressure, with which the calculated values mentioned before are compared; and at least one actuator by the aid of which the ratio of areas of the openings (d1 min , d2 min ) is adjustable for realizing the desired volumetric flow and/or pressure.

An airless dispensing pump for liquid products including a push button with a spray nozzle which communicates with a network of channels that is provided locally on the wall of an internal truncated-cone-shaped bore, and a housing. An upper part of the housing includes a dosing cell having an elastically-deformable wall, which is equipped with an intake valve and topped with a rigid collar for fixing same inside the bore of the aforementioned button. Moreover, the outer periphery of the collar has an inclined face which defines a swirl chamber opposite the above-mentioned network, while the inner periphery thereof is quipped with a passage to the chamber.

The residual pressure valve comprises a rubber tube (2) which acts as a valve seat and holds the gas control component (1) under tension. The control component has chambers (1H1, 1H2) at each end which are connected by vertical channels (K1A, K1B, K2A, K2B) to control chambers (SA, SB) on its lower side. These are separated by a radial partition (ZW).

A flexible pipe formed by multiple layers of different materials, and one or more vent passages are provided in one of the layers for venting any gases permeating through the pipe.

Device for producing a sterile foam out of a liquid, in particular, a hardening agent comprises a filter system integrated into the gas and/or liquid supply lines.