Abstract: A nipple (1) is connectable or connected to a system (2) of pressurizable fluid (16). The first rapid-coupling part operates with a dual function in which, in a first function, the first rapid-coupling part can be coupled together with a second rapid-coupling part and in the coupling position of the parts fluid can be drained off to a first apparatus receiving the drained-off fluid and, in a second function, the first rapid-coupling part receives a probe-shaped unit, which is insertable in the first rapid-coupling part, for draining off the fluid to a quality-detecting apparatus or container apparatus; connected to the probe-shaped unit.

Abstract: A quick coupling includes a frame and a valve body which is arranged to be longitudinally displaceable in the frame. An inner sleeve is arranged in the frame to be displaceable relative to both the frame and the valve body. The valve body is centered in the frame with the aid of the bearing unit projecting inwards from the sleeve. The bearing unit is provided with one or more cavities or holes allowing working media to flow through. A rear seal is provided in a seat arranged behind the inner sleeve. A pressure eliminator is also provided behind the inner sleeve.

Abstract: A first quick-coupling part can be brought into interaction with a second quick-coupling part via an interaction portion. The quick-coupling parts are held together with locking members. The interaction portion is designed with a surface layer which brings about an essentially crack-free flexibility for the locking members in spite of high actuating forces. One or more underlying layer(s) has (have) greater hardness than the surface layer, and the combination of said layers gives the necessary resistance against high media pressure.

Abstract: A quick coupling component including at least one valve member. A pressure reduction channel is provided in at least one valve member. A pressure reduction member is arranged in the pressure reduction channel. The pressure reduction member includes a shut-off element arranged in the pressure reduction channel. A seat includes a seat surface, wherein in a closed position a first portion of the shut-off element surface bears against the seat surface. The seat surface substantially corresponds to the shut-off element first surface portion. The seat surface includes a degree of fineness substantially corresponding to a degree of fineness of the shut-off element. At least one of the seat and the shut-off element is formed of a material having a hardness substantially exceeded by a hardness of another of the seat and the shut-off element.

Abstract: A coupling part constituting the male or female part in a quick coupling comprises an inner, longitudinally displaceable unit positioned in an outer part of the coupling part the inner unit being adapted in a deactivated position thereof to confine the media pressure in a first chamber arranged in the outer part of the coupling part and in an actuated position to open or keep open an access for media to a second chamber in the outer part. Pressure-reducing members actuable upon coupling together of the male and female parts and allowing for the coupling even at high media pressures, and including a lead-off channel for media pressure and a shut-off element positioned in the channel, and actuable by the end face of the other coupling part through an actuation member. The actuation member is sealed-off or positioned in the coupling part in order to prevent lead-off media from reaching the end face of the coupling part.