A tap for producing and disconnecting a fluidic connection between at least two connector parts. The tap includes one connecting and disconnecting element, a manual actuating element for rotating the connecting and disconnecting element. The manual actuating element and the connecting and disconnecting element are coupled mechanically. The tap includes a main body having at least one connector part and an interior space for receiving the connecting and disconnecting element, the interior space includes a contact surface for being brought into contact with the connecting and disconnecting element.

The present invention relates to a tap (1) for producing and disconnecting a fluidic connection between at least two connector parts (2, 4). The inventive tap comprises one connecting and disconnecting element (6), a manual actuating element (10) for rotating the connecting and disconnecting element (6), wherein the manual actuating element (10) and the connecting and disconnecting element (6) are coupled mechanically, a main body (12), wherein the main body (12) comprises at least one connector part (2) and an interior space (14) for receiving the connecting and disconnecting element (6), wherein the interior space (14) comprises a contact surface (16) for being brought into contact with the connecting and disconnecting element (6), wherein the contact surface (16) is of negative configuration at least in sections with respect to the conical surface component (28) of the connecting and disconnecting element (6), wherein at least one spring element (34) is provided for form-fitting fixing the position of the connecting and disconnecting element (6) with respect to the main body and preferably the spring element (34) is additionally provided for producing a surface pressure and/or for fixing the contact faces between the contact surface (16) and the conical surface component (28) of the connecting and disconnecting element (6), wherein the spring element (34) is arranged in or on the main body (12) and the connecting and disconnecting element (6) for dismantling or assembling can be moveable against the spring element (34) in its axial extension direction.

A rotary airlock valve has a housing having an internal horizontal taper, a mating rotor within the housing, a circular groove in each end of said rotor with a compression O-ring situated therein, a pair of compression plates within the housing, each having a circular projection adapted to contact a compression O-ring in one of the circular grooves, end plates fixed to the housing by shoulder bolts situated in and extending through the end plates, the shoulder bolts being adapted to exert compressive force on the O-rings to balance the rotor within the housing. The rotor is plastic or coated metal, the plastic rotor being utilized for lower temperature applications, i.e, ambient temperature to about 600 F., and the coated metal rotors being utilized for higher temperature (about 600 to 1200 F.) applications. There are no metal to metal moving parts. The invention can be utilized by an airlock, mass measurement feeder, control valve, or on-off valve.

A valve device comprises a valve member, a housing, a first seal, and a second seal. The valve member includes a shaft portion rotatable about a rotation axis and a rotor connected to an end of the shaft portion in a first direction along the rotation axis, and, on an outer circumferential surface of the rotor there is a first flow path having a first opening. The housing includes an accommodating portion for accommodating the valve member, and a second flow path having a second opening communicable with the first opening, the accommodating portion having on its inner circumferential surface the second opening. A first seal is disposed between an outer circumferential surface of the rotor and an inner circumferential surface of the accommodating portion. The rotor includes a first region on which a coolant pressure acts in the first direction within the accommodating portion, and a second region on which the coolant pressure acts in a second direction opposite to the first direction, and a first area of the first region is below a second area of the second region.