Abstract: An installation device is for installing a sample separating device for separating a liquid sample in a sample separating tool. The installation device includes a first fluid connection for fluidically connecting to a first fluid connection point of the sample separating device, and an actuation device that can be actuated by a user for converting between an access position and a fluid coupling position. The access position makes the sample separating device accessible to the user, and the fluid coupling position fluidically couples the sample separating device. The installation device also includes a fluid coupling mechanism, which forms a force-loaded fluidic connection between the first fluid connection and the first fluid connection point when the sample separating device is converted into the fluid coupling position by the actuation device. The sample separating device may, for example, be configured for chromatography.

Abstract: Actuator for a valve, comprising a first piston, a first piston rod and a first fluid chamber for enabling movement of the first piston and the first piston rod. The actuator has a second piston, a second piston rod, the second piston rod being coaxially arranged with the first piston rod and radially enclosing at least a part of the first piston rod. A second fluid chamber is arranged for the second piston, for enabling movement of the second piston and the second piston rod. A first fluid channel is arranged in communication with each of the first and the second fluid chambers, for effecting, when fluid is introduced into the first fluid channel, movement of the first piston and the second piston. Also, a valve comprising such actuator is disclosed.

Abstract: A switchable valve for a sample injector includes a first valve member and a second valve member that can moved with respect to the other. The first valve member includes a plurality of ports, the second valve member includes a plurality of fluid paths. The plurality of ports include eight circumferential ports distributed along a circumference and one central port arranged at a central position of the first valve member. The plurality of fluid paths include three arcuate fluid paths so as to be couplable with at least two of the circumferential ports and one straight fluid path extending between the central position and a circumferential position so as to be couplable with the central port and one of the circumferential ports.

Abstract: Actuator for a valve, comprising a first piston, a first piston rod and a first fluid chamber for enabling movement of the first piston and the first piston rod. The actuator has a second piston, a second piston rod, the second piston rod being coaxially arranged with the first piston rod and radially enclosing at least a part of the first piston rod. A second fluid chamber is arranged for the second piston, for enabling movement of the second piston and the second piston rod. A first fluid channel is arranged in communication with each of the first and the second fluid chambers, for effecting, when fluid is introduced into the first fluid channel, movement of the first piston and the second piston. Also, a valve comprising such actuator is disclosed.

Abstract: A switchable valve for a sample injector includes a first valve member and a second valve member that can moved with respect to the other. The first valve member includes a plurality of ports, the second valve member includes a plurality of fluid paths. The plurality of ports include eight circumferential ports distributed along a circumference and one central port arranged at a central position of the first valve member. The plurality of fluid paths include three arcuate fluid paths so as to be couplable with at least two of the circumferential ports and one straight fluid path extending between the central position and a circumferential position so as to be couplable with the central port and one of the circumferential ports.