Abstract: A valve device for controlling passage of fluid in a flow system or part thereof comprising a diaphragm valve comprising a diaphragm and a diaphragm seat, the diaphragm valve is configured for controlling the passage of the fluid by being pressable towards and away from the seat; at least one laterally movable element having part thereof engaging the diaphragm for operating the diaphragm valve; an actuator for actuating the laterally movable element; an adjustment element configured for adjustment of lateral movement span of the laterally movable element by adjusting a relative position thereof; and at least one locking mechanism for locking the adjusted relative position of the adjustment element. The lateral movement span of the laterally moveable element determines the maximal distance between the diaphragm and the seat, which determines the throughput of the valve device.

Abstract: There is provided a gasket comprising a sealing portion and a deformation stopper portion. When the gasket is placed between adjacent surfaces to be sealed of two objects, the sealing portion is engaged by the adjacent surfaces. The deformation stopper portion is engaged by the adjacent surfaces of the objects when the sealing portion has been deformed by a predetermined amount by the adjacent surfaces, thereby preventing excessive deformation of the sealing portion.