Abstract: A pneumatic dosing unit includes a housing having a first housing part for a pump-fluid receiving pump channel and a second housing part for dosing-fluid receiving channels. A cavity is formed between the housing parts. A flexible diaphragm is clamped between the housing parts and divides the cavity into a pump chamber and a dosing chamber that are fluidically separated from each other. At least one feed channel and at least one drain channel in the second housing part lead to the dosing chamber and start from the dosing chamber, respectively. Diaphragm valves in the feed channel and in the drain channel are spaced apart from the pump chamber and the dosing chamber and are controllable via control channels in the first housing part. The diaphragm and the diaphragm valves are arranged in such a way that dosing fluid does not come into contact with the first housing part.

Abstract: A pneumatic dosing unit includes a housing having a first housing part for a pump-fluid receiving pump channel and a second housing part for dosing-fluid receiving channels. A cavity is formed between the housing parts. A flexible diaphragm is clamped between the housing parts and divides the cavity into a pump chamber and a dosing chamber that are fluidically separated from each other. At least one feed channel and at least one drain channel in the second housing part lead to the dosing chamber and start from the dosing chamber, respectively. Diaphragm valves in the feed channel and in the drain channel are spaced apart from the pump chamber and the dosing chamber and are controllable via control channels in the first housing part. The diaphragm and the diaphragm valves are arranged in such a way that dosing fluid does not come into contact with the first housing part.

Abstract: A modular valve system includes a number of functional components such as valves, pressure regulators, adaptors and manifolds for controlling a fluid flow through said valve system, and at least two connecting blocks of different configurations, each associated to one of said functional components. Each one of said connecting blocks constitutes a functional unit together with one functional component mounted on a functional side of said connecting block. All connecting blocks are formed in a rectangular block shape and have an inlet and an outlet on two opposing end sides constituting an inlet side and an outlet side, respectively. The inlet sides of all connecting blocks are of identical configuration. The outlet sides of all connecting blocks are also of identical configuration, wherein outlet and inlet of neighboring, coupled connecting blocks are aligned with each other. Therefore, functional units can be directly coupled for establishing a fluid flow.