Pneumatic dosing unit and pneumatic dosing system

A pneumatic dosing system having

• a dosing unit comprising
• a multipart housing having a first housing part in which at least one pump-fluid receiving pump channel is formed, and a second housing part in which dosing-fluid receiving channels are formed,
• a cavity formed between the housing parts,
• a flexible diaphragm clamped between the first and the second housing parts and dividing 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 leading to the dosing chamber and starting from the dosing chamber, respectively,
• diaphragm valves in the feed channel and in the drain channel that are spaced apart from the pump chamber and the dosing chamber and that are controllable via control channels in the first housing part,
• the diaphragm and the diaphragm valves being arranged in such a way that dosing fluid does not contact the first housing part,
• the pneumatic dosing system further comprising at least one additional second housing part that is structurally identical to the second housing part being coupled to the first housing part, the coupled second housing part being non-destructively releasable from the first housing part.