The newly developed FXL system is equipped with side-mounted linear guide bars that allow the rotor to be extracted from the housing with great ease and then later precisely re-installed without hindering access to the housing’s interior. With these individual options, both the valve interior as well as the pivotable rotor itself can be optimally cleaned, even under conditions where space is tight. The guide bars are equipped with shaft seals on both sides of each bearing to ensure hygienic sealing. Along with optimized handling for cleaning, the system demonstrates low wear as well as long operational life and corresponding cost savings. The linear system can be retrofitted on existing rotary valves.