The LifeTec (P)-GSL N filter element removes contaminants such as particles, abrasion of valve, seatings and seals as well as rust. An improved steam quality ensures longer service life of the filters to be sterilised and therefore increases the efficiency of the entire process. In addition, the LifeTec (P)-GSL N filter element is a particularly efficient filtration product since the filter medium can be regenerated by ultrasonic bath or by back washing. This is especially important where there is a particularly high particle load. The pleated stainless steel filter media provides high particle or dirt holding capacity and a high flow rate at low differential pressures.