Wet filter cartridges
Wet the seal material with water or the filtrate before installing. Then install the filter cartridge carefully without damage, fully wet the filter cartridge before use. Open the vent valve during filling, fill the cartridge housing with de-ionized water or the filtrate until liquid flows out of vent valve, close the vent valve. Rinse at a differential pressure of 0.3 bar for about 3-5 minutes. After rinsing, open the vent and the run-off drain valve, drain the cartridge housing. This can also be done with compressed air or nitrogen at a max. inlet pressure of 0.5 bar with the vent closed. The cartridge is properly wetted once you have carried out the rinsing procedure as described above.
The filter cartridge needs to be rinsed as the way of wetting before sterilization. There are 3 kinds of sterilization which are autoclaving, in-line steam sterilization and sterilization with hot water.
Autoclaving sterilization temperature up to 121℃, autoclave the filter cartridge for 30 minutes at least after the sterilization temperature has been reached.
In-line Steam Sterilization, saturated steam up to 121℃. Open the vent valve, run-off valve and, if appropriate, the check valve. Let the steam flow in slowly and monitor that the differential pressure of 0.5bar is not exceeded during the pressurization phase.（The differential pressure between the inlet and outlet sides should not exceed 0.5bar. This will ensure the longest service life possible.）Close almost all valves as soon as steam escapes from them. Set the desired sterilization steam pressure at the filter outlet through the different valves. Steam sterilize the filter cartridge (once the sterilization temperature has been reached at the outlet) for 30 minutes under at the most constant pressure & temperature conditions possible. After completing the sterilization cycle, turn off the steam supply. Wait until no more steam escapes from the outlet and the inlet and outlet pressures have dropped to atmospheric, close the valves on the sterile side. （During the cooling phase, avoid a vacuum condensation as follows: after steam sterilization, cold-blow the filter system. For this purpose, use a supporting gas pressure-compressed air, carbon dioxide or nitrogen. The pressure must be 200mbar higher than the steam pressure applied during sterilization）
Sanitization with hot water, (Food & Beverage Application) In selected applications, sanitization can be carried out by circulating hot water through the system. Make sure that the housings are filled completely. During filling, leave the vent valve open. The sanitization time takes 30 minutes after the water at the outlet has reached a minimum of 85℃. After completing sterilization, turn off the hot water supply. （During the cooling phase, avoid a vacuum condensation as follows: after steam sterilization, cold-blow the filter system. For this purpose, use a supporting gas pressure-compressed air, carbon dioxide or nitrogen. The pressure must be 200mbar higher than the steam pressure applied during sterilization）