ScottCart Premembrane PP and Sartorius Sartopure IND

ScottCart Cartridge


1. Preparation (before first use) 1.1 Cold water flushing Direction: In direction of flow
Volume: At least 7 gal/10”
Flow: 145 gal/m2/hour or 88gal/hr/10” segment
Temperature: < 68°F
Pressure: 22 psi
  • Water quality as recommended or use RO-Water
  • Keep vent valves slightly open while flushing
  • Adjust the outlet valve to obtain the system pressure at >1.5 bar (21.7psi)
  • Max 72.5 dpsi (in filtration direction)
  • Flushing time 3-5 minutes
  • If pressure can’t be reached, bring backpressure up to 3 psi for a few seconds while circulating water, while venting housing to release trapped air. Repeat 2-3 times.
2. Sterilization 2.2 Hot water flushing Direction: In direction of filtration
Volume: 3 gal/10” cartridge
Flow: 1265 gal/m2/hour
Temperature: 140F-149F
  • See 1.1
  • But max 29 dpsi
  • Flushing 2-3 minutes
Sterilization: Hot water In direction of filtration 30 minutes recirculation
Flow: 158-172 gal/m2/hour
Temperature: 185°F-194°F
  • See 1.1
  • But max 7 dpsi
  • If temperature at least 185°F, recirculate 30 minutes.
Sterilization: Steam In direction of filtration 30 min.
Valves slightly open.
Temperature: 249°F
  • Max 4 dpsi
Cold water flushing (Cooling) In direction of filtration.
Volume: 26 gallons/30” cartridge
Flow: 158-172 gal/m2/hour
Temperature: < 68°F
  • See 1.1
  • At 7 dpsi
3. Filtration Fill housing
Open the inlet valve
Fill the housing with water/beverage with outlet valve closed and vent valve open.
When product reaches vent valve, open outlet valve and close vent valve.
  • Make sure the housing is full
Direction: In the direction of filtration
  • The lower the operating dpsi, the longer the cartridge lifespan over time. Start no higher than 5-7 dpsi
  • Do backflush and forward flow regeneration procedure before reaching 14.5 psi for maximum throughput/longevity.
  • Max 72.5 dpsi
  • Yeast and bacteria are “squishy” and can get pushed through before max dpsi
Drain housing
Emptying the water/beverage upstream line and the filter housing with air, water or nitrogen. Open all valves for draining through gravity.
4. Backflush 4.1 Cold water flushing See 1.1 See 1.1
4.2 Cold water flushing Against direction of filtration
Flow: Up to 21 psi at 68°F for 2-5 minutes.
  • 2-5 minutes
  • Don’t exceed 29 psi pressure on inlet (which is normally the outlet)
4.3 Warm water flushing Only in direction of filtration
See 2.2
See 2.2
5. Caustic Regeneration 5.1 Cold Water flushing See 1.1 See 1.1
5.2 Chemical Regeneration In direction of filtration 30 min recirculation
Flow of 158-171 gal/m2/h
Volume: 10gal/30” cartridge
Temperature: 140°F-149°F 2% NaOH or KOH or
104°F – 140°F with Aird Destainex-LF
  • Max 29 dpsi
  • If conductivity and temperature OK 30 min circulation
  • Make sure housing is filled
  • Take precautions for handling chemicals
5.2 Cold water flushing See 1.1
  • See 1.1
  • Flush until conductivity is OK
5.3 Neutralizing with cold water and acid (as an alternative to 5.2) In direction of filtration 30 min recirculation
Flow of 158-171 gal/m2/h
Up to 1% citric, nitric or phosphoric acid
  • See 1.1
  • Make sure housing is full
6. Hot Water Regeneration 6.1 Cold Water Flushing See 1.1
  • See 1.1
6.2 Warm Water Regeneration In direction of filtration 15 min recirculation
Flow of 88 gal/10”/h
Volume: 3gal/10” cartridge
Temperature: 100°F-140°F
  • See 1.1
  • But max 7 dpsi

Temperature ΔP in direction of filtration ΔP in reverse direction (only prefilters, never membranes)
68°F 72.5 psi 29 psi
176°F 29 psi 7 psi
>158°F <203°F 7 psi 4 psi
Steam >249°F 4 psi 4 psi


  1. The flushing and sterilization water has to be free of particles. It is recommended to use partly softened or RO water with conductivity of <500µS/cm2 .
  2. The quality of water used can influence the result of chemical regeneration steps. Hard water in combination with caustic solutions or some cleaning agents can result in precipitation and block the membrane.
  3. Since water temperatures vary, the maximum differential pressure values stated should not be exceeded. If necessary, reduce the given throughput. (Differential pressure = pressure at the housing bell or inlet side minus the pressure at the outlet of the cartridge housing).


The following are recommendations for water quality for use with filters. Requirement cleaning water

Silt Density Index (SDI 15) < 3.0
Fe, Mn < 0.1 ppm
Al < 0.5 ppm
Silica < 10 ppm
Colloidal Silica not detectable
Chlorine not detectable
Sum: Ca + Mg < 70 ppm
Hardness < 60 ppm CaCO3
Turbidity < 1 NTU
Oil None
Particles None