The STERI-ADD autoclavable addition valve developed by Pierre Guerin enables the safe and sterile addition of additives such as acid, base, antifoam solution or nutrients from an autoclavable container (Schott bottle) into a fermenter or Sterilizable In Place (SIP) bioreactor. 

The STERI-ADD valve is available in two models to fit the largest number of SEP vessels on the market and to replace the traditional needle septum ports: 

• 21 mm bore port model: suitable for Pierre Guerin laboratory and pilot scale vessels 
• TC50.5 NAC port model for all tanks with NAC port.