hydrogen peroxide or soap suds the use of alcohols is possible the removable cip sealing cap 32 tightly ends with the valve block 5 and the blowing nozzle 17 respectively so that the circulating cleaning agent 24 can be collected completely if possible returned and processed the cip collecting line 34 may e g be a flexible line it is decisive that for cleaning purposes the cip sealing cap 32 can be mounted or removed respectively for the production process as a rule blow molding machines operate with blowing air 9 of different pressure ranges e g for pre blowing finish blowing and inter blowing so that a plurality of valves 6 are then provided for introducing the blowing air 9 these are normally opened in alternating fashion likewise a plurality of bleeder valves 7 for discharging the blowing air 9 may be provided if necessary the valves being normally opened together for the sake of clarity fig1 only shows one pressure system e g that for the finishing blowing air it goes without saying that additional valves 6 7 and associated lines for additional low or high pressure systems may be provided in the blow molding machine 1 according to the disclosure likewise fig2 only shows one valve 6 and the associated channels 16 35 in a simplifying manner any desired number of valves 6 7 with the associated channels 16 35 may however be provided on the valve block 5 the design may also differ from.