Beloit Headbox Attenuator (New Spare) – SOLD!

Apparatusforattenuatinglowfrequencypressurevariationsinastocksuspensionbeingfedtoapapermachine.Theapparatusincludesapressurizedoverflowchamberhavinganinletwhichdeliversastocksuspensionthereinandanoutletfordischargingstockfromthechamber.Afirstcontrolmeanscontrolsthepressureappliedtothesuspensionintheoverflowchamber.Thechambercommunicateswithasumpwhichreceivestheoverflowfromtheoverflowchamber.Asensingmeanssensesthestockpressureintheinletconduitandasecondsensingmeanssensesthelevelofstockinthesump.Ahighpassfilterreceivesasignalfromthefirstsensingmeansandalowpassfilterreceivesasignalfromthesecondsensingmeans.Asummingamplifierreceivestheoutputofthehighandlowpassfilters.Acontrolmeansreceivestheoutputofthesummingamplifierandisconnectedtotheoverflowmeanstocontroloperationofanoverflowvalveinresponsetotheoutputofthesummingamplifier.

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