GPDandSPDPneumaticPumpsprovideacompact,variablespeed,airpowereddriveforQandRHpumps.Compressedairhasproventobeanidealpoweralternativewhenanelectricalhookupisnotreadilyavailable.Strokerateiseasilyvariedbyregulatingtheairflowtothedrive.Specifications:ModelGPD:Flowsupto512ml/minSpecifications:Upto400rpm;AirRequirements:14-16CFMat40psigAirInletSize:1/8 (F)NPTModelSPD:Flowsupto2300ml/minSpecifications:Upto1800rpmAirRequirements:9-10CFMat40psig.AirInletSize:1/8 (F)NPT