OBERDORFER . 75PB

The pump uses a mechanical type shaft seal with a Nitrile rubber element. It is suitable for water, oils, and some mild solvents and it is limited to 212o F. Fluoroelastomer (S10) seals or Polytetrafluoroethylene (PTFE) (S11) seals are available for severe solvents, difficult chemicals, and elevated temperatures. The flow of a centrifugal pump can be conveniently controlled by a throttling valve in the discharge line without the need for a relief valve. In centrifugal pumps, the horsepower demand will decrease as the pressure increases. Maximum horsepower occurs with a wide open discharge. FEATURES Self Priming to 20 Ft. Suction Lift Heavy Duty Ball Bearings Designed for Pulley Drive Applications Stainless Steel or Nitrile Shaft (75PB-01) Polytetrafluoroethylene (PTFE) Barrier Lip Seal to Protect Motor Bearings Carbon Face Mechanical Pump Seals Fluoroelastomer (S10) or Polytetrafluoroethylene (PTFE) (S11) Pump Seals Available for Solvent Transfer Bronze Models with Nickel Alloy Shaft Ideal for Marine Service (including air conditioning, bilge, and sea water recirculation) Will Handle Contaminated Liquids DRIVE The pedestal centrifugal pumps can be direct driven by electric motors at either 3450 R.P.M. or 1725 R.P.M. Performance for both speeds are shown in the curves above. The 81PB pedestal centrifugal pump can be pulley driven at any desired intermediate speed. Because of the centrifugal pump impeller and body design, rotation must be as shown in the dimension diagram. Standard factory rotation is clockwise facing the pump shaft. If the pump is driven in the opposite direction it will pump only a very small amount. LIQUIDS TEMPERATURES The special pump alloys used provide corrosion resistance to many liquids including water, water solutions, and a wide range of commercial chemicals. Questions as to the chemical compatibility of special liquids should be referred to the factory. Viscous liquids with a maximum viscosity of 2000 Saybolt Seconds Universal can be