Oberdorfer - 201M Flexible Impeler Pump - 7 GPM @ 2 psi - Pipe Size 1/2" - Mechanical Seal

These Flexible Impeller pumps are made of high quality bronze of maximum corrosion resistance. All shafts consist of stainless steel grade 303. Top of the line models have ball bearings and mechanical seals while others have bronze or carbon bearings and lip type seals. Impellers are made of Neoprene Rubber. Nitrile impellers are available as an option. Flexible blades on the periphery of the impeller provide the pumping action. While the impeller rotates the liquid between the blades is continuously squeezed out into the discharge port by a machined in cam located inside the pump chamber.

Features

• Bronze Construction - Corrosion Resistance
• Large Suction and Discharge Ports
• Polytetrafluoroethylene (PTFE) Barrier Seals Protecting Ball Bearings
• Mechanical Carbon Ring, Ceramic Face Main
• Pump Seal Standard, Optional Nitrile Lip Seal
• Two Sealed Ball Bearings Spaced for Maximum Load Ability
• Large Vent & Drain Openings Separate Seal & Bearing Areas
• Shaft Slinger for Additional Bearing Protection
• Neoprene Impeller Standard, Nitrile Impeller Optional
• Passivated 316 Stainless Steel Shaft
• Extra Capacity Ball Bearings plus Rugged Construction for Prolonged Service Life
• Impeller & Cam Easily Replaced

Liquids and Temperatures 

Liquids compatible with neoprene can be pumped including fresh and salt water solutions and mild chemicals. Do not pump severe solvents or acids. When possible, flush pump with fresh water after each usage. Nitrile impellers can handle oil contaminated water and kerosene at reduced impeller service life. Extremes of cold and heat will affect impeller life. Limits of 40°F to 180°F should be observed. Do not allow liquid in pump to freeze. Drain pump by loosening cover screws. Use methyl alcohol based anti-freeze compounds such as Zerex, Shell Zone, Pyro Permanent, Permagard, and Dowgard.

Drive

Direct drive with flexible coupling or pulley drive can be used. Make sure both flexible coupling halves are properly aligned. When using pulley, do not over-tighten belt.

Suction Lift

Suction lift of 15 feet is possible when impeller is wet. Suction lines must be air tight in order for pump to self prime. A foot valve at the beginning of suction line is recommended.

Performance

Dimensions