Oberdorfer FIP Pump Modle# N305M-08
These Rubber 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. Pump will operate when
mounted in any position.
Impeller and seals should be replaced under the following conditions:
The impeller must be replaced if it is worn out or has been damaged
by debris or by running the pump dry. Symptoms of a defective impeller
are low pumping pressure and low flow To replace the impeller remove
screws and cover pull out the impeller with needle nose pliers or two
screwdrivers. Be careful not to dent the pumping chamber with these
tools. When inserting new impeller, line up key slot in impeller with
the key in the shaft. Use oil on shaft and avoid forcing the impeller
onto the shaft. The impeller should also be removed for storage periods
to prevent the blades from taking a permanent set.
If water drips from the weep hole or from the area where the shaft
exits the pump, the seal is defective and must be replaced. Prolonged
running of the pump with a leaky seal can destroy the motor bearings
resulting in catastrophic pump failure. For seal replacement, the pump
must be removed from the motor and disassembled in order to gain access
to the seal area. Where mechanical seals are used, both components
(stationary and rotating member) must be replaced at the same time.
Refer to exploded view drawings for seal location and part numbers for
ordering purposes.
IMPORTANT
Performance is based on full voltage supply. Use direct lines. Do not
drain voltage with other electrical equipment on same circuit. Lower
voltage reduces performance and overloads motor. Use adequate wires size
and length to maintain supply voltage.
FEATURES
- Bronze construction - Corrosion resistant
- Reversible wear plate
- Nitrile mechanical seal
- Portable
- Slotted motor base
- Neoprene Impeller STD (Nitrile optional 305M-02)
- Stainless Steel Shaft
- Nitrile O-ring seal between body and cover eliminates gasket problems
- Impeller and cam easily replaced
- Available with AC or DC motors
DRIVE
The pump is driven directly from the electric
motor shaft. An aluminum adapter connects the pump to the motor.
Reversing supply leads to motor terminals reverses motor rotation. “In”
and “Out” pump ports are also reversed.
DO NOT RUN DRY - Rubber impellers generate high
rubbing friction unless lubricated by liquid pumped. Lack of liquid will
cause impeller to burn up.
LIQUIDS & 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 use.
Extremes of cold and heat will affect impeller life. Limits of 40o to
180oF 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 Permagard, or Dowgard.
SUCTION LIFT
Suction lift of 15 ft. 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.
