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N202M

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.  

FEATURES

  • Rugged Simplicity
  • Corrosion Resistant
  • Convenient Drain Plug
  • 2 Bolt or 5 Bolt Flange Mounting
  • Slotted Shaft Drive or Male Tang Drive
  • 2 Separate Seals: Main Pump and Flange Mounting
  • “Up” Direction In & Out Ports
  • Large Drain and Vent Openings
  • High Chrome Nickel Stainless Steel Shaft
  • Impeller Easily Replaced
  • Machined In Cam

DRIVE

Direction of shaft rotation determines inlet and outlet ports (see line dimension drawing). Prior to installation, rotate the pump manually in direction of rotation to set flexible blades in direction desired.

DO NOT RUN DRY - Rubber impellers generate high rubbing friction unless lubricated by liquid being 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 gasoline, 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 removing drain plug provided located at bottom of pump body. Use methyl alcohol based anti-freeze compounds.

SUCTION LIFT

On initial start-up, pump must be primed to prevent dry-running of the impeller. Suction lift of 15 ft. is possible when impeller is wet and pump fully primed. Suction lines must be air tight in order for pump to self prime.

PERFORMANCE

N202M Full Cam Curves

N202M 03 Half Cam Curves

N202M Parts List Sheet3

EXPLODED VIEW & PARTS LIST

202M EX VIEW

N202M Parts List Parts

 

 

DIMENSIONS

202M NEW DIMENSIONS202M-15 202M-16 NEW DIM

ROTATION

202M3 DROTATION