Pump Performance Data

The following pump data was tested with water (specific gravity 1.0). Higher viscosity liquid products may require a lower pump RPM to achieve the desired GPM and discharge pressures.

2” Pump

Pump RPM Discharge Pressure GPM Brake HP
190 10 69 .65
190 30 65 1.8
190 50 64 3.2
190 70 62 4.0
190 100 60 5.7

3” Pump 

Pump RPM  Discharge Pressure GPM Brake HP
280 10 158 1.5
280 30 147 4.2
280 50 145 6.9
280 70 142 9.4
280 100 140 13.4

Pump Materials and Composition

NAPCO rotary gear pumps are available in ductile iron and stainless steel and come standard with high temperature nitrile rubber gears good for operating temperatures up to 240 degrees Fahrenheit. Where higher temperatures or corrosive fluid conditions are to be encountered, NAPCO can work with its customers to provide gear material out of various metals and elastomers, such as neoprene, EPDM, urethane and viton. Please check with NAPCO or your local distributor as to the suitable gear and pump case for your particular product application. For further information on the material composition of NAPCO pump parts, see Section “Pump Materials and Composition” below.

Material Shaft Impeller Housing Gasket High Pressure Seal Low Pressure Seal Bearings
Ductile Iron Alloy Steel Nitrile Rubber Carbon Steel Asbestos-free paper Viton Viton Chrome Needle
Stainless Stainless Nitrile Rubber Stainless Asbestos-free paper Viton Viton Chrome Needle

Pump Dimensional Data

  A B C D E F G H I J K L
2″ 4.25 6.25 8.38 12.75 6.63 3.63 4.5 2.0 4.0 12.0 1.125 4.50
3″ 4.37 6.25 8.38 12.75 6.63 3.63 4.5 1.187 6.0 14.0 1.125

4.50

 

NAPCO Rotary Gear Pump 3"

 

NAPCO Pump Parts and Identification Chart