166 GPM Maximum Capacity  --  2" Port Size

Click link to download printable PDF for:

NDP-50 Specs, Curves, Drawings (820K)

Bill of Materials

Maintenance Manual (2.7MB)

Port Dimensions

Intake & Discharge Connection

Polypropylene (PPG): 2" ANSI Flange B16.5 #150

Kynar® (PVDF): 2" ANSI Flange B16.5 #150

Aluminum (ADC-12): 2" ANSI Flange B16.5 #150 (with tapped 2" Female NPT)

Stainless Steel (316): 2" ANSI Flange B16.5 #150 or 2" Female NPT

Cast Iron: 2" Female NPT

Air Inlet

3/4" Female NPT (includes ball valve)

Air Exhaust

1" Female NPT (includes silencer)

Maximum Liquid Temperature*

Diaphragm Material / Temperature

Neoprene: 180°F (82°C)

Buna N: 180°F (82°C)

EPDM: 212°F (100°C)

Hytrel® (TPE) 248°F (120°C)

Santoprene® (TPO) 225°F (107°C)

Viton® fluoroelastomer 248°F (120°C)

Teflon® (PTFE) 212°F (100°C)

*Polypropylene pumps have a maximum liquid temperature of 180°F (82°C) regardless of diaphragm material. Kynar® pumps have a maximum temperature of 248°F (120°C) when fitted with Hytrel® or Viton® diaphragms.

Air Supply Pressure (All Models)

20 to 100 PSI (1.4 to 7 kgf/cm²)

Discharge Volume Per Cycle

Rubber diaphragm: 1.14 gallons (4.3 liters)

PTFE diaphragm: 0.55 gallons (2.1 liters)

Maximum Cycles Per Minute

Rubber diaphragm: 146

PTFE diaphragm: 220

Maximum Size Solid

5/16" (8 mm)

Maximum Dry Suction Lift

Rubber-fitted pump capability: 19-feet

Air Motor

Standard: Aluminum

Optional: Epoxy-coated, Teflon®-coated, or Electroless Nickel Plate

All Polypropylene, Aluminum, Cast Iron, and SS Hytrel®-fitted pumps include Buna N check balls & o-rings and Santoprene®-fitted pumps include EPDM check balls & wetted o-rings.

Kynar® (PVDF) pumps fitted with Santoprene®, Hytrel®, or Teflon® include Teflon® check balls & o-rings. Kynar®/EPDM fitted pumps include EPDM check balls & o-rings and Viton® fitted include Viton® balls & o-rings.