Specifications for NDP-25
Series Pumps

49 GPM  ::  1" Port Size

Click link to download printable PDF for:

NDP-25 Specs, Curves, Drawings (690K)

Bill of Materials

Maintenance Manual (1.14MB)

Port Dimensions

Intake & Discharge Connection

Polypropylene (PPG): 1" Female NPT
or 1" ANSI Flange B16.5 #150

Kynar® (PVDF): 1" Female NPT
or 1" ANSI Flange B16.5 #150

Aluminum (ADC-12): 1" Female NPT

Stainless Steel (316): 1" Female NPT

Cast Iron: 1" Female NPT

Air Inlet

3/8" Female NPT (includes ball valve)

Air Exhaust

3/4" 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) 212°F (100°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: 0.23 gallons (862 cc)

PTFE diaphragm: 0.17 gallons (654 cc)

Maximum Cycles Per Minute

Rubber diaphragm: 210

PTFE diaphragm: 210

Maximum Size Solid

3/16" (4.8 mm)

Maximum Dry Suction Lift

Rubber-fitted pump capability: 18-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.