NDP-50 / NDP-500 Series

Yamada NDP-50 Series Double Diaphragm Pumps

Yamada NDP-50 series Air Powered Double Diaphragm (AODD) pumps provide a maximum flow rate of 166 gallons per minute. Pumps are available in aluminum, stainless steel (316), cast iron, polypropylene, and Kynar construction, with a wide variety of diaphragm materials.

NDP‑500 Stainless Steel Series

The transfer portal is officially open.

The industry’s highest‑capacity 2" diaphragm pump, delivering an impressive maximum flow of 226.

◆ Redesigned internal geometry boosts overall efficiency, allowing the pump to operate at significantly lower speeds—cutting energy use and reducing operating expenses.

◆ Compatible with existing diaphragms, balls, seats, and the trusted NDP air motor, streamlining parts management and making system upgrades effortless.

◆ The most durable diaphragm pump on the market is now even simpler to service.

• A single universal fastener is used throughout the pump body for straightforward maintenance.

• Square flanges provide stable support during service work, enabling fast teardown and reassembly.

• Lighter than comparable units, improving portability, handling, and installation.

Yamada NDP-500 Technical Data

General Specifications

• Port Dimensions: 2” Flange & NPT

• Maximum Flow Rate: 226 GPM

• Air Supply Pressure: 20–125 PSI

• Maximum Solid Size: 5/16”

• Maximum Lift: 19.5 ft

• Body Material: Stainless Steel

Maximum Liquid Temperature by Diaphragm Material

Diaphragm Material	Temperature Range
Buna	10–180°F (-12–82°C)
Neoprene	0–180°F (-17–82°C)
Santoprene	-10–180°F (-23–82°C)
EPDM	-40–212°F (-40–100°C)
PTFE	40–212°F (4–100°C)
Hytrel	0–248°F (-17–120°C)
Viton	-20–248°F (-28–120°C)
Ultimate	0–212°F (-56–100°C)