Yamada NDP-25 air-operated diaphragm pump, 1", up to 175 L/min

Yamada NDP-25 is a versatile workshop size of air-operated double diaphragm pump: flow up to 46.2 gpm (175 L/min), 1" NPT port or ANSI 150 flange, solids up to 3 mm, self-priming up to 5.5 m with rubber diaphragms. The G25 version delivers up to 40.1 gpm.

Body: aluminium, polypropylene, PVDF, AISI 316 stainless steel, cast iron. Diaphragms: neoprene, Buna-N, Santoprene, EPDM, PTFE, Hytrel, Viton, Ultimate. Polypropylene versions are limited to 82 °C. The air valve is lube-free, with tested life of over 300 million cycles.

Model code example: NDP-25BPT — NDP-25 series, B — ball valve, P — polypropylene, T — PTFE diaphragm; suffixes: -FLG flange, -HP 2:1 pressure, -D drum version, -Z split manifold, -FDA food grade version.

Key features:

• 1" NPT port or ANSI 150 flange, flow up to 175 L/min
• Self-priming up to 5.5 m (rubber diaphragms)
• Solids up to 3 mm
• Lube-free air valve, tested life over 300 million cycles
• Wide choice of body and diaphragm materials

Specifications:

• Type: AODD, 1:1
• Flow: up to 46.2 gpm (175 L/min); G25 — up to 40.1 gpm
• Port: 1" NPT or ANSI 150 flange
• Air inlet: 3/8" NPT
• Solids: up to 3 mm
• Self-priming: up to 5.5 m (rubber diaphragms)
• Air pressure: 1.4–7 bar
• Body material: aluminium, PP, PVDF, AISI 316, cast iron
• Diaphragms: neoprene, Buna-N, Santoprene, EPDM, PTFE, Hytrel, Viton, Ultimate
• Temperature (PP): up to 82 °C
• Weight: 9–20 kg

Application: Main workshop pump for general industrial liquid transfer.

Scope of supply: Pump, muffler, air valve. Flanges in the FLG version.

Before ordering: Before ordering, specify the pumped liquid and its temperature, required flow and pressure, and the body and diaphragm materials — this combination in the model code determines chemical resistance, permissible temperature and pump weight.